CA2876336C - Inert alloy anode for aluminum electrolysis and preparing method thereof - Google Patents
Inert alloy anode for aluminum electrolysis and preparing method thereof Download PDFInfo
- Publication number
- CA2876336C CA2876336C CA2876336A CA2876336A CA2876336C CA 2876336 C CA2876336 C CA 2876336C CA 2876336 A CA2876336 A CA 2876336A CA 2876336 A CA2876336 A CA 2876336A CA 2876336 C CA2876336 C CA 2876336C
- Authority
- CA
- Canada
- Prior art keywords
- weight
- parts
- metal blocks
- alloy anode
- anode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/02—Electrodes; Connections thereof
- C25C7/025—Electrodes; Connections thereof used in cells for the electrolysis of melts
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
An inert alloy anode used for aluminum electrolysis. The anode has Fe and Cu as the main constituents and comprises Sn. The addition of the Sn metal is conducive to the formation of a layer of oxidized film having a great antioxidant activity and structural stability on the surface of the inert alloy anode, and is conducive to an increase in the corrosion resistance of the anode. On this basis, the constituents of the inert alloy anode also comprise Ni, Al, and Y. The addition of the Al metal prevents the main metal constituents from being oxidized, the addition of the Y metal controls the alloy to provide a required polymorph in a preparation process, thus achieving the goal of anti-oxidation. The inert alloy anode having Fe and Cu as the main constituents has a low over-voltage, high electric conductivity, and reduced costs, and is applicable in the aluminum electrolysis industry
Description
CA Application Bakes Ref.: 11878/00003
2 METHOD THEREOF
3 Field of the Invention
4 The present invention relates to an inert alloy anode for aluminum electrolysis and a preparing method thereof, belonging to the field of aluminum electrolysis industry.
6 Background of the Invention 7 Aluminum electrolysis refers to acquisition of aluminum by alumina electrolysis. In the prior art, 8 a traditional Hall-Heroult molten salt aluminum electrolysis process is typically adopted for 9 aluminum electrolysis, this process is featured by use of a cryolite-alumina molten salt electrolysis method in which cryolite Na3A1F6 fluoride salt melt is taken as flux, A1203 is dissolved 11 in the fluoride salt, a carbon body is taken as an anode, aluminum liquid is taken as a cathode, 12 and electrolytic aluminum is obtained by performing electrochemical reaction at the anode and 13 cathode of the electrolytic cell at a high temperature ranging from 940 C to 960 C after a strong 14 direct current is introduced. In the traditional aluminum electrolysis process, a carbon anode is ceaselessly consumed in the electrolysis process, thus constant replacement for the carbon 16 anode is required; moreover, carbon dioxide, carbon monoxide, toxic fluorine hydride and other 17 waste gases are continuously generated at the anode during alumina electrolysis, emission of 18 these gases into environment will be harmful to environment and health of human and livestock, 19 so that the waste gases generated by aluminum electrolysis need to be purified before emission, which accordingly increases the investment cost of the alumina electrolysis 21 production process.
22 Consumption of the anode material in the process of aluminum electrolysis is mainly caused by 23 oxidization reaction, in the electrolysis process, of the carbon anode material used in the 24 traditional Hall-Heroult process. Therefore, many domestic and foreign researchers have commenced the study on anode material in order to reduce consumption of the anode material 26 in the process of aluminum electrolysis and simultaneously lessen waste gas emission. For 27 example, disclosed in Chinese patent document CN102230189A is a metal ceramic inert anode 28 material for aluminum electrolysis, which is obtained by the steps of preparing an NiO-NiFe204 29 metal ceramic matrix from raw materials including Ni203 and Fe203 and then adding metal copper powder and nano NiO, and which has an electric conductivity as high as 102C11.cm-1. In 31 the above art, the anode material with metal ceramic as the matrix, though hardly reacting with 32 electrolyte, is large in resistance and high in overvoltage, which results in large power 22653401.2 CA Application Blakes Ref.: 11878/00003 1 consumption of the process and high cost in the process of aluminum electrolysis; furthermore, 2 the anode material with metal ceramic as the matrix has poor thermal shock resistance and 3 consequently is liable to brittlement during use; and in addition, the processability in use of the 4 anode made from the above materials is poor just because the anode material having the metal ceramic matrix is liable to brittlement, as a result, the anode in any shape cannot be obtained.
6 To solve the problem that the anode material having the metal ceramic matrix is low in electric 7 conductivity and brittle in structure, some researchers have brought forward use of alloy metals 8 as the anode material, in order to improve the electric conductivity of the anode material and 9 simultaneously improve the processability of the anode material.
Disclosed in Chinese patent document CN1443877A is an inert anode material applied to aluminum, magnesium, rare earth 11 and other electrolysis industries, this material is formed by binary or multi-element alloy 12 composed of chromium, nickel, ferrum, cobalt, titanium, copper, aluminum, magnesium and 13 other metals, and the preparation method thereof is a method of smelting or powder metallurgy.
14 The prepared anode material is good in electric and thermal conductivity and generates oxygen in the electrolysis process, wherein in Example 1, an anode is made of the alloy material 16 composed of 37wt /0 of cobalt, 18wt% of copper, 19wt /0 of nickel, 23wt /0 of ferrum and 3wt% of 17 silver and is used for aluminum electrolysis, the anode has a current density of 1.0A/cm2 in the 18 electrolysis process at 850 C and the cell voltage is steadily maintained within a range from 19 4.1V to 4.5V in the electrolysis process, the prepared aluminum has a purity of 98.35%.
In the case that the alloy composed of a plurality of metals, including chromium, nickel, ferrum, 21 cobalt, titanium, copper, aluminum and magnesium, is used as the anode material for aluminum 22 electrolysis in the above art, this alloy anode material has higher electric conductivity than the 23 anode ceramic matrix anode material, can be processed in any shape by a smelting or powder 24 metallurgy method and is hardly consumed in the electrolysis process compared with the carbon anode material. However, a large amount of expensive metal materials are used in 26 preparation of the alloy anode in the above art to result in high cost of the anode material, and 27 thus this alloy anode fails to meet the demand on industrial cost;
moreover, the alloy anode 28 prepared from the above metal components is low in electric conductivity and high in 29 overvoltage, so that the power consumption of the process is increased, thus the alloy anode cannot meet the needs of the aluminum electrolysis process.
31 In addition, an oxide film is generated on the surface of the prepared alloy anode in the prior art, 32 and if this oxide film is destroyed, the anode material exposed to the surface will be oxidized as 22653401.2 CA Application Blakes Ref.: 11878/00003 1 a new oxide film. The oxide film on the surface of the alloy anode in the above art has low = 2 oxidization resistance and is further liable to oxidization reaction to generate products that are 3 likely to be corroded by electrolyte, and the oxide film with low stability is liable to fall off the 4 anode electrode in the electrolysis process; after the previous oxide film is corroded or falls off, the material of the alloy anode exposed to the surface will create a new oxide film by reaction 6 with oxygen, such replacement between new and old oxide films results in continuous 7 consumption and poor corrosion resistance of the anode material as well as short service life of 8 electrodes; furthermore, the corroded or falling oxide film enters into liquid aluminum in the = 9 electrolysis process of alumina to degrade the purity of the final product aluminum, as a result, the manufactured aluminum product cannot meet the demand of national standards and 11 accordingly cannot be directly used as a finished product.
12 Summary of the Invention 13 The first technical problem to be solved by the present invention is that the alloy anode in the 14 prior art is expensive in metal materials used, high in process cost, low in electric conductivity and high in overvoltage, as a result, power consumption of the process is increased; therefore, 16 provided is an inert alloy anode for aluminum electrolysis with low cost and overvoltage, and a 17 preparing method thereof.
18 Simultaneously, the second technical problem to be solved by the present invention is that, an 19 oxide film on the surface of the alloy anode in the prior art is low in oxidation resistance and liable to fall off, which leads to continuous consumption of the alloy anode and poor corrosion 21 resistance, furthermore, the corroded or falling oxide film enters into liquid aluminum to degrade 22 the purity of the final product aluminum; therefore, provided is an inert alloy anode for aluminum 23 electrolysis, which is strong in oxidization resistance of the oxide film formed on the surface and 24 not liable to fall off so as to improve the corrosion resistance thereof and the purity of the product aluminum, and a preparing method of the inert alloy anode.
26 To solve the aforementioned technical problems, the present invention provides an inert alloy 27 anode for aluminum electrolysis, which contains Fe and Cu as primary components, and further = 28 contains Sn.
29 The mass ratio of Fe to Cu to Sn is (23-40): (36-60): (0.2-5) or (40.01-80); (0.01-35.9): (0.01-0.19).
31 The inert alloy anode further contains Ni.
22653401.2 CA Application Bakes Ref.: 11878/00003 1 The mass ratio of Fe to Cu to Ni to Sn is (23-40): (36-60): (14-28): (0.2-
6 Background of the Invention 7 Aluminum electrolysis refers to acquisition of aluminum by alumina electrolysis. In the prior art, 8 a traditional Hall-Heroult molten salt aluminum electrolysis process is typically adopted for 9 aluminum electrolysis, this process is featured by use of a cryolite-alumina molten salt electrolysis method in which cryolite Na3A1F6 fluoride salt melt is taken as flux, A1203 is dissolved 11 in the fluoride salt, a carbon body is taken as an anode, aluminum liquid is taken as a cathode, 12 and electrolytic aluminum is obtained by performing electrochemical reaction at the anode and 13 cathode of the electrolytic cell at a high temperature ranging from 940 C to 960 C after a strong 14 direct current is introduced. In the traditional aluminum electrolysis process, a carbon anode is ceaselessly consumed in the electrolysis process, thus constant replacement for the carbon 16 anode is required; moreover, carbon dioxide, carbon monoxide, toxic fluorine hydride and other 17 waste gases are continuously generated at the anode during alumina electrolysis, emission of 18 these gases into environment will be harmful to environment and health of human and livestock, 19 so that the waste gases generated by aluminum electrolysis need to be purified before emission, which accordingly increases the investment cost of the alumina electrolysis 21 production process.
22 Consumption of the anode material in the process of aluminum electrolysis is mainly caused by 23 oxidization reaction, in the electrolysis process, of the carbon anode material used in the 24 traditional Hall-Heroult process. Therefore, many domestic and foreign researchers have commenced the study on anode material in order to reduce consumption of the anode material 26 in the process of aluminum electrolysis and simultaneously lessen waste gas emission. For 27 example, disclosed in Chinese patent document CN102230189A is a metal ceramic inert anode 28 material for aluminum electrolysis, which is obtained by the steps of preparing an NiO-NiFe204 29 metal ceramic matrix from raw materials including Ni203 and Fe203 and then adding metal copper powder and nano NiO, and which has an electric conductivity as high as 102C11.cm-1. In 31 the above art, the anode material with metal ceramic as the matrix, though hardly reacting with 32 electrolyte, is large in resistance and high in overvoltage, which results in large power 22653401.2 CA Application Blakes Ref.: 11878/00003 1 consumption of the process and high cost in the process of aluminum electrolysis; furthermore, 2 the anode material with metal ceramic as the matrix has poor thermal shock resistance and 3 consequently is liable to brittlement during use; and in addition, the processability in use of the 4 anode made from the above materials is poor just because the anode material having the metal ceramic matrix is liable to brittlement, as a result, the anode in any shape cannot be obtained.
6 To solve the problem that the anode material having the metal ceramic matrix is low in electric 7 conductivity and brittle in structure, some researchers have brought forward use of alloy metals 8 as the anode material, in order to improve the electric conductivity of the anode material and 9 simultaneously improve the processability of the anode material.
Disclosed in Chinese patent document CN1443877A is an inert anode material applied to aluminum, magnesium, rare earth 11 and other electrolysis industries, this material is formed by binary or multi-element alloy 12 composed of chromium, nickel, ferrum, cobalt, titanium, copper, aluminum, magnesium and 13 other metals, and the preparation method thereof is a method of smelting or powder metallurgy.
14 The prepared anode material is good in electric and thermal conductivity and generates oxygen in the electrolysis process, wherein in Example 1, an anode is made of the alloy material 16 composed of 37wt /0 of cobalt, 18wt% of copper, 19wt /0 of nickel, 23wt /0 of ferrum and 3wt% of 17 silver and is used for aluminum electrolysis, the anode has a current density of 1.0A/cm2 in the 18 electrolysis process at 850 C and the cell voltage is steadily maintained within a range from 19 4.1V to 4.5V in the electrolysis process, the prepared aluminum has a purity of 98.35%.
In the case that the alloy composed of a plurality of metals, including chromium, nickel, ferrum, 21 cobalt, titanium, copper, aluminum and magnesium, is used as the anode material for aluminum 22 electrolysis in the above art, this alloy anode material has higher electric conductivity than the 23 anode ceramic matrix anode material, can be processed in any shape by a smelting or powder 24 metallurgy method and is hardly consumed in the electrolysis process compared with the carbon anode material. However, a large amount of expensive metal materials are used in 26 preparation of the alloy anode in the above art to result in high cost of the anode material, and 27 thus this alloy anode fails to meet the demand on industrial cost;
moreover, the alloy anode 28 prepared from the above metal components is low in electric conductivity and high in 29 overvoltage, so that the power consumption of the process is increased, thus the alloy anode cannot meet the needs of the aluminum electrolysis process.
31 In addition, an oxide film is generated on the surface of the prepared alloy anode in the prior art, 32 and if this oxide film is destroyed, the anode material exposed to the surface will be oxidized as 22653401.2 CA Application Blakes Ref.: 11878/00003 1 a new oxide film. The oxide film on the surface of the alloy anode in the above art has low = 2 oxidization resistance and is further liable to oxidization reaction to generate products that are 3 likely to be corroded by electrolyte, and the oxide film with low stability is liable to fall off the 4 anode electrode in the electrolysis process; after the previous oxide film is corroded or falls off, the material of the alloy anode exposed to the surface will create a new oxide film by reaction 6 with oxygen, such replacement between new and old oxide films results in continuous 7 consumption and poor corrosion resistance of the anode material as well as short service life of 8 electrodes; furthermore, the corroded or falling oxide film enters into liquid aluminum in the = 9 electrolysis process of alumina to degrade the purity of the final product aluminum, as a result, the manufactured aluminum product cannot meet the demand of national standards and 11 accordingly cannot be directly used as a finished product.
12 Summary of the Invention 13 The first technical problem to be solved by the present invention is that the alloy anode in the 14 prior art is expensive in metal materials used, high in process cost, low in electric conductivity and high in overvoltage, as a result, power consumption of the process is increased; therefore, 16 provided is an inert alloy anode for aluminum electrolysis with low cost and overvoltage, and a 17 preparing method thereof.
18 Simultaneously, the second technical problem to be solved by the present invention is that, an 19 oxide film on the surface of the alloy anode in the prior art is low in oxidation resistance and liable to fall off, which leads to continuous consumption of the alloy anode and poor corrosion 21 resistance, furthermore, the corroded or falling oxide film enters into liquid aluminum to degrade 22 the purity of the final product aluminum; therefore, provided is an inert alloy anode for aluminum 23 electrolysis, which is strong in oxidization resistance of the oxide film formed on the surface and 24 not liable to fall off so as to improve the corrosion resistance thereof and the purity of the product aluminum, and a preparing method of the inert alloy anode.
26 To solve the aforementioned technical problems, the present invention provides an inert alloy 27 anode for aluminum electrolysis, which contains Fe and Cu as primary components, and further = 28 contains Sn.
29 The mass ratio of Fe to Cu to Sn is (23-40): (36-60): (0.2-5) or (40.01-80); (0.01-35.9): (0.01-0.19).
31 The inert alloy anode further contains Ni.
22653401.2 CA Application Bakes Ref.: 11878/00003 1 The mass ratio of Fe to Cu to Ni to Sn is (23-40): (36-60): (14-28): (0.2-
5) or (40.01-80): (0.01-2 35.9): (28.1-70): (0.01-0.19).
3 The inert alloy anode is composed of Fe, Cu, Ni and Sn, wherein the content of Fe is 23-40wr/o, 4 the content of Cu is 36-60wr/o, the content of Ni is 14-28wr/o and the content of Sn is 0.2-5wV/0, or the content of Fe is 40.01-71.88wr/o, the content of Cu is 0.01-31.88wr/o, the content of Ni is
3 The inert alloy anode is composed of Fe, Cu, Ni and Sn, wherein the content of Fe is 23-40wr/o, 4 the content of Cu is 36-60wr/o, the content of Ni is 14-28wr/o and the content of Sn is 0.2-5wV/0, or the content of Fe is 40.01-71.88wr/o, the content of Cu is 0.01-31.88wr/o, the content of Ni is
6 28.1-59.97wt% and the content of Sn is 0.01-0.19wr/o.
7 The inert alloy anode further contains Al.
8 The inert alloy anode is composed of Fe, Cu, Ni, Sn and Al, wherein the content of Fe is 23-
9 40wr/o, the content of Cu is 36-60wV/0, the content of Ni is 14-28wr/o, the content of Al is more than zero and less than or equal to 4wt% and the content of Sn is 0.2-5wt%, or the content of 11 Fe is 40.01-71.88wr/o, the content of Cu is 0.01-31.88wt%, the content of Ni is 28.1-59.97wt%, 12 the content of Al is more than zero and less than or equal to 4wt% and the content of Sn is 0.01-13 0.19wr/o.
14 The inert alloy anode further contains Y.
The inert alloy anode is composed of Fe, Cu, Ni, Sn, Al and Y, wherein the content of Fe is 23-16 40wr/o, the content of Cu is 36-60wr/o, the content of Ni is 14-28wV/0, the content of Al is more 17 than zero and less than or equal to 4wt%, the content of Y is more than zero and less than or 18 equal to 2wt% and the content of Sn is 0.2-5wt%, or the content of Fe is 40.01-71.88wt%, the 19 content of Cu is 0.01-31.88wt%, the content of Ni is 28.1-59.97wr/o, the content of Al is more than zero and less than or equal to 4wt%, the content of Y is more than zero and less than or 21 equal to 2wV/0 and the content of Sn is 0.01-0.19wt%.
22 A preparing method of the inert alloy anode comprises the following steps:
23 melting and uniformly mixing the metals Fe, Cu and Sn, and then rapidly casting and cooling the 24 mixture to obtain the inert alloy anode;
or, melting the metals Fe, Cu and Sn at first, then adding and melting the metal Al or Y, and 26 uniformly mixing, or adding and melting the metal Al at first, then adding and melting the metal 27 Y, uniformly mixing, and rapidly casting and cooling the mixture to obtain the inert alloy anode;
22653401.2 CA Application Blakes Ref.: 11878/00003 1 or, melting and mixing the metals Fe, Cu, Ni and Sn and then casting the mixture to obtain the 2 inert alloy anode;
3 or, melting the metals Fe, Cu, Ni and Sn at first, then adding and melting the metal Al or Y, and 4 uniformly mixing, or adding and melting the metal Al at first, then adding and melting the metal Y, uniformly mixing, and casting the mixture to obtain the inert alloy anode.
6 Compared with the prior art, the inert alloy anode for aluminum electrolysis in the present 7 invention has the beneficial effects below:
8 (1) The inert alloy anode for aluminum electrolysis in the present invention contains Fe and Cu 9 as primary components, and further contains Sn. The inert alloy anode with the above components is low in cost, low in overvoltage and small in power consumption of the aluminum 11 electrolysis process; the anode material is alloy composed of Fe, Cu and Sn, so an oxide film 12 formed on the surface of the inert alloy anode in the electrolysis process is high in oxidation 13 resistance and is hardly corroded by electrolyte, and the formed oxide film is stable and not 14 liable to fall off, therefore, the inert alloy anode is imparted with quite high oxidation resistance and corrosion resistance. It is precisely because of high oxidation resistance and corrosion 16 resistance of the inert alloy anode, impurities entering into liquid aluminum, which are generated 17 by corrosion or falling off of the anode material, are avoided, so as to ensure the purity of 18 aluminum products, that is, the purity of the produced aluminum can reach 99.8%. The following 19 problems are avoided: the alloy anode in the prior art has high cost and overvoltage and large power consumption of process, the oxide film on the alloy surface is low in oxidation resistance 21 and liable to fall off, which leads to continuous consumption of the alloy anode and poor 22 corrosion resistance, furthermore, the corroded or falling oxide film enters into liquid aluminum 23 to degrade the purity of the final product aluminum.
24 (2) The inert alloy anode for aluminum electrolysis in the present invention is composed of Fe, Cu, Ni and Sn, wherein the content of Fe is 23-40wV/0, the content of Cu is 36-60wr/o, the 26 content of Ni is 14-28wt /0 and the content of Sn is 0.2-5wt%, or the content of Fe is 40.01-27 71.88wr/o, the content of Cu is 0.01-31.88wt%, the content of Ni is 28.1-59.97wt% and the 28 content of Sn is 0.01-0.19wV/0.
29 The alloy anode in the present invention contains Fe and Cu as primary components, their content proportions are high, so the material cost of the inert alloy anode is reduced, 31 meanwhile, the inert alloy anode composed of the aforementioned metal components is high in 22653401.2 CA Application Slakes Ref.: 11878/00003 1 electric conductivity and has a cell voltage as low as 3.1V to 3.4V, power consumption for 2 aluminum electrolysis is small, the power consumption for per ton of aluminum is not more than 3 11000kw-h, so the production cost of electrolytic aluminum is low. The following problems are 4 avoided: a large quantity of expensive metal materials are used in the anode material in the prior art, resulting in increase of the anode production cost; the prepared alloy anode is low in 6 electric conductivity, large in power consumption for aluminum electrolysis and increased in 7 cost, and cannot be applied to industrial production. The added metal Ni is capable of promoting 8 firmer combination among other types of metals, and the added metal Sn ensures that an oxide 9 film with high oxidization resistance, good corrosion resistance and high stability can be formed on the surface of the inert alloy anode in the electrolysis process.
11 (3) The inert alloy anode for aluminum electrolysis in the present invention is composed of Fe, 12 Cu, Ni, Sn, Al and Y, wherein the content of Fe is 23-40wr/o, the content of Cu is 36-60wr/o, the 13 content of Ni is 14-28wt%, the content of Al is more than zero and less than or equal to 4wt /0, 14 the content of Y is more than zero and less than or equal to 2wtc)/0 and the content of Sn is 0.2-5wr/o, or the content of Fe is 40.01-71.88wV/0, the content of Cu is 0.01-31.88wt 70, the content 16 of Ni is 28.1-59.97wt%, the content of Al is more than zero and less than or equal to 4w1%, the 17 content of Y is more than zero and less than or equal to 2wt% and the content of Sn is 0.01-18 0.19wt%. Similarly, the aforementioned inert alloy anode has the advantages of low material 19 cost and high electric conductivity, in addition, the metal Al contained in the aforementioned inert alloy anode plays a role of oxidization resistance and can serve as a reducing agent for 21 metallothermic reduction reaction with a metal oxide in the inert anode alloy, thus ensure the 22 percentage of the primary components in the inert alloy anode, meanwhile, the added metal Y
23 can be used for controlling a crystal structure for anode material formation in the preparation 24 process of the inert anode, achieving the anti-oxidization purpose.
(4) The inert alloy anode for aluminum electrolysis in the present invention has a melting point of 26 1360-1386 C, a specific resistivity of 68-76.8p0=cm at 20 C anb a density of 8.1-8.3g/cm3. The = 27 prepared inert alloy anode has a quite high melting point and accordingly can meet the demand 28 of aluminum electrolysis on high temperature environment; furthermore, the aforementioned 29 inert alloy anode has a quite low overvoltage, so power consumption of the aluminum electrolysis process can be reduced; the prepared inert alloy anode is even in texture and has a 31 density within a range from 8.1 g/cm3 to 8.3g/cm3, in this way, stable service property of the 32 inert alloy anode is guaranteed.
22653401.2 CA Application Blakes Ref.: 11878/00003 1 (5) The preparing method of the inert alloy anode comprises the following steps: melting and 2 uniformly mixing the metals Fe, Cu and Sn, and then rapidly casting and cooling the mixture to 3 obtain the inert alloy anode; or, melting the metals Fe, Cu and Sn at first, then adding and 4 melting the metal Al or Y, and uniformly mixing, or adding and melting the metal Al at first, then adding and melting the metal Y, uniformly mixing, and rapidly casting and cooling the mixture to 6 obtain the inert alloy anode; or, melting and mixing the metals Fe, Cu, Ni and Sn and then 7 casting the mixture to obtain the inert alloy anode; or, melting the metals Fe, Cu, Ni and Sn at 8 first, then adding and melting the metal Al or Y, and uniformly mixing, or adding and melting the 9 metal Al at first, then adding and melting the metal Y, uniformly mixing, and casting the mixture to obtain the inert alloy anode. The aforementioned inert alloy anode is simple in preparation 11 process and can be prepared in any shape according to the actual needs.
During preparation of 12 the alloy containing the metals Al and Y, Al is added at first to prevent other molten metal 13 components from being oxidized, and then, Y is added and molten to finally obtain the alloy 14 having a desired crystal form.
For more easily understanding the technical solution of the present invention, further description 16 will be made below to the technical solution of the present invention in conjunction with the 17 embodiments.
18 Detailed Description of the Embodiments 19 Embodiment 1 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks and 0.2 parts by 21 weight of Sn metal blocks are molten and then uniformly mixed under high-speed 22 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-23 100 C/s to obtain an inert alloy anode 1 which is homogeneous in texture. The inert alloy anode 24 has a density of 8.3g/cm3, a specific resistivity of 62p0=cm and a melting point of 1400 C.
Embodiment 2 26 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks and 5 parts by 27 weight of Sn metal blocks are molten and then uniformly mixed under high-speed 28 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-29 100 C/s to obtain an inert alloy anode 2 which is homogeneous in texture. The inert alloy anode has a density of 7.8g/cm3, a specific resistivity of 82pc).cm and a melting point of 1369 C.
22653401.2 CA Application Blakes Rel.: 11878/00003 1 Embodiment 3 2 30 parts by weight of Fe metal blocks, 45 parts by weight of Cu metal blocks and 3 parts by 3 weight of Sn metal blocks are molten and then uniformly mixed under high-speed 4 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-100 C/s to obtain an inert alloy anode 3 which is homogeneous in texture. The inert alloy anode 6 has a density of 7.9g/cm3, a specific resistivity of 86pQ=cm and a melting point of 1390 C.
7 Embodiment 4 8 30 parts by weight of Fe metal blocks, 50 parts by weight of Cu metal blocks, 20 parts by weight =
9 of Mo and 5 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 4. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 78pQ=cm and a 11 melting point of 1370 C.
12 Embodiment 5 13 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks, 14 parts by weight 14 of Ni and 3 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 5. The inert alloy anode has a density of 8.3g/cm3, a specific resistivity of 68pD=cm and a 16 melting point of 1360 C.
17 Embodiment 6 18 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks, 19 parts by weight 19 of Ni and 5 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 6. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 76.8pD=cm and 21 a melting point of 1386 C.
22 Embodiment 7 23 25 parts by weight of Fe metal blocks, 46.8 parts by weight of Cu metal blocks, 28 parts by 24 weight of Ni and 0.2 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 7. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 26 72pQ=cm and a melting point of 1350 C.
27 Embodiment 8 28 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks, 14 parts by weight 29 of Ni and 3 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 8. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 70pQ=cm and a 31 melting point of 1330 C.
22653401.2 8 =
CA Application Blakes Ref.: 11878/00003 1 Embodiment 9 2 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks, 19 parts by weight 3 of Ni and 5 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy 4 anode 9. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 73p0-cm and a melting point of 1340 C.
6 Embodiment 10 7 24 parts by weight of Fe metal blocks, 47.8 parts by weight of Cu metal blocks, 28 parts by 8 weight of Ni and 0.2 parts by weight of Sn metal blocks are molten and then cast to obtain an 9 inert alloy anode 10. The inert alloy anode has a density of 8.0g/cm3, a specific resistivity of 74p0=cm and a melting point of 1350 C.
11 Embodiment 11 12 30 parts by weight of Fe metal blocks, 41 parts by weight of Cu metal blocks and 5 parts by 13 weight of Sn metal blocks are molten at first, then 3 parts by weight of Al metal blocks are 14 added and sequentially molten, uniform mixing is performed under high-speed electromagnet stirring, and the mixture is rapidly cast and then rapidly cooled to obtain an inert alloy anode 11.
16 The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 68p0=cm and a melting 17 point of 1370 C.
18 Embodiment 12 19 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks, 14 parts by weight of Ni and 0.2 parts by weight of Sn metal blocks are molten at first, then 2.8 parts by weight of 21 Al metal blocks are added and sequentially molten, and an inert alloy anode 12 is obtained by 22 casting. The inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 69pQ=cm and a 23 melting point of 1340 C.
24 Embodiment 13 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks, 15 parts by weight 26 of Ni and 5 parts by weight of Sn metal blocks are molten at first, then 4 parts by weight of Al 27 metal blocks are added and sequentially molten, and an inert alloy anode 13 is obtained by 28 casting. The inert alloy anode has a density of 8.15g/cm3, a specific resistivity of 69p0=cm and a 29 melting point of 1369 C.
22653401.2 9 CA Application Blakes Ref.: 11878/00003 1 Embodiment 14 2 36 parts by weight of Fe metal blocks, 47 parts by weight of Cu metal blocks, 14 parts by weight = 3 of Ni and 2.9 parts by weight of Sn metal blocks are molten at first, then 0.1 parts by weight of 4 Al metal blocks are added and sequentially molten, and an inert alloy anode 14 is obtained by casting. The inert alloy anode has a density of 8.0g/cm3, a specific resistivity of 67.6pQ=cm and 6 a melting point of 1379 C.
7 Embodiment 15 8 27 parts by weight of Fe metal blocks, 50 parts by weight of Cu metal blocks and 4 parts by 9 weight of Sn metal blocks are molten at first, then 1 part by weight of Y
metal blocks are added and sequentially molten, uniform mixing is performed under high-speed electromagnet stirring, 11 and the mixture is rapidly cast and then rapidly cooled to obtain an inert alloy anode 15. The 12 inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 6.7p0-cm and a melting point 13 of 1358 C.
14 Embodiment 16 35 parts by weight of Fe metal blocks, 45 parts by weight of Cu metal blocks, 24 parts by weight 16 of Ni and 4 parts by weight of Sn metal blocks are molten at first, then 2 parts by weight of Y
17 metal blocks are added and sequentially molten, and an inert alloy anode 16 is obtained by 18 casting. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 70.9p0=cm and 19 a melting point of 1375 C.
Embodiment 17 21 25 parts by weight of Fe metal blocks, 50 parts by weight of Cu metal blocks and 4 parts by 22 weight of Sn metal blocks are molten at first, then 3 parts by weight of Al metal blocks are 23 added and sequentially molten, finally, 1 part by weight of Y metal blocks are added and molten, 24 uniform mixing is performed under high-speed electromagnet stirring, and the mixture is rapidly cast and then rapidly cooled to obtain an inert alloy anode 17. The inert alloy anode has a 26 density of 8.3g/cm3, a specific resistivity of 68.9pQ=cm and a melting point of 1381 C.
27 Embodiment 18 28 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks, 14 parts by weight 29 of Ni and 0.9 parts by weight of Sn metal blocks are molten at first, then 0.1 parts by weight of Al metal blocks are added and sequentially molten, finally, 2 parts by weight of Y metal blocks 31 are added and molten, mixing is performed, and the mixture is cast to obtain an inert alloy 22653401.2 10 CA Application Blakes Ref.: 11878/00003 1 anode 18. The inert alloy anode has a density of 8.3g/cm3, a specific resistivity of 68p0=cm and 2 a melting point of 1360 C.
3 Embodiment 19 4 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks, 14.9 parts by weight of Ni and 5 parts by weight of Sn metal blocks are molten at first, then 4 parts by weight 6 of Al metal blocks are added and sequentially molten, finally, 0.1 parts by weight of Y metal 7 blocks are added and molten, mixing is performed, and the mixture is cast to obtain an inert 8 alloy anode 19. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 9 76.8p0=cm and a melting point of 1386 C.
Embodiment 20 11 29 parts by weight of Fe metal blocks, 38.3 parts by weight of Cu metal blocks, 28 parts by 12 weight of Ni and 0.2 parts by weight of Sn metal blocks are molten at first, then 3.5 parts by 13 weight of Al metal blocks are added and sequentially molten, finally, 1 part by weight of Y metal 14 blocks are added and molten, mixing is performed, and the mixture is cast to obtain an inert alloy anode 20. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 70p0=cm 16 and a melting point of 1365 C.
17 Embodiment 21 18 40 parts by weight of Fe metal blocks, 36.5 parts by weight of Cu metal blocks, 18 parts by 19 weight of Ni and 3 parts by weight of Sn metal blocks are molten at first, then 1.5 parts by weight of Al metal blocks are added and sequentially molten, finally, 1 part by weight of Y metal 21 blocks are added and molten, mixing is performed, and the mixture is cast to obtain an inert 22 alloy anode 21. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 23 76.8p0-cm and a melting point of 1386 C.
24 Embodiment 22 24.3 parts by weight of Fe metal blocks, 59 parts by weight of Cu metal blocks, 14 parts by 26 weight of Ni. and 0.2 parts by weight of Sn metal blocks are molten at first, then 2 parts by 27 weight of Al metal blocks are added and sequentially molten, finally, 0.5 parts by weight of Y
28 metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 29 inert alloy anode 22. The inert alloy anode has a density of 8.22g/cm3, a specific resistivity of 68.2p0=cm and a melting point of 1360 C.
22653401.2 CA Application Blakes Ref.: 11878/00003 1 In the aforementioned embodiment, 1 part by weight is 10g, and the inert anode alloy resulted 2 from casting can be in any shape as required.
3 Embodiment 23 4 40.01 parts by weight of Fe metal blocks, 35.9 parts by weight of Cu metal blocks and 0.19 parts by weight of Sn metal blocks are molten and then uniformly mixed under high-speed 6 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-7 100 C/s to obtain an inert alloy anode 23 which is homogeneous in texture. The inert alloy 8 anode has a density of 8.2g/cm3, a specific resistivity of 61pQ=cm and a melting point of 9 1400 C.
= 10 Embodiment 24 11 80 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks and 0.01 parts by 12 weight of Sn metal blocks are molten and then uniformly mixed under high-speed 13 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-14 100 C/s to obtain an inert alloy anode 24 which is homogeneous in texture. The inert alloy anode has a density of 7.5g/cm3, a specific resistivity of 82pQ=cm and a melting point of 16 1369 C.
17 Embodiment 25 18 60 parts by weight of Fe metal blocks, 25 parts by weight of Cu metal blocks and 0. 1 part by 19 weight of Sn metal blocks are molten and then uniformly mixed under high-speed electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-21 100 C/s to obtain an inert alloy anode 25 which is homogeneous in texture. The inert alloy 22 anode has a density of 7.9g/cm3, a specific resistivity of 84pD=cm and a melting point of 23 1390 C.
24 Embodiment 26 50 parts by weight of Fe metal blocks, 30 parts by weight of Cu metal blocks, 20 parts by weight 26 of Mo and 0.05 parts by weight of Sn metal blocks are molten and then cast to obtain an inert 27 alloy anode 26. The inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 78pD=cm 28 and a melting point of 1370 C.
= 29 Embodiment 27 40.01 parts by weight of Fe metal blocks, 35.9 parts by weight of Cu metal blocks, 70 parts by 31 weight of Ni and 0.01 parts by weight of Sn metal blocks are molten and then cast to obtain an 22653401.2 CA Application Blakes Ref.: 11878/00003 1 inert alloy anode 27. The inert alloy anode has a density of 8.5g/cm3, a specific resistivity of 2 68p0=cm and a melting point of 1360 C.
3 Embodiment 28 4 80 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks, 28.1 parts by weight of Ni and 0.19 parts by weight of Sn metal blocks are molten and then cast to obtain an 6 inert alloy anode 28. The inert alloy anode has a density of 7.7g/cm3, a specific resistivity of 7 76.8p0=cm and a melting point of 1386 C.
8 Embodiment 29 9 71.88 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks, 28.1 parts by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten and then cast to obtain an 11 inert alloy anode 29. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 12 72p0=cm and a melting point of 1350 C.
13 Embodiment 30 14 40.01 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks, 28.1 parts by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten and then cast to obtain 16 an inert alloy anode 30. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 17 70p0=cm and a melting point of 1330 C.
18 Embodiment 31 19 40 parts by weight of Fe metal blocks, 0.02 parts by weight of Cu metal blocks, 59.97 parts by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten and then cast to obtain an 21 inert alloy anode 31. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 22 731J0=cm and a melting point of 1340 C.
23 Embodiment 32 24 45 parts by weight of Fe metal blocks, 4.81 parts by weight of Cu metal blocks, 50 parts by weight of Ni and 0.19 parts by weight of Sn metal blocks are molten and then cast to obtain an 26 inert alloy anode 32. The inert alloy anode has a density of 8.0g/cm3, a specific resistivity of 27 74p0=cm and a melting point of 1350 C.
28 Embodiment 33 29 60 parts by weight of Fe metal blocks, 35.9 parts by weight of Cu metal blocks and 0.1 parts by weight of Sn metal blocks are molten at first, then 4 parts by weight of Al metal blocks are 22653401.2 CA Application Blakes Ref.: 11878/00003 1 added and sequentially molten, uniformly mixing is performed under high-speed 2 electromagnetic stirring, and the mixture is rapidly cast and then rapidly cooled to obtain an inert 3 alloy anode 33. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 68p0=cm 4 and a melting point of 1370 C.
Embodiment 34 6 40.01 parts by weight of Fe metal blocks, 27.7 parts by weight of Cu metal blocks, 28.1 parts by 7 weight of Ni and 0.19 parts by weight of Sn metal blocks are molten at first, then 4 parts by 8 weight of Al metal blocks are added and sequentially molten, and an inert alloy anode 34 is 9 obtained by casting. The inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 69p0=cm and a melting point of 1340 C.
11 Embodiment 35 12 71.88 parts by weight of Fe metal blocks, 0.005 parts by weight of Cu metal blocks, 28.1 parts 13 by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten at first, then 0.005 parts 14 by weight of Al metal blocks are added and sequentially molten, and an inert alloy anode 35 is obtained by casting. The inert alloy anode has a density of 8.15g/cm3, a specific resistivity of 16 69pQ=cm and a melting point of 1369 C.
17 Embodiment 36 18 40.01 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks, 25.01 parts 19 by weight of Ni and 0.1 parts by weight of Sn metal blocks are molten at first, then 3 parts by weight of Al metal blocks are added and sequentially molten, and an inert alloy anode 36 is 21 obtained by casting. The inert alloy anode has a density of 8.0g/cm3, a specific resistivity of 22 67.6pQ=cm and a melting point of 1379 C.
23 Embodiment 37 24 66 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks and 0.01 parts by weight of Sn metal blocks are molten at first, then 2 parts by weight of Y
metal blocks are 26 added and sequentially molten, uniformly mixing is performed under high-speed 27 electromagnetic stirring, and the mixture is rapidly cast and then rapidly cooled to obtain an inert 28 alloy anode 37. The inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 67p0..cm 29 and a melting point of 1358 C.
22653401.2 CA Application Blakes Ref.: 11878/00003 1 Embodiment 38 2 40 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks, 59.97 parts by 3 weight of Ni and 0.01 parts by weight of Sn metal blocks are molten at first, then 0.01 parts by 4 weight of Y metal blocks are added and sequentially molten, and an inert alloy anode 38 is obtained by casting. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 4. 6 70.9p0=cm and a melting point of 1375 C.
7 Embodiment 39 8 62 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks and 0.19 parts 9 by weight of Sn metal blocks are molten at first, then, 4 parts by weight of Al metal blocks are added and sequentially molten, finally, 2 parts by weight of Y metal blocks are added and 11 molten, uniform mixing is performed under high-speed electromagnet stirring, and the mixture is 12 rapidly cast and then rapidly cooled to obtain an inert alloy anode 39.
The inert alloy anode has 13 a density of 8.3g/cm3, a specific resistivity of 68.9pO=cm and a melting point of 1381 C.
14 Embodiment 40 40 parts by weight of Fe metal blocks, 25.7 parts by weight of Cu metal blocks, 28.1 parts by 16 weight of Ni and 0.19 parts by weight of Sn metal blocks are molten at first, then 4 parts by 17 weight of Al metal blocks are added and sequentially molten, finally, 2 parts by weight of Y
18 metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 19 inert alloy anode 40. The inert alloy anode has a density of 8.3g/cm3, a specific resistivity of 68p0=cm and a melting point of 1360 C.
21 Embodiment 41 22 71.88 parts by weight of Fe metal blocks, 0.005 parts by weight of Cu metal blocks, 28.1 parts 23 by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten at first, then, 0.002 parts 24 by weight of Al metal blocks are added and sequentially molten, finally, 0.003 parts by weight of Y metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 26 inert alloy anode 41. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 27 76.8p0=cm and a melting point of 1386 C.
28 Embodiment 42 29 36.92 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks, 28.1 parts by weight of Ni and 0.1 parts by weight of Sn metal blocks are molten at first, then 1 part by 31 weight of Al metal blocks are added and sequentially molten, finally, 2 parts by weight of Y
22653401.2 CA Application Blakes Ref.: 11878/00003 1 metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 2 inert alloy anode 42. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 3 70pQ=cm and a melting point of 1365 C.
4 Embodiment 43 39.81 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks, 59.97 parts 6 by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten at first, then 0.1 parts by 7 weight of Al metal blocks are added and sequentially molten, finally, 0.1 parts by weight of Y
8 metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 9 inert alloy anode 43. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 76.8p0=cm and a melting point of 1386 C.
11 Embodiment 44 12 45 parts by weight of Fe metal blocks, 24.4 parts by weight of Cu metal blocks, 29 parts by 13 weight of Ni and 0.1 parts by weight of Sn metal blocks are molten at first, then 1 part by weight 14 of Al metal blocks are added and sequentially molten, finally, 0.5 parts by weight of Y metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an inert 16 alloy anode 44. The inert alloy anode has a density of 8.22g/cm3, a specific resistivity of 17 68.2pQ=cm and a melting point of 1360 C.
18 In the aforementioned embodiments 23-44, 1 part by weight is 100g, and the inert anode alloy 19 resulted from casting can be in any shape as required.
Comparative Example 21 The alloy powders containing 37wt /0 of Co, 18wt /0 of Cu, 19wt% of Ni, 23wt /0 of Fe and 3wt /0 22 of Ag are subjected to powder metallurgic process to obtain an anode, and before use, an oxide 23 film is formed on the surface of the metal anode by pre-oxidization at 1000 C to obtain an inert 24 alloy anode A.
Test Example 26 The inert alloy anodes 1-44 and A are each taken as an anode, graphite is taken as a cathode, 27 the anode and the cathode are vertically inserted into an electrolytic cell provided with a 28 corundum liner, and the distance between the anode and the cathode is 3cm. The anode has a 29 current density of 1.0A/cm2 at 760 C, and is electrolyzed for up to 40 hours in an electrolyte having the components including 32wt% of sodium fluoride, 57wt /0 of aluminum fluoride, 3wt /0 22653401.2 CA Application Blakes Ref.: 11878/00003 1 of lithium fluoride, 4wr/0 of potassium fluoride and 4wt 70 of alumina, and the test results are 2 shown in the Table below:
Direct Current Consumption for Per Purity of Product Inert Alloy Anode Cell Voltage (V) Ton of Aluminum Aluminum (%) (kw.h) 1 3.10 10040 99.80 2 3.14 10170 99.81 3 3.22 10429 99.85 4 3.16 10235 99.80 3.10 10040 99.85 6 3.39 10979 99.82 7 3.15 10202 99.85 8 3.27 10591 99.85 9 3.18 10299 99.83 3.36 10882 99.81 11 3.28 10623 99.80 12 3.40 11000 99.82 13 3.32 10753 99.84 14 3.25 10526 99.82 3.12 10105 99.80 16 3.27 10591 99.81 17 3.35 10850 99.83 18 3.38 10947 99.80 19 3.16 10234 99.82 3.32 10753 99.83 21 3.10 10040 99.81 22 3.12 10105 99.82 23 3.11 10040 99.80 24 3.13 10159 99.81 3.21 10429 99.85 22653401.2 CA Application Blakes Ref.: 11878/00003 26 3.15 10236 99.80 27 3.11 10041 99.90 28 3.38 10979 99.82 29 3.14 10202 99.85 30 3.26 10591 99.91 31 3.17 10299 99.83 32 3.35 10879 99.81 33 3.27 10623 99.80 34 3.39 11000 99.82 35 3.33 10753 99.84 36 3.25 10526 99.82 37 3.12 10105 99.80 38 3.27 10591 99.81 39 3.35 10850 99.83 40 3.38 10945 99.80 41 3.16 10234 99.82 42 3.32 10753 99.83 43 3.10 10040 99.81 44 3.12 10110 99.82 A 4.48 14510 98.35 2 It can be seen from the test results of the aforementioned embodiments and the comparative 3 example that in the process of aluminum electrolysis, the inert alloy anode in the present 4 invention has a cell voltage much lower than that of the alloy anode in the comparative example, consequently, using the inert alloy anode in the present invention can reduce the power 6 consumption in an aluminum electrolysis process remarkably, which further reduces energy 7 waste and lower cost. Meanwhile, the inert alloy anode in the present invention can be used for 8 producing aluminum products which meet the high-purity standard, i.e. the purity of these 9 aluminum products can be over 99.8, which meets the national primary aluminum standard.
Detailed description has been made to the specific contents of the present invention in the 11 aforementioned embodiments, and it should be understood by those skilled in this art that 22653401.2 CA Application Blakes Ref.: 11878/00003 1 modifications and detail variations in any form based upon the present invention pertain to the 2 scope that the present invention seeks to protect.
22653401.2
14 The inert alloy anode further contains Y.
The inert alloy anode is composed of Fe, Cu, Ni, Sn, Al and Y, wherein the content of Fe is 23-16 40wr/o, the content of Cu is 36-60wr/o, the content of Ni is 14-28wV/0, the content of Al is more 17 than zero and less than or equal to 4wt%, the content of Y is more than zero and less than or 18 equal to 2wt% and the content of Sn is 0.2-5wt%, or the content of Fe is 40.01-71.88wt%, the 19 content of Cu is 0.01-31.88wt%, the content of Ni is 28.1-59.97wr/o, the content of Al is more than zero and less than or equal to 4wt%, the content of Y is more than zero and less than or 21 equal to 2wV/0 and the content of Sn is 0.01-0.19wt%.
22 A preparing method of the inert alloy anode comprises the following steps:
23 melting and uniformly mixing the metals Fe, Cu and Sn, and then rapidly casting and cooling the 24 mixture to obtain the inert alloy anode;
or, melting the metals Fe, Cu and Sn at first, then adding and melting the metal Al or Y, and 26 uniformly mixing, or adding and melting the metal Al at first, then adding and melting the metal 27 Y, uniformly mixing, and rapidly casting and cooling the mixture to obtain the inert alloy anode;
22653401.2 CA Application Blakes Ref.: 11878/00003 1 or, melting and mixing the metals Fe, Cu, Ni and Sn and then casting the mixture to obtain the 2 inert alloy anode;
3 or, melting the metals Fe, Cu, Ni and Sn at first, then adding and melting the metal Al or Y, and 4 uniformly mixing, or adding and melting the metal Al at first, then adding and melting the metal Y, uniformly mixing, and casting the mixture to obtain the inert alloy anode.
6 Compared with the prior art, the inert alloy anode for aluminum electrolysis in the present 7 invention has the beneficial effects below:
8 (1) The inert alloy anode for aluminum electrolysis in the present invention contains Fe and Cu 9 as primary components, and further contains Sn. The inert alloy anode with the above components is low in cost, low in overvoltage and small in power consumption of the aluminum 11 electrolysis process; the anode material is alloy composed of Fe, Cu and Sn, so an oxide film 12 formed on the surface of the inert alloy anode in the electrolysis process is high in oxidation 13 resistance and is hardly corroded by electrolyte, and the formed oxide film is stable and not 14 liable to fall off, therefore, the inert alloy anode is imparted with quite high oxidation resistance and corrosion resistance. It is precisely because of high oxidation resistance and corrosion 16 resistance of the inert alloy anode, impurities entering into liquid aluminum, which are generated 17 by corrosion or falling off of the anode material, are avoided, so as to ensure the purity of 18 aluminum products, that is, the purity of the produced aluminum can reach 99.8%. The following 19 problems are avoided: the alloy anode in the prior art has high cost and overvoltage and large power consumption of process, the oxide film on the alloy surface is low in oxidation resistance 21 and liable to fall off, which leads to continuous consumption of the alloy anode and poor 22 corrosion resistance, furthermore, the corroded or falling oxide film enters into liquid aluminum 23 to degrade the purity of the final product aluminum.
24 (2) The inert alloy anode for aluminum electrolysis in the present invention is composed of Fe, Cu, Ni and Sn, wherein the content of Fe is 23-40wV/0, the content of Cu is 36-60wr/o, the 26 content of Ni is 14-28wt /0 and the content of Sn is 0.2-5wt%, or the content of Fe is 40.01-27 71.88wr/o, the content of Cu is 0.01-31.88wt%, the content of Ni is 28.1-59.97wt% and the 28 content of Sn is 0.01-0.19wV/0.
29 The alloy anode in the present invention contains Fe and Cu as primary components, their content proportions are high, so the material cost of the inert alloy anode is reduced, 31 meanwhile, the inert alloy anode composed of the aforementioned metal components is high in 22653401.2 CA Application Slakes Ref.: 11878/00003 1 electric conductivity and has a cell voltage as low as 3.1V to 3.4V, power consumption for 2 aluminum electrolysis is small, the power consumption for per ton of aluminum is not more than 3 11000kw-h, so the production cost of electrolytic aluminum is low. The following problems are 4 avoided: a large quantity of expensive metal materials are used in the anode material in the prior art, resulting in increase of the anode production cost; the prepared alloy anode is low in 6 electric conductivity, large in power consumption for aluminum electrolysis and increased in 7 cost, and cannot be applied to industrial production. The added metal Ni is capable of promoting 8 firmer combination among other types of metals, and the added metal Sn ensures that an oxide 9 film with high oxidization resistance, good corrosion resistance and high stability can be formed on the surface of the inert alloy anode in the electrolysis process.
11 (3) The inert alloy anode for aluminum electrolysis in the present invention is composed of Fe, 12 Cu, Ni, Sn, Al and Y, wherein the content of Fe is 23-40wr/o, the content of Cu is 36-60wr/o, the 13 content of Ni is 14-28wt%, the content of Al is more than zero and less than or equal to 4wt /0, 14 the content of Y is more than zero and less than or equal to 2wtc)/0 and the content of Sn is 0.2-5wr/o, or the content of Fe is 40.01-71.88wV/0, the content of Cu is 0.01-31.88wt 70, the content 16 of Ni is 28.1-59.97wt%, the content of Al is more than zero and less than or equal to 4w1%, the 17 content of Y is more than zero and less than or equal to 2wt% and the content of Sn is 0.01-18 0.19wt%. Similarly, the aforementioned inert alloy anode has the advantages of low material 19 cost and high electric conductivity, in addition, the metal Al contained in the aforementioned inert alloy anode plays a role of oxidization resistance and can serve as a reducing agent for 21 metallothermic reduction reaction with a metal oxide in the inert anode alloy, thus ensure the 22 percentage of the primary components in the inert alloy anode, meanwhile, the added metal Y
23 can be used for controlling a crystal structure for anode material formation in the preparation 24 process of the inert anode, achieving the anti-oxidization purpose.
(4) The inert alloy anode for aluminum electrolysis in the present invention has a melting point of 26 1360-1386 C, a specific resistivity of 68-76.8p0=cm at 20 C anb a density of 8.1-8.3g/cm3. The = 27 prepared inert alloy anode has a quite high melting point and accordingly can meet the demand 28 of aluminum electrolysis on high temperature environment; furthermore, the aforementioned 29 inert alloy anode has a quite low overvoltage, so power consumption of the aluminum electrolysis process can be reduced; the prepared inert alloy anode is even in texture and has a 31 density within a range from 8.1 g/cm3 to 8.3g/cm3, in this way, stable service property of the 32 inert alloy anode is guaranteed.
22653401.2 CA Application Blakes Ref.: 11878/00003 1 (5) The preparing method of the inert alloy anode comprises the following steps: melting and 2 uniformly mixing the metals Fe, Cu and Sn, and then rapidly casting and cooling the mixture to 3 obtain the inert alloy anode; or, melting the metals Fe, Cu and Sn at first, then adding and 4 melting the metal Al or Y, and uniformly mixing, or adding and melting the metal Al at first, then adding and melting the metal Y, uniformly mixing, and rapidly casting and cooling the mixture to 6 obtain the inert alloy anode; or, melting and mixing the metals Fe, Cu, Ni and Sn and then 7 casting the mixture to obtain the inert alloy anode; or, melting the metals Fe, Cu, Ni and Sn at 8 first, then adding and melting the metal Al or Y, and uniformly mixing, or adding and melting the 9 metal Al at first, then adding and melting the metal Y, uniformly mixing, and casting the mixture to obtain the inert alloy anode. The aforementioned inert alloy anode is simple in preparation 11 process and can be prepared in any shape according to the actual needs.
During preparation of 12 the alloy containing the metals Al and Y, Al is added at first to prevent other molten metal 13 components from being oxidized, and then, Y is added and molten to finally obtain the alloy 14 having a desired crystal form.
For more easily understanding the technical solution of the present invention, further description 16 will be made below to the technical solution of the present invention in conjunction with the 17 embodiments.
18 Detailed Description of the Embodiments 19 Embodiment 1 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks and 0.2 parts by 21 weight of Sn metal blocks are molten and then uniformly mixed under high-speed 22 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-23 100 C/s to obtain an inert alloy anode 1 which is homogeneous in texture. The inert alloy anode 24 has a density of 8.3g/cm3, a specific resistivity of 62p0=cm and a melting point of 1400 C.
Embodiment 2 26 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks and 5 parts by 27 weight of Sn metal blocks are molten and then uniformly mixed under high-speed 28 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-29 100 C/s to obtain an inert alloy anode 2 which is homogeneous in texture. The inert alloy anode has a density of 7.8g/cm3, a specific resistivity of 82pc).cm and a melting point of 1369 C.
22653401.2 CA Application Blakes Rel.: 11878/00003 1 Embodiment 3 2 30 parts by weight of Fe metal blocks, 45 parts by weight of Cu metal blocks and 3 parts by 3 weight of Sn metal blocks are molten and then uniformly mixed under high-speed 4 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-100 C/s to obtain an inert alloy anode 3 which is homogeneous in texture. The inert alloy anode 6 has a density of 7.9g/cm3, a specific resistivity of 86pQ=cm and a melting point of 1390 C.
7 Embodiment 4 8 30 parts by weight of Fe metal blocks, 50 parts by weight of Cu metal blocks, 20 parts by weight =
9 of Mo and 5 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 4. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 78pQ=cm and a 11 melting point of 1370 C.
12 Embodiment 5 13 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks, 14 parts by weight 14 of Ni and 3 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 5. The inert alloy anode has a density of 8.3g/cm3, a specific resistivity of 68pD=cm and a 16 melting point of 1360 C.
17 Embodiment 6 18 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks, 19 parts by weight 19 of Ni and 5 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 6. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 76.8pD=cm and 21 a melting point of 1386 C.
22 Embodiment 7 23 25 parts by weight of Fe metal blocks, 46.8 parts by weight of Cu metal blocks, 28 parts by 24 weight of Ni and 0.2 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 7. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 26 72pQ=cm and a melting point of 1350 C.
27 Embodiment 8 28 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks, 14 parts by weight 29 of Ni and 3 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy anode 8. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 70pQ=cm and a 31 melting point of 1330 C.
22653401.2 8 =
CA Application Blakes Ref.: 11878/00003 1 Embodiment 9 2 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks, 19 parts by weight 3 of Ni and 5 parts by weight of Sn metal blocks are molten and then cast to obtain an inert alloy 4 anode 9. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 73p0-cm and a melting point of 1340 C.
6 Embodiment 10 7 24 parts by weight of Fe metal blocks, 47.8 parts by weight of Cu metal blocks, 28 parts by 8 weight of Ni and 0.2 parts by weight of Sn metal blocks are molten and then cast to obtain an 9 inert alloy anode 10. The inert alloy anode has a density of 8.0g/cm3, a specific resistivity of 74p0=cm and a melting point of 1350 C.
11 Embodiment 11 12 30 parts by weight of Fe metal blocks, 41 parts by weight of Cu metal blocks and 5 parts by 13 weight of Sn metal blocks are molten at first, then 3 parts by weight of Al metal blocks are 14 added and sequentially molten, uniform mixing is performed under high-speed electromagnet stirring, and the mixture is rapidly cast and then rapidly cooled to obtain an inert alloy anode 11.
16 The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 68p0=cm and a melting 17 point of 1370 C.
18 Embodiment 12 19 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks, 14 parts by weight of Ni and 0.2 parts by weight of Sn metal blocks are molten at first, then 2.8 parts by weight of 21 Al metal blocks are added and sequentially molten, and an inert alloy anode 12 is obtained by 22 casting. The inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 69pQ=cm and a 23 melting point of 1340 C.
24 Embodiment 13 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks, 15 parts by weight 26 of Ni and 5 parts by weight of Sn metal blocks are molten at first, then 4 parts by weight of Al 27 metal blocks are added and sequentially molten, and an inert alloy anode 13 is obtained by 28 casting. The inert alloy anode has a density of 8.15g/cm3, a specific resistivity of 69p0=cm and a 29 melting point of 1369 C.
22653401.2 9 CA Application Blakes Ref.: 11878/00003 1 Embodiment 14 2 36 parts by weight of Fe metal blocks, 47 parts by weight of Cu metal blocks, 14 parts by weight = 3 of Ni and 2.9 parts by weight of Sn metal blocks are molten at first, then 0.1 parts by weight of 4 Al metal blocks are added and sequentially molten, and an inert alloy anode 14 is obtained by casting. The inert alloy anode has a density of 8.0g/cm3, a specific resistivity of 67.6pQ=cm and 6 a melting point of 1379 C.
7 Embodiment 15 8 27 parts by weight of Fe metal blocks, 50 parts by weight of Cu metal blocks and 4 parts by 9 weight of Sn metal blocks are molten at first, then 1 part by weight of Y
metal blocks are added and sequentially molten, uniform mixing is performed under high-speed electromagnet stirring, 11 and the mixture is rapidly cast and then rapidly cooled to obtain an inert alloy anode 15. The 12 inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 6.7p0-cm and a melting point 13 of 1358 C.
14 Embodiment 16 35 parts by weight of Fe metal blocks, 45 parts by weight of Cu metal blocks, 24 parts by weight 16 of Ni and 4 parts by weight of Sn metal blocks are molten at first, then 2 parts by weight of Y
17 metal blocks are added and sequentially molten, and an inert alloy anode 16 is obtained by 18 casting. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 70.9p0=cm and 19 a melting point of 1375 C.
Embodiment 17 21 25 parts by weight of Fe metal blocks, 50 parts by weight of Cu metal blocks and 4 parts by 22 weight of Sn metal blocks are molten at first, then 3 parts by weight of Al metal blocks are 23 added and sequentially molten, finally, 1 part by weight of Y metal blocks are added and molten, 24 uniform mixing is performed under high-speed electromagnet stirring, and the mixture is rapidly cast and then rapidly cooled to obtain an inert alloy anode 17. The inert alloy anode has a 26 density of 8.3g/cm3, a specific resistivity of 68.9pQ=cm and a melting point of 1381 C.
27 Embodiment 18 28 23 parts by weight of Fe metal blocks, 60 parts by weight of Cu metal blocks, 14 parts by weight 29 of Ni and 0.9 parts by weight of Sn metal blocks are molten at first, then 0.1 parts by weight of Al metal blocks are added and sequentially molten, finally, 2 parts by weight of Y metal blocks 31 are added and molten, mixing is performed, and the mixture is cast to obtain an inert alloy 22653401.2 10 CA Application Blakes Ref.: 11878/00003 1 anode 18. The inert alloy anode has a density of 8.3g/cm3, a specific resistivity of 68p0=cm and 2 a melting point of 1360 C.
3 Embodiment 19 4 40 parts by weight of Fe metal blocks, 36 parts by weight of Cu metal blocks, 14.9 parts by weight of Ni and 5 parts by weight of Sn metal blocks are molten at first, then 4 parts by weight 6 of Al metal blocks are added and sequentially molten, finally, 0.1 parts by weight of Y metal 7 blocks are added and molten, mixing is performed, and the mixture is cast to obtain an inert 8 alloy anode 19. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 9 76.8p0=cm and a melting point of 1386 C.
Embodiment 20 11 29 parts by weight of Fe metal blocks, 38.3 parts by weight of Cu metal blocks, 28 parts by 12 weight of Ni and 0.2 parts by weight of Sn metal blocks are molten at first, then 3.5 parts by 13 weight of Al metal blocks are added and sequentially molten, finally, 1 part by weight of Y metal 14 blocks are added and molten, mixing is performed, and the mixture is cast to obtain an inert alloy anode 20. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 70p0=cm 16 and a melting point of 1365 C.
17 Embodiment 21 18 40 parts by weight of Fe metal blocks, 36.5 parts by weight of Cu metal blocks, 18 parts by 19 weight of Ni and 3 parts by weight of Sn metal blocks are molten at first, then 1.5 parts by weight of Al metal blocks are added and sequentially molten, finally, 1 part by weight of Y metal 21 blocks are added and molten, mixing is performed, and the mixture is cast to obtain an inert 22 alloy anode 21. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 23 76.8p0-cm and a melting point of 1386 C.
24 Embodiment 22 24.3 parts by weight of Fe metal blocks, 59 parts by weight of Cu metal blocks, 14 parts by 26 weight of Ni. and 0.2 parts by weight of Sn metal blocks are molten at first, then 2 parts by 27 weight of Al metal blocks are added and sequentially molten, finally, 0.5 parts by weight of Y
28 metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 29 inert alloy anode 22. The inert alloy anode has a density of 8.22g/cm3, a specific resistivity of 68.2p0=cm and a melting point of 1360 C.
22653401.2 CA Application Blakes Ref.: 11878/00003 1 In the aforementioned embodiment, 1 part by weight is 10g, and the inert anode alloy resulted 2 from casting can be in any shape as required.
3 Embodiment 23 4 40.01 parts by weight of Fe metal blocks, 35.9 parts by weight of Cu metal blocks and 0.19 parts by weight of Sn metal blocks are molten and then uniformly mixed under high-speed 6 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-7 100 C/s to obtain an inert alloy anode 23 which is homogeneous in texture. The inert alloy 8 anode has a density of 8.2g/cm3, a specific resistivity of 61pQ=cm and a melting point of 9 1400 C.
= 10 Embodiment 24 11 80 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks and 0.01 parts by 12 weight of Sn metal blocks are molten and then uniformly mixed under high-speed 13 electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-14 100 C/s to obtain an inert alloy anode 24 which is homogeneous in texture. The inert alloy anode has a density of 7.5g/cm3, a specific resistivity of 82pQ=cm and a melting point of 16 1369 C.
17 Embodiment 25 18 60 parts by weight of Fe metal blocks, 25 parts by weight of Cu metal blocks and 0. 1 part by 19 weight of Sn metal blocks are molten and then uniformly mixed under high-speed electromagnetic stirring, the mixture is rapidly cast and then rapidly cooled at a speed of 20-21 100 C/s to obtain an inert alloy anode 25 which is homogeneous in texture. The inert alloy 22 anode has a density of 7.9g/cm3, a specific resistivity of 84pD=cm and a melting point of 23 1390 C.
24 Embodiment 26 50 parts by weight of Fe metal blocks, 30 parts by weight of Cu metal blocks, 20 parts by weight 26 of Mo and 0.05 parts by weight of Sn metal blocks are molten and then cast to obtain an inert 27 alloy anode 26. The inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 78pD=cm 28 and a melting point of 1370 C.
= 29 Embodiment 27 40.01 parts by weight of Fe metal blocks, 35.9 parts by weight of Cu metal blocks, 70 parts by 31 weight of Ni and 0.01 parts by weight of Sn metal blocks are molten and then cast to obtain an 22653401.2 CA Application Blakes Ref.: 11878/00003 1 inert alloy anode 27. The inert alloy anode has a density of 8.5g/cm3, a specific resistivity of 2 68p0=cm and a melting point of 1360 C.
3 Embodiment 28 4 80 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks, 28.1 parts by weight of Ni and 0.19 parts by weight of Sn metal blocks are molten and then cast to obtain an 6 inert alloy anode 28. The inert alloy anode has a density of 7.7g/cm3, a specific resistivity of 7 76.8p0=cm and a melting point of 1386 C.
8 Embodiment 29 9 71.88 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks, 28.1 parts by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten and then cast to obtain an 11 inert alloy anode 29. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 12 72p0=cm and a melting point of 1350 C.
13 Embodiment 30 14 40.01 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks, 28.1 parts by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten and then cast to obtain 16 an inert alloy anode 30. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 17 70p0=cm and a melting point of 1330 C.
18 Embodiment 31 19 40 parts by weight of Fe metal blocks, 0.02 parts by weight of Cu metal blocks, 59.97 parts by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten and then cast to obtain an 21 inert alloy anode 31. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 22 731J0=cm and a melting point of 1340 C.
23 Embodiment 32 24 45 parts by weight of Fe metal blocks, 4.81 parts by weight of Cu metal blocks, 50 parts by weight of Ni and 0.19 parts by weight of Sn metal blocks are molten and then cast to obtain an 26 inert alloy anode 32. The inert alloy anode has a density of 8.0g/cm3, a specific resistivity of 27 74p0=cm and a melting point of 1350 C.
28 Embodiment 33 29 60 parts by weight of Fe metal blocks, 35.9 parts by weight of Cu metal blocks and 0.1 parts by weight of Sn metal blocks are molten at first, then 4 parts by weight of Al metal blocks are 22653401.2 CA Application Blakes Ref.: 11878/00003 1 added and sequentially molten, uniformly mixing is performed under high-speed 2 electromagnetic stirring, and the mixture is rapidly cast and then rapidly cooled to obtain an inert 3 alloy anode 33. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 68p0=cm 4 and a melting point of 1370 C.
Embodiment 34 6 40.01 parts by weight of Fe metal blocks, 27.7 parts by weight of Cu metal blocks, 28.1 parts by 7 weight of Ni and 0.19 parts by weight of Sn metal blocks are molten at first, then 4 parts by 8 weight of Al metal blocks are added and sequentially molten, and an inert alloy anode 34 is 9 obtained by casting. The inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 69p0=cm and a melting point of 1340 C.
11 Embodiment 35 12 71.88 parts by weight of Fe metal blocks, 0.005 parts by weight of Cu metal blocks, 28.1 parts 13 by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten at first, then 0.005 parts 14 by weight of Al metal blocks are added and sequentially molten, and an inert alloy anode 35 is obtained by casting. The inert alloy anode has a density of 8.15g/cm3, a specific resistivity of 16 69pQ=cm and a melting point of 1369 C.
17 Embodiment 36 18 40.01 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks, 25.01 parts 19 by weight of Ni and 0.1 parts by weight of Sn metal blocks are molten at first, then 3 parts by weight of Al metal blocks are added and sequentially molten, and an inert alloy anode 36 is 21 obtained by casting. The inert alloy anode has a density of 8.0g/cm3, a specific resistivity of 22 67.6pQ=cm and a melting point of 1379 C.
23 Embodiment 37 24 66 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks and 0.01 parts by weight of Sn metal blocks are molten at first, then 2 parts by weight of Y
metal blocks are 26 added and sequentially molten, uniformly mixing is performed under high-speed 27 electromagnetic stirring, and the mixture is rapidly cast and then rapidly cooled to obtain an inert 28 alloy anode 37. The inert alloy anode has a density of 8.4g/cm3, a specific resistivity of 67p0..cm 29 and a melting point of 1358 C.
22653401.2 CA Application Blakes Ref.: 11878/00003 1 Embodiment 38 2 40 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks, 59.97 parts by 3 weight of Ni and 0.01 parts by weight of Sn metal blocks are molten at first, then 0.01 parts by 4 weight of Y metal blocks are added and sequentially molten, and an inert alloy anode 38 is obtained by casting. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 4. 6 70.9p0=cm and a melting point of 1375 C.
7 Embodiment 39 8 62 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks and 0.19 parts 9 by weight of Sn metal blocks are molten at first, then, 4 parts by weight of Al metal blocks are added and sequentially molten, finally, 2 parts by weight of Y metal blocks are added and 11 molten, uniform mixing is performed under high-speed electromagnet stirring, and the mixture is 12 rapidly cast and then rapidly cooled to obtain an inert alloy anode 39.
The inert alloy anode has 13 a density of 8.3g/cm3, a specific resistivity of 68.9pO=cm and a melting point of 1381 C.
14 Embodiment 40 40 parts by weight of Fe metal blocks, 25.7 parts by weight of Cu metal blocks, 28.1 parts by 16 weight of Ni and 0.19 parts by weight of Sn metal blocks are molten at first, then 4 parts by 17 weight of Al metal blocks are added and sequentially molten, finally, 2 parts by weight of Y
18 metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 19 inert alloy anode 40. The inert alloy anode has a density of 8.3g/cm3, a specific resistivity of 68p0=cm and a melting point of 1360 C.
21 Embodiment 41 22 71.88 parts by weight of Fe metal blocks, 0.005 parts by weight of Cu metal blocks, 28.1 parts 23 by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten at first, then, 0.002 parts 24 by weight of Al metal blocks are added and sequentially molten, finally, 0.003 parts by weight of Y metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 26 inert alloy anode 41. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 27 76.8p0=cm and a melting point of 1386 C.
28 Embodiment 42 29 36.92 parts by weight of Fe metal blocks, 31.88 parts by weight of Cu metal blocks, 28.1 parts by weight of Ni and 0.1 parts by weight of Sn metal blocks are molten at first, then 1 part by 31 weight of Al metal blocks are added and sequentially molten, finally, 2 parts by weight of Y
22653401.2 CA Application Blakes Ref.: 11878/00003 1 metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 2 inert alloy anode 42. The inert alloy anode has a density of 8.2g/cm3, a specific resistivity of 3 70pQ=cm and a melting point of 1365 C.
4 Embodiment 43 39.81 parts by weight of Fe metal blocks, 0.01 parts by weight of Cu metal blocks, 59.97 parts 6 by weight of Ni and 0.01 parts by weight of Sn metal blocks are molten at first, then 0.1 parts by 7 weight of Al metal blocks are added and sequentially molten, finally, 0.1 parts by weight of Y
8 metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an 9 inert alloy anode 43. The inert alloy anode has a density of 8.1g/cm3, a specific resistivity of 76.8p0=cm and a melting point of 1386 C.
11 Embodiment 44 12 45 parts by weight of Fe metal blocks, 24.4 parts by weight of Cu metal blocks, 29 parts by 13 weight of Ni and 0.1 parts by weight of Sn metal blocks are molten at first, then 1 part by weight 14 of Al metal blocks are added and sequentially molten, finally, 0.5 parts by weight of Y metal blocks are added and molten, mixing is performed, and the mixture is cast to obtain an inert 16 alloy anode 44. The inert alloy anode has a density of 8.22g/cm3, a specific resistivity of 17 68.2pQ=cm and a melting point of 1360 C.
18 In the aforementioned embodiments 23-44, 1 part by weight is 100g, and the inert anode alloy 19 resulted from casting can be in any shape as required.
Comparative Example 21 The alloy powders containing 37wt /0 of Co, 18wt /0 of Cu, 19wt% of Ni, 23wt /0 of Fe and 3wt /0 22 of Ag are subjected to powder metallurgic process to obtain an anode, and before use, an oxide 23 film is formed on the surface of the metal anode by pre-oxidization at 1000 C to obtain an inert 24 alloy anode A.
Test Example 26 The inert alloy anodes 1-44 and A are each taken as an anode, graphite is taken as a cathode, 27 the anode and the cathode are vertically inserted into an electrolytic cell provided with a 28 corundum liner, and the distance between the anode and the cathode is 3cm. The anode has a 29 current density of 1.0A/cm2 at 760 C, and is electrolyzed for up to 40 hours in an electrolyte having the components including 32wt% of sodium fluoride, 57wt /0 of aluminum fluoride, 3wt /0 22653401.2 CA Application Blakes Ref.: 11878/00003 1 of lithium fluoride, 4wr/0 of potassium fluoride and 4wt 70 of alumina, and the test results are 2 shown in the Table below:
Direct Current Consumption for Per Purity of Product Inert Alloy Anode Cell Voltage (V) Ton of Aluminum Aluminum (%) (kw.h) 1 3.10 10040 99.80 2 3.14 10170 99.81 3 3.22 10429 99.85 4 3.16 10235 99.80 3.10 10040 99.85 6 3.39 10979 99.82 7 3.15 10202 99.85 8 3.27 10591 99.85 9 3.18 10299 99.83 3.36 10882 99.81 11 3.28 10623 99.80 12 3.40 11000 99.82 13 3.32 10753 99.84 14 3.25 10526 99.82 3.12 10105 99.80 16 3.27 10591 99.81 17 3.35 10850 99.83 18 3.38 10947 99.80 19 3.16 10234 99.82 3.32 10753 99.83 21 3.10 10040 99.81 22 3.12 10105 99.82 23 3.11 10040 99.80 24 3.13 10159 99.81 3.21 10429 99.85 22653401.2 CA Application Blakes Ref.: 11878/00003 26 3.15 10236 99.80 27 3.11 10041 99.90 28 3.38 10979 99.82 29 3.14 10202 99.85 30 3.26 10591 99.91 31 3.17 10299 99.83 32 3.35 10879 99.81 33 3.27 10623 99.80 34 3.39 11000 99.82 35 3.33 10753 99.84 36 3.25 10526 99.82 37 3.12 10105 99.80 38 3.27 10591 99.81 39 3.35 10850 99.83 40 3.38 10945 99.80 41 3.16 10234 99.82 42 3.32 10753 99.83 43 3.10 10040 99.81 44 3.12 10110 99.82 A 4.48 14510 98.35 2 It can be seen from the test results of the aforementioned embodiments and the comparative 3 example that in the process of aluminum electrolysis, the inert alloy anode in the present 4 invention has a cell voltage much lower than that of the alloy anode in the comparative example, consequently, using the inert alloy anode in the present invention can reduce the power 6 consumption in an aluminum electrolysis process remarkably, which further reduces energy 7 waste and lower cost. Meanwhile, the inert alloy anode in the present invention can be used for 8 producing aluminum products which meet the high-purity standard, i.e. the purity of these 9 aluminum products can be over 99.8, which meets the national primary aluminum standard.
Detailed description has been made to the specific contents of the present invention in the 11 aforementioned embodiments, and it should be understood by those skilled in this art that 22653401.2 CA Application Blakes Ref.: 11878/00003 1 modifications and detail variations in any form based upon the present invention pertain to the 2 scope that the present invention seeks to protect.
22653401.2
Claims (5)
1. An inert alloy anode for aluminum electrolysis, being composed of Fe, Cu, Ni and Sn, wherein the content of Fe is 23-40wt%, the content of Cu is 36-60wt%, the content of Ni is 14-28wt% and the content of Sn is 0.2-5wt%, or the content of Fe is 40.01-71.88wt%, the content of Cu is 0.01-31.88wt%, the content of Ni is 28.1-59.97wt% and the content of Sn is 0.01-0.19wt%.
2. The inert alloy anode according to claim 1, being composed of Fe, Cu, Ni, Sn and Al, wherein the content of Fe is 23-40wt%, the content of Cu is 36-60wt%, the content of Ni is 14-28wt%, the content of Al is more than zero and less than or equal to 4wt% and the content of Sn is 0.2-5wt%, or the content of Fe is 40.01-71.88wt%, the content of Cu is 0.01-31.88wt%, the content of Ni is 28.1-59.97wt%, the content of Al is more than zero and less than or equal to 4wt% and the content of Sn is 0.01-0.19wt%.
3. The inert alloy anode according to claim 2, being composed of Fe, Cu, Ni, Sn, Al and Y, wherein the content of Fe is 23-40wt%, the content of Cu is 36-60wt%, the content of Ni is 14-28wt%, the content of Al is more than zero and less than or equal to 4wt%, the content of Y is more than zero and less than or equal to 2wt% and the content of Sn is 0.2-5wt%, or the content of Fe is 40.01-71.88wt%, the content of Cu is 0.01-31.88wt%, the content of Ni is 28.1-59.97wt%, the content of Al is more than zero and less than or equal to 4wt%, the content of Y is more than zero and less than or equal to 2wt% and the content of Sn is 0.01-0.19wt%.
4. A preparing method of the inert alloy anode according to claim 1, comprising the following steps:
melting and mixing the metals Fe, Cu, Ni and Sn and then casting the mixture to obtain the inert alloy anode.
melting and mixing the metals Fe, Cu, Ni and Sn and then casting the mixture to obtain the inert alloy anode.
5. A preparing method of the inert alloy anode according to claim 2 or 3, comprising the following steps:
melting the metals Fe, Cu, Ni and Sn at a ratio according to claim 2 or 3 at first, then adding and melting the metal Al or Y at a ratio according to claim 2 or 3, and uniformly mixing, or adding and melting the metal Al at a ratio according to claim 3 at first, then adding and melting the metal Y at a ratio according to claim 3, uniformly mixing, and casting the mixture to obtain the inert alloy anode.
melting the metals Fe, Cu, Ni and Sn at a ratio according to claim 2 or 3 at first, then adding and melting the metal Al or Y at a ratio according to claim 2 or 3, and uniformly mixing, or adding and melting the metal Al at a ratio according to claim 3 at first, then adding and melting the metal Y at a ratio according to claim 3, uniformly mixing, and casting the mixture to obtain the inert alloy anode.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210188424.6 | 2012-06-11 | ||
| CN201210188424.6A CN103484895B (en) | 2012-06-11 | 2012-06-11 | A kind of electrolgtic aluminium inert alloy anode and preparation method thereof |
| CN201310024019.5A CN103938080B (en) | 2013-01-23 | 2013-01-23 | Electrolgtic aluminium inert alloy anode and preparation method thereof |
| CN201310024019.5 | 2013-01-23 | ||
| PCT/CN2013/076441 WO2013185539A1 (en) | 2012-06-11 | 2013-05-30 | Inert alloy anode used for aluminum electrolysis and preparation method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2876336A1 CA2876336A1 (en) | 2013-12-19 |
| CA2876336C true CA2876336C (en) | 2017-03-14 |
Family
ID=49757499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2876336A Expired - Fee Related CA2876336C (en) | 2012-06-11 | 2013-05-30 | Inert alloy anode for aluminum electrolysis and preparing method thereof |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20150159287A1 (en) |
| EP (1) | EP2860291B1 (en) |
| KR (1) | KR20150022994A (en) |
| AP (1) | AP2015008186A0 (en) |
| AU (1) | AU2013275996B2 (en) |
| CA (1) | CA2876336C (en) |
| EA (1) | EA030951B1 (en) |
| IN (1) | IN2015DN00217A (en) |
| WO (1) | WO2013185539A1 (en) |
| ZA (1) | ZA201409511B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104073704B (en) * | 2014-06-27 | 2016-06-22 | 中国铝业股份有限公司 | A kind of Cu-Ni-Fe base alloy inert anode material and heat treatment method thereof |
| EP3839084A1 (en) * | 2019-12-20 | 2021-06-23 | David Jarvis | Metal alloy |
| RU2727384C1 (en) * | 2019-12-23 | 2020-07-21 | Михаил Константинович Кулеш | Thermochemically stable anode for aluminum electrolysis |
| RU2734512C1 (en) * | 2020-06-09 | 2020-10-19 | Михаил Константинович Кулеш | Thermochemically stable anode for aluminum electrolysis |
| CN113337849B (en) * | 2021-06-10 | 2022-09-30 | 中南大学 | Aluminum electrolysis metal ceramic inert anode and near-net-shape preparation method thereof |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4620905A (en) * | 1985-04-25 | 1986-11-04 | Aluminum Company Of America | Electrolytic production of metals using a resistant anode |
| US5904828A (en) * | 1995-09-27 | 1999-05-18 | Moltech Invent S.A. | Stable anodes for aluminium production cells |
| CA2269727A1 (en) * | 1996-09-23 | 1998-03-26 | Jainagesh A. Sekhar | Ultrastable anodes for aluminum production cells |
| US6361680B1 (en) * | 1997-09-23 | 2002-03-26 | Moltech Invent S-A. | Ultrastable cell component for aluminum production cells and method |
| US20050194066A1 (en) * | 1999-12-09 | 2005-09-08 | Jean-Jacques Duruz | Metal-based anodes for aluminium electrowinning cells |
| US6419812B1 (en) * | 2000-11-27 | 2002-07-16 | Northwest Aluminum Technologies | Aluminum low temperature smelting cell metal collection |
| AU2002355498A1 (en) * | 2001-08-06 | 2003-02-24 | Moltech Invent S.A. | Aluminium production cells with iron-based metal alloy anodes |
| DE60302046T2 (en) * | 2002-03-15 | 2006-07-27 | Moltech Invent S.A. | SUBSTANTIALLY OXIDIZED NICKEL IRON ANODES FOR THE MANUFACTURE OF ALUMINUM |
| CN1203217C (en) | 2003-04-18 | 2005-05-25 | 石忠宁 | Metal base aluminium electrolytic inert anode and its preparation method |
| US20070278107A1 (en) * | 2006-05-30 | 2007-12-06 | Northwest Aluminum Technologies | Anode for use in aluminum producing electrolytic cell |
| CN101824631B (en) * | 2009-03-02 | 2011-12-28 | 北京有色金属研究总院 | Composite alloy inert anode for aluminum electrolysis and aluminum electrolysis method utilizing same |
| CN101717969A (en) * | 2009-12-18 | 2010-06-02 | 中国铝业股份有限公司 | Alloy material suitable for inert anode of metal fused-salt electrolysis cell |
| CN102011144A (en) * | 2010-12-15 | 2011-04-13 | 中国铝业股份有限公司 | Nickel-based alloy material suitable for inert anode of metal molten salt electrolyzer |
| CN102230189A (en) | 2011-06-14 | 2011-11-02 | 贵州大学 | Nanometer metal ceramic inertia anode material for electrolytic aluminum and preparation method thereof |
-
2013
- 2013-05-30 AP AP2015008186A patent/AP2015008186A0/en unknown
- 2013-05-30 WO PCT/CN2013/076441 patent/WO2013185539A1/en active Application Filing
- 2013-05-30 AU AU2013275996A patent/AU2013275996B2/en not_active Ceased
- 2013-05-30 EP EP13803425.1A patent/EP2860291B1/en active Active
- 2013-05-30 US US14/407,292 patent/US20150159287A1/en not_active Abandoned
- 2013-05-30 KR KR1020157000520A patent/KR20150022994A/en not_active Application Discontinuation
- 2013-05-30 EA EA201492227A patent/EA030951B1/en not_active IP Right Cessation
- 2013-05-30 CA CA2876336A patent/CA2876336C/en not_active Expired - Fee Related
- 2013-05-30 IN IN217DEN2015 patent/IN2015DN00217A/en unknown
-
2014
- 2014-12-23 ZA ZA2014/09511A patent/ZA201409511B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EA030951B1 (en) | 2018-10-31 |
| AU2013275996A1 (en) | 2015-01-22 |
| IN2015DN00217A (en) | 2015-06-12 |
| AP2015008186A0 (en) | 2015-01-31 |
| AU2013275996B2 (en) | 2016-10-27 |
| ZA201409511B (en) | 2016-08-31 |
| EA201492227A1 (en) | 2015-05-29 |
| EP2860291A4 (en) | 2015-12-09 |
| WO2013185539A1 (en) | 2013-12-19 |
| KR20150022994A (en) | 2015-03-04 |
| EP2860291B1 (en) | 2020-01-08 |
| CA2876336A1 (en) | 2013-12-19 |
| EP2860291A1 (en) | 2015-04-15 |
| US20150159287A1 (en) | 2015-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2877591C (en) | Electrolytic cell for aluminum electrolysis and electrolysis process using electrolytic cell | |
| CA2876336C (en) | Inert alloy anode for aluminum electrolysis and preparing method thereof | |
| US4871437A (en) | Cermet anode with continuously dispersed alloy phase and process for making | |
| CN101949038B (en) | Method for preparing TiCxOy composite anode with electrolysis method | |
| CN102140656A (en) | Method for preparing Dy-Fe alloy through oxide molten salt electrolysis | |
| CN104357880A (en) | Method for preparing copper-lithium mother alloy by self-consuming cathode fused salt electrolysis | |
| CN103484895B (en) | A kind of electrolgtic aluminium inert alloy anode and preparation method thereof | |
| JPH03140491A (en) | Rare earth metal and production of rare earth alloy | |
| RU2415973C2 (en) | Procedure for production of aluminium by electrolysis of melt | |
| CN102912382B (en) | A kind of method of electrolytic preparation aluminium-magnesium alloy in fluorochloride molten salt system | |
| RU2401324C2 (en) | Inert anode to electrolytic production of metals | |
| CN105803490A (en) | Electrolyte composition used for aluminum electrolysis | |
| OA17186A (en) | Inert alloy anode used for aluminum electrolysis and preparation method therefor. | |
| CN103938080B (en) | Electrolgtic aluminium inert alloy anode and preparation method thereof | |
| CN112267131B (en) | Yttrium-nickel alloy and preparation method and application thereof | |
| JP2004360025A (en) | Method for manufacturing metallic titanium with direct electrolysis method | |
| CN101935853A (en) | Alloy oxygen evolution anode for aluminum electrolysis | |
| CN108456897B (en) | Aluminum source for electrolytic preparation of aluminum alloy containing aluminum alloy, preparation method and method for preparing aluminum alloy containing aluminum alloy using the same | |
| CN116265617A (en) | A kind of method that molten salt electrolysis prepares metal hafnium | |
| JPS63166987A (en) | Production of rare-earth metal | |
| Shi et al. | Polarization corrosion of the iron-nickel alloy in Na 3 AlF 6-based system molten salts | |
| CN107130263A (en) | The preparation method of magnesium metal | |
| AU2804689A (en) | Cermet anode with continuously dispersed alloy phase and process for making |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20141211 |
|
| MKLA | Lapsed |
Effective date: 20210531 |