CN113106282A - Low-iron low-silicon aluminum liquid and preparation method and application thereof - Google Patents
Low-iron low-silicon aluminum liquid and preparation method and application thereof Download PDFInfo
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- CN113106282A CN113106282A CN202110383009.5A CN202110383009A CN113106282A CN 113106282 A CN113106282 A CN 113106282A CN 202110383009 A CN202110383009 A CN 202110383009A CN 113106282 A CN113106282 A CN 113106282A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000007788 liquid Substances 0.000 title claims abstract description 52
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 86
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims abstract description 39
- 238000007670 refining Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 229910021538 borax Inorganic materials 0.000 claims abstract description 32
- 239000004328 sodium tetraborate Substances 0.000 claims abstract description 32
- 235000010339 sodium tetraborate Nutrition 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000000155 melt Substances 0.000 claims abstract description 25
- RKFMOTBTFHXWCM-UHFFFAOYSA-M [AlH2]O Chemical compound [AlH2]O RKFMOTBTFHXWCM-UHFFFAOYSA-M 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 15
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000005303 weighing Methods 0.000 claims abstract description 14
- 239000011888 foil Substances 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 9
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical group [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical group [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 2
- 238000009616 inductively coupled plasma Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 abstract description 6
- 238000004220 aggregation Methods 0.000 abstract description 5
- 230000002776 aggregation Effects 0.000 abstract description 5
- 238000001556 precipitation Methods 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 5
- 238000005275 alloying Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a low-iron low-silicon aluminum liquid and a preparation method and application thereof, relating to a method for removing impurities in the technical field of metal materials, comprising the following steps: putting the lower turbid liquid into an oven for drying for 9h, grinding, pouring clarified causticized section aluminum liquid into a beaker, heating to 92-100 ℃, then weighing polynuclear polymeric hydroxyl aluminum obtained by polynuclear polymeric hydroxyl according to the mass-volume concentration of 2-13g/L of the polynuclear polymeric hydroxyl aluminum and the aluminum liquid, adding the polynuclear polymeric hydroxyl aluminum into the aluminum solution, stirring for reaction for 4-9min, filtering, grinding the refining agent and the borax respectively, weighing 0.1-0.2% of the refining agent and 0.3-0.9% of the borax according to the mass percentage of the aluminum alloy to be treated, wrapping the refining agent and the borax respectively by using aluminum foil paper, putting the aluminum solution into the oven, heating to 210-240 ℃, preserving heat for 4-5h, pressing the refining agent into the aluminum solution by using a bell jar, preserving heat for 6-12min, removing slag, pressing the borax into the aluminum solution, and removing slag after the reaction is finished; keeping the temperature and standing for 40-80min, capturing the aggregation and precipitation of iron elements in the melt, and having good iron removal effect and high efficiency.
Description
Technical Field
The invention relates to a method for removing impurities in the technical field of metal materials, in particular to a low-iron low-silicon aluminum liquid and a preparation method and application thereof.
Background
In recent years, with the increasing use of aluminum alloys, the requirements for the properties thereof have been increasing. Generally, the performance of aluminum materials is improved by heat treatment, alloying and other methods, but the extent of improvement of the performance of aluminum materials by these methods is limited, and the main reason is limited by the performance index of the initial aluminum material, so that it is difficult to further improve the performance index of the initial aluminum material and remove the influence of harmful impurities. The harmfulness of the impure element iron in aluminum alloys, whether it be for cast or wrought aluminum alloys, is well known. The iron element in the aluminum alloy is mainly from the industrial process of aluminum smelting and iron tools in the industrial smelting and casting process, and in addition, the recycling of waste aluminum is also an important source of iron element pollution. These iron elements often form iron-rich phases such as Al3Fe, Al5FeSi, Al12Fe3Si, Al9Fe2Si2, etc. with other elements in the aluminum alloy, which have severe cracking effects with respect to the aluminum matrix, thereby greatly reducing the performance of the aluminum alloy.
At present, the methods for removing impurity iron in aluminum alloy mainly include gravity settling method, centrifugal removal method, electromagnetic separation method and the like. In both gravity settling method, centrifugal removal method and electromagnetic separation method, an iron-rich phase having a high melting point is formed by adding an alloy element (Mn, Cr or the like) to an aluminum melt, and the iron-rich phase is separated from the aluminum melt and aggregated under the action of gravity, centrifugal force or electromagnetic force by utilizing the difference in density and conductivity between the iron-rich phase and the aluminum melt, thereby removing the iron-rich phase. However, the use of these methods is greatly affected by the critical iron content, the addition amount of alloying elements, the treatment temperature, the standing time and other factors, the process is complicated, and in addition, the added alloying elements are impurities, and if the amount is excessive, the performance of the alloy is greatly reduced. Therefore, the existing iron removing method can not meet the requirement of industrial development, and an effective iron removing method is urgently needed to make up for the defect, so that the problem caused by impurity iron in the aluminum alloy is fundamentally solved
Disclosure of Invention
The invention aims to provide a low-iron low-silicon aluminum liquid, a preparation method and application thereof, which are convenient to use, low in cost, simple in operation process, easy to control, capable of strongly and rapidly reacting in a regenerated aluminum melt, capturing the aggregation and precipitation of iron elements in the melt, good in iron removal effect and high in efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
1) preparation of aluminum solution
A. Putting the aluminum material into a crucible for heating and melting, and heating to 720-740 ℃ to obtain a melt;
B. adding a slag removing agent into the molten liquid and uniformly stirring;
C. removing scum;
d, continuously introducing inert gas into the melt while stirring the melt by using a stirrer, and adding a refining agent with the mass percent of 0.1-0.2% into the melt;
E. stopping stirring after the stirring time of the stirrer reaches a first preset time, and removing scum;
F. heating the molten liquid to 730 +/-10 ℃, and standing according to a second preset time to obtain the final molten aluminum;
2) preparation of Polynuclear polymeric hydroxyl groups
Dissolving aluminum salt in water, stirring to obtain solution, slowly adding sodium hydroxide solid particles until pH is adjusted to 4.5-7.5, standing for 4-8h, pouring out supernatant, drying the turbid solution in an oven for 9h, and grinding;
3) silicon removal of multi-core polymeric hydroxyl aluminum liquid
Pouring the clarified causticized section aluminum liquid into a beaker, heating to 92-100 ℃, then weighing polynuclear polymeric hydroxyl aluminum obtained by polynuclear polymeric hydroxyl according to the mass-volume concentration of 2-13g/L of the polynuclear polymeric hydroxyl aluminum and the aluminum liquid, adding the polynuclear polymeric hydroxyl aluminum into an aluminum solution, stirring for reaction for 4-9min, and filtering;
4) respectively grinding a refining agent and borax, weighing 0.1-0.2% of the refining agent and 0.3-0.9% of borax according to the mass percent of the aluminum alloy to be treated, respectively wrapping the refining agent and the borax by using aluminum foil paper, putting the aluminum foil paper into an oven, heating to 210-240 ℃, preserving heat for 4-5 hours, pressing the refining agent into the aluminum solution by using a bell jar, preserving heat for 6-12 minutes, removing slag, pressing the borax into the aluminum solution, and removing slag after the reaction is finished; keeping the temperature and standing for 40-80 min.
As a further scheme of the invention: the aluminum salt can be aluminum sulfate or aluminum chloride.
As a further scheme of the invention: in the preparation method of the aluminum melt, the inert gas is argon, and the flow rate of the inert gas is 16-24L/min.
As a further scheme of the invention: in the preparation method of the aluminum melt, the rotating speed of the stirrer during stirring is 410 +/-10 rpm.
As a further scheme of the invention: in the preparation method of the aluminum melt, the refining agent is calcium fluoride.
As a further scheme of the invention: the preferable mass percentage of the borax is 0.4-0.6%.
As a further scheme of the invention: the reaction temperature of the borax is 710-730 ℃ and the heat preservation time is 40-60 min.
As a further scheme of the invention: and (3) analyzing the chemical components of the sample by using an inductively coupled plasma atomic emission spectrometer.
Compared with the prior art, the invention has the beneficial effects that: a low-iron low-silicon aluminum liquid, a preparation method and application thereof have the advantages of convenient use, low cost, simple operation process, easy control, strong and rapid reaction in a regenerated aluminum melt, capture of iron element aggregation and precipitation in the melt, good iron and silicon removal effect and high efficiency.
Detailed Description
The low-iron low-silicon aluminum liquid and the preparation method and the application thereof have the advantages of convenient use, low cost, simple operation process, easy control, strong and rapid reaction in a regenerated aluminum melt, capture of iron element aggregation and precipitation in the melt, good iron removal effect and high efficiency.
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
1) Preparation of aluminum solution
A. Putting the aluminum material into a crucible for heating and melting, and heating to 720 ℃ to obtain a molten liquid;
B. adding a slag removing agent into the molten liquid and uniformly stirring;
C. removing scum;
d, continuously introducing inert gas into the melt while stirring the melt by using a stirrer, and adding a refining agent with the mass percent of 0.1% into the melt;
E. stopping stirring after the stirring time of the stirrer reaches a first preset time, and removing scum;
F. heating the molten liquid to 730 +/-10 ℃, and standing according to a second preset time to obtain the final molten aluminum;
2) preparation of Polynuclear polymeric hydroxyl groups
Dissolving aluminum salt in water, stirring to obtain solution, slowly adding sodium hydroxide solid particles until pH is adjusted to 4.5, standing for 4h, pouring out supernatant, drying the turbid solution in an oven for 9h, and grinding;
3) silicon removal of multi-core polymeric hydroxyl aluminum liquid
Pouring the clarified causticized section aluminum liquid into a beaker, heating to 92 ℃, then weighing polynuclear polymeric hydroxyl groups according to the mass-volume concentration of 2g/L of the polynuclear polymeric hydroxyl aluminum and the aluminum liquid, adding the polynuclear polymeric hydroxyl aluminum obtained by polynuclear polymeric hydroxyl groups into the aluminum solution, stirring for reaction for 4min, and filtering;
4) respectively grinding a refining agent and borax, weighing 0.1% of the refining agent and 0.3% of borax according to the mass percent of the aluminum alloy to be treated, respectively wrapping the refining agent and the borax by using aluminum foil paper, putting the aluminum foil paper into an oven, heating to 210 ℃, preserving heat for 4 hours, pressing the refining agent into an aluminum solution by using a bell jar, preserving heat for 6 minutes, removing slag, and pressing the borax into the aluminum solution until the reaction is completed, and removing slag; keeping the temperature and standing for 40 min; the iron removal rate is 4.51 percent and the silicon removal rate is 5.56 percent.
Example 2
1) Preparation of aluminum solution
A. Putting the aluminum material into a crucible for heating and melting, and heating to 725 ℃ to obtain a molten liquid;
B. adding a slag removing agent into the molten liquid and uniformly stirring;
C. removing scum;
d, continuously introducing inert gas into the melt while stirring the melt by using a stirrer, and adding a refining agent with the mass percent of 0.13% into the melt;
E. stopping stirring after the stirring time of the stirrer reaches a first preset time, and removing scum;
F. heating the molten liquid to 730 +/-10 ℃, and standing according to a second preset time to obtain the final molten aluminum;
2) preparation of Polynuclear polymeric hydroxyl groups
Dissolving aluminum salt in water, stirring to obtain a solution, slowly adding sodium hydroxide solid particles until the pH value is adjusted to 5, standing for 5h, pouring out supernatant, drying the turbid solution in an oven for 9h, and grinding;
3) silicon removal of multi-core polymeric hydroxyl aluminum liquid
Pouring the clarified causticized section aluminum liquid into a beaker, heating to 94 ℃, then weighing polynuclear polymeric hydroxyl groups according to the mass-volume concentration of 3g/L of the polynuclear polymeric hydroxyl aluminum and the aluminum liquid, adding the polynuclear polymeric hydroxyl aluminum obtained by polynuclear polymeric hydroxyl groups into the aluminum solution, stirring for reaction for 5min, and filtering;
4) respectively grinding a refining agent and borax, weighing 0.15% of the refining agent and 0.35% of borax according to the mass percent of the aluminum alloy to be treated, respectively wrapping the refining agent and the borax by using aluminum foil paper, putting the aluminum foil paper into an oven, heating to 215 ℃, preserving heat for 5 hours, pressing the refining agent into an aluminum solution by using a bell jar, preserving heat for 7 minutes, removing slag, and pressing the borax into the aluminum solution until the reaction is finished, and removing slag; keeping the temperature and standing for 42 min; the iron removal rate is 5.01 percent and the silicon removal rate is 6.31 percent.
Example 3
1) Preparation of aluminum solution
A. Putting the aluminum material into a crucible for heating and melting, and heating to 730 ℃ to obtain a molten liquid;
B. adding a slag removing agent into the molten liquid and uniformly stirring;
C. removing scum;
d, continuously introducing inert gas into the melt while stirring the melt by using a stirrer, and adding a refining agent with the mass percent of 0.15% into the melt;
E. stopping stirring after the stirring time of the stirrer reaches a first preset time, and removing scum;
F. heating the molten liquid to 730 +/-10 ℃, and standing according to a second preset time to obtain the final molten aluminum;
2) preparation of Polynuclear polymeric hydroxyl groups
Dissolving aluminum salt in water, stirring to obtain a solution, slowly adding sodium hydroxide solid particles until the pH value is adjusted to 6, standing for 56h, pouring out supernatant, putting the turbid solution into an oven for drying 910h, and grinding;
3) silicon removal of multi-core polymeric hydroxyl aluminum liquid
Pouring the clarified causticized section aluminum liquid into a beaker, heating to 96 ℃, then weighing polynuclear polymeric hydroxyl groups according to the mass-volume concentration of the polynuclear polymeric hydroxyl aluminum and the aluminum liquid of 5g/L, adding the polynuclear polymeric hydroxyl aluminum obtained by polynuclear polymeric hydroxyl groups into the aluminum solution, stirring for reaction for 7min, and filtering;
4) respectively grinding a refining agent and borax, weighing 0.18 percent of the refining agent and 0.4 percent of borax according to the mass percent of the aluminum alloy to be treated, respectively wrapping the refining agent and the borax by using aluminum foil paper, putting the aluminum foil paper into an oven, heating to 220 ℃, keeping the temperature for 7 hours, pressing the refining agent into an aluminum solution by using a bell jar, keeping the temperature for 8 minutes, removing slag, and pressing the borax into the aluminum solution until the reaction is finished, and removing slag; keeping the temperature and standing for 43 min; the iron removal rate is 5.52 percent and the silicon removal rate is 6.64 percent.
Example 4
1) Preparation of aluminum solution
A. Putting the aluminum material into a crucible for heating and melting, and heating to 740 ℃ to obtain a molten liquid;
B. adding a slag removing agent into the molten liquid and uniformly stirring;
C. removing scum;
d, continuously introducing inert gas into the melt while stirring the melt by using a stirrer, and adding a refining agent with the mass percent of 0.2% into the melt;
E. stopping stirring after the stirring time of the stirrer reaches a first preset time, and removing scum;
F. heating the molten liquid to 730 +/-10 ℃, and standing according to a second preset time to obtain the final molten aluminum;
2) preparation of Polynuclear polymeric hydroxyl groups
Dissolving aluminum salt in water, stirring to obtain solution, slowly adding sodium hydroxide solid particles until pH is adjusted to 7.5, standing for 8h, pouring out supernatant, drying the turbid solution in an oven for 9h, and grinding;
3) silicon removal of multi-core polymeric hydroxyl aluminum liquid
Pouring the clarified causticized section aluminum liquid into a beaker, heating to 100 ℃, then weighing polynuclear polymeric hydroxyl groups according to the mass-volume concentration of the polynuclear polymeric hydroxyl aluminum and the aluminum liquid of 13g/L, adding the polynuclear polymeric hydroxyl aluminum obtained by polynuclear polymeric hydroxyl groups into the aluminum solution, stirring for reaction for 9min, and filtering;
4) respectively grinding a refining agent and borax, weighing 0.2% of the refining agent and 00.9% of borax according to the mass percent of the aluminum alloy to be treated, respectively wrapping the refining agent and the borax by using aluminum foil paper, putting the aluminum foil paper into an oven, heating to 240 ℃, preserving heat for 5 hours, pressing the refining agent into an aluminum solution by using a bell jar, preserving heat for 12 minutes, removing slag, and pressing the borax into the aluminum solution until the reaction is completed, and removing slag; keeping the temperature and standing for 80 min; the iron removal rate is 6.85 percent and the silicon removal rate is 7.53 percent.
Compared with data, the low-iron low-silicon aluminum liquid, and the preparation method and application thereof have the advantages of convenient use, low cost, simple operation process, easy control, strong and rapid reaction in the regenerated aluminum melt, capture of aggregation and precipitation of iron elements in the melt, good iron removal effect and high efficiency.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (8)
1. A preparation method of low-iron and low-silicon aluminum liquid is characterized by comprising the following steps:
1) preparation of aluminum solution
A. Putting the aluminum material into a crucible for heating and melting, and heating to 720-740 ℃ to obtain a melt;
B. adding a slag removing agent into the molten liquid and uniformly stirring;
C. removing scum;
d, continuously introducing inert gas into the melt while stirring the melt by using a stirrer, and adding a refining agent with the mass percent of 0.1-0.2% into the melt;
E. stopping stirring after the stirring time of the stirrer reaches a first preset time, and removing scum;
F. heating the molten liquid to 730 +/-10 ℃, and standing according to a second preset time to obtain the final molten aluminum;
2) preparation of Polynuclear polymeric hydroxyl groups
Dissolving aluminum salt in water, stirring to obtain solution, slowly adding sodium hydroxide solid particles until pH is adjusted to 4.5-7.5, standing for 4-8h, pouring out supernatant, drying the turbid solution in an oven for 9h, and grinding;
3) silicon removal of multi-core polymeric hydroxyl aluminum liquid
Pouring the clarified causticized section aluminum liquid into a beaker, heating to 92-100 ℃, then weighing polynuclear polymeric hydroxyl aluminum obtained by polynuclear polymeric hydroxyl according to the mass-volume concentration of 2-13g/L of the polynuclear polymeric hydroxyl aluminum and the aluminum liquid, adding the polynuclear polymeric hydroxyl aluminum into an aluminum solution, stirring for reaction for 4-9min, and filtering;
4) respectively grinding a refining agent and borax, weighing 0.1-0.2% of the refining agent and 0.3-0.9% of borax according to the mass percent of the aluminum alloy to be treated, respectively wrapping the refining agent and the borax by using aluminum foil paper, putting the aluminum foil paper into an oven, heating to 210-240 ℃, preserving heat for 4-5 hours, pressing the refining agent into the aluminum solution by using a bell jar, preserving heat for 6-12 minutes, removing slag, pressing the borax into the aluminum solution, and removing slag after the reaction is finished; keeping the temperature and standing for 40-80 min.
2. The method for preparing a low-iron and low-silicon aluminum liquid as claimed in claim 1, wherein the aluminum salt is aluminum sulfate or aluminum chloride.
3. The method as claimed in claim 1 or 2, wherein the inert gas is argon at a flow rate of 16-24L/min.
4. The method for preparing a low-iron and low-silicon aluminum liquid as claimed in claim 3, wherein in the method for preparing an aluminum melt, the stirring speed of the stirrer is 410 +/-10 rpm.
5. The method for preparing a low-iron and low-silicon aluminum liquid as claimed in claim 4, wherein in the method for preparing an aluminum melt, the refining agent is calcium fluoride.
6. The method for preparing low-iron and low-silicon aluminum liquid as claimed in claim 5, wherein the preferable mass percentage of borax is 0.4% -0.6%.
7. The method for preparing low-iron and low-silicon aluminum liquid as claimed in claim 6, wherein the reaction temperature during borax addition is 710-730 ℃, and the heat preservation time is 40-60 min.
8. The method for preparing a low-iron and low-silicon aluminum liquid as claimed in claim 1, wherein an inductively coupled plasma atomic emission spectrometer is used to analyze chemical components of the sample.
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| CN111074079A (en) * | 2020-02-26 | 2020-04-28 | 佛山市和阳精密金属制品有限公司 | Preparation method of aluminum melt |
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| CN103521170A (en) * | 2013-09-29 | 2014-01-22 | 陕西科技大学 | Preparation method and application of polyaluminum sulfate modified bentonite |
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Application publication date: 20210713 |