CN107937726A - Extracting Scandium from Red Mud and the method and system for preparing iron oxide red - Google Patents
Extracting Scandium from Red Mud and the method and system for preparing iron oxide red Download PDFInfo
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- CN107937726A CN107937726A CN201711342553.5A CN201711342553A CN107937726A CN 107937726 A CN107937726 A CN 107937726A CN 201711342553 A CN201711342553 A CN 201711342553A CN 107937726 A CN107937726 A CN 107937726A
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- scandium
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- acidleach
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide [Fe2O3]
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
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- Y02P10/20—Recycling
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Abstract
The invention discloses Extracting Scandium from Red Mud and the method and system for preparing iron oxide red, wherein, method includes：(1) red mud is subjected to acidleach processing and filtered, to remove gangue phase, obtain the acidleach filtrate containing iron and scandium；(2) sodium hydroxide is added into acidleach filtrate and water adjusts pH value, and heats and carries out heavy iron reaction, to form NaFe3(SO4)2(OH)6Iron polymeric form precipitation, be obtained by filtration filtrate containing scandium and iron content precipitation；(3) scandium filtrate will be contained to carry out proposing scandium processing, to obtain scandium oxide；And iron content is precipitated and carries out the first calcination process by (4), to decompose water outlet and sulfur dioxide, and obtains iron oxide red.High-grade scandium oxide not only can effectively be prepared using this method and recycle the iron in red mud, moreover it is possible to reduce production cost.
Description
Technical field
The invention belongs to field of metallurgy, and specifically, the present invention relates to Extracting Scandium from Red Mud and the method and system for preparing iron oxide red.
Background technology
Red mud is the solid residue after bauxite into alumina, often produce one ton of aluminium oxide can produce 0.8-1.5 tons it is red
Mud, produces 60,000,000 tons of red mud every year in the world at present, and only China just produces 30,000,000 tons every year, in the process of production aluminium oxide
More than 98% scandium can be retained in red mud in middle bauxite, and scandium content is in 60-120g/t in red mud, and is generally acknowledged that in the world
Scandium content is that the mineral of 20-50g/t just have utility value, so red mud is considered as the most important raw material sources of scandium.Scandium is
One kind of rare earth element, is widely used in the fields such as metallurgy, chemical industry, space flight, electric light source.Scandium oxide is mainly used in efficient more work(
Can laser, solid electrolyte, special cermacis etc., various the intermediate alloys such as aluminium, Mg-based master alloy of scandium be production guided missile and
The special alloy of various spacecrafts, automobile, ship etc., and metal scandium is mainly used in optical engineering, such as produces large-scale halogen lamp
And solar storage battery etc..
It is mainly by the method for sour leaching-extraction that scandium is extracted from red mud, and the leaching agent taken is generally hydrochloric acid and nitric acid,
Extraction process is mainly using neutral phosphine extractant TBP, P204 or P507 etc..However, a large amount of existing iron aluminium silicon etc. in red mud
Element can be also dissolved during acidleach, not only consume a large amount of leaching agents, and also follow-up extraction process can be caused extremely not
Sharp influence, extracts as in extraction with scandium competition can occur for iron, influences the extraction yield of scandium, the presence of sial can produce extraction
Extremely serious emulsion, is difficult to extraction process.Therefore, the method for Extracting Scandium from Red Mud is further improved.
The content of the invention
It is contemplated that solve at least some of the technical problems in related technologies.For this reason, the present invention
One purpose is to propose Extracting Scandium from Red Mud and prepares the method and system of iron oxide red.Using Extracting Scandium from Red Mud proposed by the present invention and preparation
The method of iron oxide red, not only can effectively be prepared high-grade scandium oxide and recycle the iron in red mud, moreover it is possible to reduce life
Produce cost.
According to an aspect of the present invention, the present invention proposes a kind of Extracting Scandium from Red Mud and the method for preparing iron oxide red, including：
(1) red mud is subjected to acidleach processing and filtered, to remove gangue phase, obtain the acidleach filtrate containing iron and scandium；
(2) sodium hydroxide is added into the acidleach filtrate and water adjusts pH value, and heats and carries out heavy iron reaction, so as to shape
Into NaFe3(SO4)2(OH)6Iron polymeric form precipitation, be obtained by filtration filtrate containing scandium and iron content precipitation；
(3) filtrate containing scandium is carried out proposing scandium processing, to obtain scandium oxide；And
(4) iron content is precipitated and carries out the first calcination process, to decompose water outlet and sulfur dioxide, and obtain iron oxide red.
Extracting Scandium from Red Mud according to the above embodiment of the present invention and the method for preparing iron oxide red, by carrying out acidleach to red mud first
Gangue phase is removed, heavy iron reaction is then carried out to the acidleach filtrate containing iron and scandium, can effectively realize the separation of iron and scandium, most
Afterwards by carrying out putting forward scandium processing and the first calcination process to filtrate containing scandium and iron content precipitation respectively, Gao Pin can effectively be prepared
The scandium oxide and iron oxide red of position.Thus, the Extracting Scandium from Red Mud by using the above embodiment of the present invention and the method for preparing iron oxide red,
High-grade scandium oxide not only can effectively be prepared, and recycle the iron in red mud, while reduce production cost, moreover it is possible to
Effectively solve the problems, such as that the impurity such as the iron sial during Extracting Scandium from Red Mud seriously affect the efficiency of Extracting Scandium from Red Mud and the rate of recovery of scandium.
In addition, Extracting Scandium from Red Mud according to the above embodiment of the present invention and the method for preparing iron oxide red can also have following add
Technical characteristic：
In some embodiments of the invention, Extracting Scandium from Red Mud and the method for preparing iron oxide red further comprise：In advance by red mud
It is finely ground to below 0.0325mm.Thus, it is possible to further improve the efficiency and effect that acidleach processing is carried out to red mud, gangue is realized
Xiang Yutie and scandium efficiently separate.
In some embodiments of the invention, in step (1), using concentration be 45-55% sulfuric acid to the red mud into
Row acidleach is handled.Thus, it is possible to make iron in red mud and scandium be substantially soluble in sulfuric acid, and then significantly improve iron and scandium in red mud
The rate of recovery.
In some embodiments of the invention, the temperature of the acidleach processing is 70-90 degrees Celsius, and preferably 75-85 is Celsius
Degree, time are 50-75 minutes, preferably 55-70 minutes.Thus, it is possible to iron in red mud and scandium is substantially soluble in sulfuric acid, and then
Further improve the rate of recovery of iron and scandium in red mud.
In some embodiments of the invention, in step (2), the sodium hydroxide and water are added into the acidleach filtrate
It is 1.3-1.6 to pH value is adjusted, and controls Fe3+With Na+Concentration ratio be 1:(0.3-0.6).Thus, can not only make containing iron
It can fully be precipitated with the iron in the acidleach filtrate of scandium, realize efficiently separating for iron and scandium, moreover it is possible to effectively avoid introducing excessive
Foreign ion causes to propose the increase of scandium intractability.
In some embodiments of the invention, the temperature of the heavy iron reaction is 90-110 degrees Celsius, and preferably 95-105 takes the photograph
Family name's degree, the time of the heavy iron reaction is 55-95 minutes, preferably 60-90 minutes.Thus, it is possible to make the acidleach containing iron and scandium
Iron in filtrate can be precipitated fully, and then realize efficiently separating for iron and scandium, and further improve the rate of recovery of iron in red mud.
In some embodiments of the invention, in step (4), the temperature of first calcination process is Celsius for 850-1050
Degree, preferably 900-1000 degrees Celsius.Thus, it is possible to iron content precipitation is set fully to decompose and then obtain high-grade iron oxide red.
In some embodiments of the invention, it is described carry scandium processing include：Concentration is evaporated to the filtrate containing scandium, with
Just concentrate containing scandium is obtained；Sodium carbonate is added into the concentrate containing scandium and is heated to seething with excitement, to make scandium ion and carbonic acid
Radical ion forms carbonate deposition, is obtained by filtration and is precipitated containing scandium；The precipitation containing scandium is subjected to the second calcination process, to obtain
The scandium oxide.Thus, it is possible to the grade for the scandium oxide being effectively prepared.
In some embodiments of the invention, the concentration of scandium ion is 8-10g/L in the concentrate containing scandium, the carbonic acid
The concentration of sodium is 12-18g/L, and the temperature of second calcination process is 580-750 degrees Celsius, preferably 600-700 degrees Celsius.By
This, can further improve the efficiency for proposing scandium processing and the rate of recovery of scandium.
According to the second aspect of the invention, the invention also provides a kind of red mud for implementing the above embodiment of the present invention carries
Scandium and prepare iron oxide red method system, including：
Pickling tank, the pickling tank have red mud entrance, sulfuric acid entrance and acidleach serum outlet,
First filter, the filter has acidleach injection point, gangue mutually exports and acidleach filtrate (liquid, the acid
Leaching injection point is connected with the acidleach serum outlet；
Heavy alum groove, the heavy alum groove have acidleach filtrate inlet, sodium hydroxide entrance, water inlet and heavy iron serum outlet,
The acidleach filtrate inlet is connected with the acidleach filtrate (liquid；
Second filter, second filter have heavy iron injection point, filtrate (liquid containing scandium and the outlet of iron content precipitation,
The heavy iron injection point is connected with the heavy iron serum outlet；
First roaster, first roaster have iron content precipitation entrance, gas vent and iron oxide red outlet, the iron content
Precipitation entrance is connected with the outlet of iron content precipitation；
Concentration and settlement groove, the concentration and settlement groove have filtrate inlet containing scandium, sodium carbonate entrance and heavy scandium serum outlet, institute
Filtrate inlet containing scandium is stated with the filtrate (liquid containing scandium to be connected；
3rd filter, the 3rd filter has heavy scandium injection point, precipitates outlet and filtrate (liquid containing scandium, described
Heavy scandium injection point is connected with the heavy scandium serum outlet；
Second roaster, second roaster has containing scandium precipitation entrance and scandium oxide outlet, described to sink containing scandium
Shallow lake entrance is connected with the outlet containing scandium precipitation.
Extracting Scandium from Red Mud according to the above embodiment of the present invention and the system for preparing iron oxide red, can in pickling tank to red mud into
Row acidleach handles and utilizes the first filter to remove gangue phase, then by the obtained acidleach filtrate containing iron and scandium in precipitation groove
In carry out heavy iron and react and filtered in the second filter, realize efficiently separating for iron and scandium, the iron content that will finally obtain respectively
It is deposited in the first roaster and carries out the first calcination process and obtain high-grade iron oxide red；By obtained filtrate containing scandium in concentration and settlement
React in groove and filtered through the 3rd filter, resupply to the second roaster and carry out the second calcination process, obtain high-grade three
Aoxidize two scandiums.Thus, the Extracting Scandium from Red Mud by using the above embodiment of the present invention and the system for preparing iron oxide red, not only can be effective
High-grade scandium oxide is prepared, and recycles the iron in red mud, while reduces production cost, moreover it is possible to effectively solves red mud
Carry the impurity such as the iron sial during scandium seriously affect Extracting Scandium from Red Mud efficiency and scandium the rate of recovery the problem of.
In some embodiments of the invention, Extracting Scandium from Red Mud and the system for preparing iron oxide red further comprise：Ore grinding device, institute
Ore grinding device is stated with the red mud entrance of the pickling tank to be connected, and suitable for carrying out fine grinding to red mud.Thus, it is possible to further improve
The efficiency and effect of acidleach processing are carried out to red mud, realizes efficiently separating for gangue phase and iron and scandium.
Brief description of the drawings
Fig. 1 is Extracting Scandium from Red Mud according to an embodiment of the invention and prepares the flow chart of the method for iron oxide red.
Fig. 2 be according to the present invention the Extracting Scandium from Red Mud of another embodiment and prepare iron oxide red method flow chart.
Fig. 3 be according to the present invention the Extracting Scandium from Red Mud of further embodiment and prepare iron oxide red method flow chart.
Fig. 4 is Extracting Scandium from Red Mud according to an embodiment of the invention and prepares the structure diagram of the system of iron oxide red.
Fig. 5 be according to the present invention the Extracting Scandium from Red Mud of another embodiment and prepare iron oxide red system structure diagram.
Embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
According to an aspect of the present invention, the present invention proposes a kind of Extracting Scandium from Red Mud and the method for preparing iron oxide red, including：
(1) red mud is subjected to acidleach processing and filtered, to remove gangue phase, obtain the acidleach filtrate containing iron and scandium；
(2) sodium hydroxide is added into acidleach filtrate and water adjusts pH value, and heats and carries out heavy iron reaction, to form NaFe3(SO4)2
(OH)6Iron polymeric form precipitation, be obtained by filtration filtrate containing scandium and iron content precipitation；(3) scandium filtrate will be contained to carry out proposing scandium processing, so as to
Obtain scandium oxide；And iron content is precipitated and carries out the first calcination process by (4), to decompose water outlet and sulfur dioxide, and obtain
To iron oxide red.
Extracting Scandium from Red Mud according to the above embodiment of the present invention and the method for preparing iron oxide red, by carrying out acidleach to red mud first
Gangue phase is removed, heavy iron reaction is then carried out to the acidleach filtrate containing iron and scandium, can effectively realize the separation of iron and scandium, most
Afterwards by carrying out putting forward scandium processing and the first calcination process to filtrate containing scandium and iron content precipitation respectively, Gao Pin can effectively be prepared
The scandium oxide and iron oxide red of position.Thus, the Extracting Scandium from Red Mud by using the above embodiment of the present invention and the method for preparing iron oxide red,
High-grade scandium oxide not only can effectively be prepared, and recycle the iron in red mud, while reduce production cost, moreover it is possible to
Effectively solve the problems, such as that the impurity such as the iron sial during Extracting Scandium from Red Mud seriously affect the efficiency of Extracting Scandium from Red Mud and the rate of recovery of scandium.
Retouched in detail with the method for preparing iron oxide red below with reference to the Extracting Scandium from Red Mud of Fig. 1-3 pairs of the above embodiment of the present invention
State.
S100：Red mud is subjected to acidleach processing and is filtered, to remove gangue phase, obtains the acidleach filtrate containing iron and scandium
According to an embodiment of the invention, red mud is subjected to acidleach processing and filtered, to remove gangue phase, obtained containing iron
With the acidleach filtrate of scandium.Calcium, magnesium, silicon in red mud, the gangue of aluminium composition are mutually insoluble in acid, by the way that red mud is carried out in the present invention
Acidleach is handled and filtered, and can effectively remove the impurity such as sial in gangue, and then avoid the impurity effect Extracting Scandium from Red Mud such as sial
Efficiency and effect.
According to a particular embodiment of the invention, the content of TFe can be 26-33% in red mud, and the content of scandium can be 80-
130g/t.By using the red mud of above-mentioned composition it is raw material in the present invention, Extracting Scandium from Red Mud can be further improved and prepare iron oxide red
Efficiency and red mud in the rate of recovery of scandium and iron.
According to a particular embodiment of the invention, Extracting Scandium from Red Mud and the method for preparing iron oxide red may further include：In advance will
Red mud is finely ground to below 0.0325mm.Inventor has found that iron is mainly with Fe in red mud2O3Form exist, scandium is with the shape of oxide
Formula exists, and carries out acidleach processing again by the way that red mud is finely ground to below 0.0325mm in the present invention, can further improve to red
Mud carries out the efficiency and the leaching rate of scandium and iron of acidleach processing.Thus, red mud is finely ground to below 0.0325mm and carries out acidleach
Handle and filter, can effectively remove gangue phase and obtain the more pure acidleach filtrate containing iron and scandium.
According to a particular embodiment of the invention, acidleach can be carried out to red mud for the sulfuric acid of 45-55% using concentration
Processing.Inventor has found, the concentration of sulfuric acid is too low to seriously affect the efficiency that acidleach processing is carried out to red mud and scandium and iron
Leaching rate, and it is difficult to further improve leaching efficiency and leaching rate to scandium in red mud and iron that sulfuric acid concentration is excessive, this hair
Acidleach processing is carried out to red mud by using the sulfuric acid that concentration is 45-55% in bright, can significantly improve and acidleach is carried out to red mud
The efficiency and scandium of processing and the leaching rate of iron, make the leaching rate of iron reach 88-92%, and the leaching rate of scandium reaches 92-95%, this
When, iron and scandium exist in the form of positive trivalent in the acidleach filtrate containing iron and scandium.
According to a particular embodiment of the invention, it can be stirred continuously in acidleach processing procedure, while constantly be filled to acidleach
Put middle supplement sulfuric acid, it is ensured that sulfuric acid concentration is in the range of 45-55%.Red mud is carried out at acidleach thus, it is possible to further improve
The efficiency and scandium of reason and the leaching rate of iron.
According to a particular embodiment of the invention, the temperature of acidleach processing can be 70-90 degrees Celsius, and the time can be 50-
75 minutes.By using above-mentioned acidleach treatment conditions in the present invention, the iron in red mud and scandium can be made fully to leach, and then significantly
Improve the rate of recovery of iron and scandium in red mud.
According to a particular embodiment of the invention, the temperature of the acidleach processing can be preferably 75-85 degrees Celsius, and the time can
To be preferably 55-70 minutes.By selecting above-mentioned acidleach treatment conditions in the present invention, the effect of acidleach processing can be further improved
Fruit, and then further improve the rate of recovery of iron and scandium in red mud.
S200：Sodium hydroxide is added into acidleach filtrate and water adjusts pH value, and heats and carries out heavy iron reaction, to be formed
Iron polymeric form precipitates, and filtrate containing scandium and iron content precipitation is obtained by filtration
According to an embodiment of the invention, in the present invention pH value is adjusted by adding sodium hydroxide and water into acidleach filtrate simultaneously
Heated, the ferric ion in acidleach filtrate and sulfate ion can be made to react with sodium hydroxide, water and generate NaFe3
(SO4)2(OH)6The separation of iron and scandium can be achieved in precipitation, further filtering.
According to a particular embodiment of the invention, sodium hydroxide and water can be added into acidleach filtrate to pH value is adjusted is
1.3-1.6, and control Fe3+With Na+Molar ratio be 1:(0.3-0.6).Inventor has found, if adding acid after sodium hydroxide and water
The pH value of lixivium is less than 1.3, can seriously affect the speed of heavy iron, and the pH value for adding acidleach filtrate after sodium hydroxide and water is big
In 1.6, then Na ion concentration can be reduced, a part of iron does not settle, and cannot get pure solution containing scandium.And into acidleach filtrate
After adding sodium hydroxide, if Fe3+With Na+Molar ratio be less than 1:When (0.3-0.6), iron reaction of sinking is in rational pH value and Fe
Carried out in ion and Na ions molar ratio range, Fe ions and Na ion ratios are too big, and iron cannot precipitate completely, and ratio is too
Small, Na ion concentrations are too high, influence sinking speed.If Fe3+With Na+Concentration ratio be more than 1:When 0.3, iron in acidleach filtrate from
Son cannot be precipitated fully, not only influence the rate of recovery of iron, also be unfavorable for realizing efficiently separating for iron and scandium.Pass through in the present invention
It is 1.3-1.6 to control and add the pH value of acidleach filtrate after sodium hydroxide and water, and controls Fe3+With Na+Concentration ratio be 1:(0.3-
0.6), it can be not only NaFe3(SO4)2(OH)6Suitable acid condition is improved, enables the iron ion in acidleach filtrate abundant
Precipitation, moreover it is possible to make the iron polymeric form that reaction generates be deposited in stable under acidic conditions presence, avoid iron polymeric form precipitation from occurring
Decompose and influence the separation of iron and scandium.Thus, efficiently separating for iron and scandium can be not only realized, moreover it is possible to further improve in red mud
The rate of recovery of iron.
According to a particular embodiment of the invention, the temperature of the heavy iron reaction can be 90-110 degrees Celsius, and the time can be with
For 55-95 minutes.Thus, it is possible to enable the iron ion in acidleach filtrate fully to precipitate, and then realize effective point of iron and scandium
From.
According to a particular embodiment of the invention, the temperature of the heavy iron reaction can preferably 95-105 degrees Celsius, and the time can
With 60-90 minutes preferred.Thus, it is possible to further improve the separating effect of iron and scandium, and then returning for iron can be further improved
Yield and the follow-up efficiency for proposing scandium processing.
According to a particular embodiment of the invention, the iron content being obtained by filtration can be precipitated and is washed, so as to except attachment removal
Free sodium ion in iron content precipitation.
S300：Scandium filtrate will be contained to carry out proposing scandium processing, to obtain scandium oxide
According to an embodiment of the invention, scandium filtrate will be contained to carry out proposing scandium processing, to obtain scandium oxide.Thus, may be used
Effectively to recycle the scandium in red mud.
According to a particular embodiment of the invention, with reference to figure 3, proposing scandium processing can include：Filtrate containing scandium is evaporated dense
Contracting, to obtain concentrate containing scandium；Sodium carbonate is added into concentrate containing scandium and is heated to seething with excitement, to make scandium ion and carbonic acid
Radical ion forms carbonate deposition, is obtained by filtration and is precipitated containing scandium；Scandium precipitation will be contained and carry out the second calcination process, to obtain three oxygen
Change two scandiums.Scandium processing is proposed by using above-mentioned in the present invention, can not only significantly improve the efficiency for proposing scandium processing, can also be into one
Step improves the rate of recovery of scandium and the grade of scandium oxide, and the grade for the scandium oxide for making to be prepared is not less than 98%.
According to a particular embodiment of the invention, the concentration that scandium ion after concentrating is evaporated to filtrate containing scandium can be 8-
10g/L.Thus, it is possible to further improve the efficiency for proposing scandium processing and the rate of recovery of scandium.Scandium ion concentration is too low, increases scandium solution
Amount, while scandium ion concentration is too low, is unfavorable for trapping of the carbonate to scandium ion, scandium ion concentration is too high, can cause carbonate
Solubility declines, the same collecting rate for influencing scandium.
According to a particular embodiment of the invention, the concentration of the sodium carbonate added into concentrate containing scandium can be 12-18g/
L.Thus, it is possible to further improve the efficiency of scandium ion and carbanion formation carbonate deposition.Inventor's discovery, sodium carbonate
Additive amount can be determined according to the concentration of scandium ion in solution, when concentration of sodium carbonate is too low, the collecting rate of scandium can be caused too
Low, carbonate concentration is excessive, can largely influence the pH of solution, can equally be adversely affected to the sealed Belt of scandium.And then
The concentration of the sodium carbonate added into concentrate containing scandium can be that 12-18g/L is optimal, can further improve scandium ion and carbon
Acid ion forms the efficiency of carbonate deposition.
According to a particular embodiment of the invention, it can will contain after scandium precipitation is washed and dried and carry out again at the second roasting
Reason.Thus, it is possible to further improve the grade for the scandium oxide being prepared.
According to a particular embodiment of the invention, the temperature of the second calcination process can be 580-750 degrees Celsius, thus, can
High-grade scandium oxide is effectively prepared.
According to a particular embodiment of the invention, the temperature of the second calcination process can be preferably 600-700 degrees Celsius.By
This, not only can effectively be prepared high-grade scandium oxide, moreover it is possible to further improve the efficiency for preparing scandium oxide.
S400：Iron content is precipitated and carries out the first calcination process, to decompose water outlet and sulfur dioxide, and obtains iron oxide red
According to an embodiment of the invention, the first calcination process is carried out by being precipitated to iron content, carbon containing precipitation NaFe can be made3
(SO4)2(OH)6Decompose, and generate water, sulfur dioxide and Fe2O3, water and sulfur dioxide are volatized into flue, finally obtain Fe2O3
Grade is more than 99% iron oxide red product.
According to a particular embodiment of the invention, the temperature of the first calcination process can be 850-1050 degrees Celsius.The present invention
In by using above-mentioned roasting condition, iron content precipitation can be made fully to decompose and then obtain high-grade iron oxide red.
According to a particular embodiment of the invention, the temperature of the first calcination process can be preferably 900-1000 degrees Celsius.By
This, can not only make iron content precipitation fully to decompose and then obtain high-grade iron oxide red, moreover it is possible to further improve the first roasting
The efficiency of processing.
According to the second aspect of the invention, the invention also provides a kind of red mud for implementing the above embodiment of the present invention carries
Scandium and prepare iron oxide red method system, with reference to figure 4, including：Pickling tank 100, the first filter 200, heavy alum groove 300, second
Filter 400, the first roaster 500, concentration and settlement groove 600, the 3rd filter 700 and the second roaster 800.
Extracting Scandium from Red Mud according to the above embodiment of the present invention and the system for preparing iron oxide red, can be in pickling tank 100 to red
Mud carries out acidleach processing and removes gangue phase, the acidleach filtrate containing iron and scandium that then will be obtained using the first filter 200
Heavy iron is carried out in precipitation groove 300 to react and filter in the second filter 400, is realized efficiently separating for iron and scandium, is finally divided
Obtained iron content is not deposited in and carries out the first calcination process in the first roaster 500 and obtains high-grade iron oxide red；By what is obtained
Filtrate containing scandium is reacted in concentration and settlement groove 600 and is filtered through the 3rd filter 700, resupplies to the second roaster 800 and carries out
Second calcination process, obtains high-grade scandium oxide.Thus, by using the above embodiment of the present invention Extracting Scandium from Red Mud and
The system for preparing iron oxide red, not only can effectively be prepared high-grade scandium oxide, and recycle the iron in red mud, drop at the same time
Low production cost, moreover it is possible to which the impurity such as iron sial effectively during solution Extracting Scandium from Red Mud seriously affects the efficiency and scandium of Extracting Scandium from Red Mud
The rate of recovery the problem of.
Retouched in detail with the system for preparing iron oxide red below with reference to the Extracting Scandium from Red Mud of Fig. 4-5 pairs of the above embodiment of the present invention
State.
Pickling tank 100
According to an embodiment of the invention, pickling tank 100 has red mud entrance 110, sulfuric acid entrance 120 and acidleach serum outlet
130, and suitable for carrying out acidleach processing to red mud.
According to an embodiment of the invention, the gangue of the calcium in red mud, magnesium, silicon, aluminium composition leads to mutually insoluble in acid in of the invention
Cross and red mud is subjected to acidleach processing in pickling tank 100, and by subsequent filter, it is miscellaneous can effectively to remove sial in gangue etc.
Matter, and then avoid the efficiency and effect of the impurity effect Extracting Scandium from Red Mud such as sial.
According to a particular embodiment of the invention, the content of TFe can be 26-33% in red mud, and the content of scandium can be 80-
130g/t.By using the red mud of above-mentioned composition it is raw material in the present invention, Extracting Scandium from Red Mud can be further improved and prepare iron oxide red
Efficiency and red mud in the rate of recovery of scandium and iron.
According to a particular embodiment of the invention, acidleach can be carried out to red mud for the sulfuric acid of 45-55% using concentration
Processing.Inventor has found, the concentration of sulfuric acid is too low to seriously affect the efficiency that acidleach processing is carried out to red mud and scandium and iron
Leaching rate, and it is difficult to further improve leaching efficiency and leaching rate to scandium in red mud and iron that sulfuric acid concentration is excessive, this hair
Acidleach processing is carried out to red mud by using the sulfuric acid that concentration is 45-55% in bright, can significantly improve and acidleach is carried out to red mud
The efficiency and scandium of processing and the leaching rate of iron, make the leaching rate of iron reach 88-92%, and the leaching rate of scandium reaches 92-95%, this
When, iron and scandium exist in the form of positive trivalent in the acidleach filtrate containing iron and scandium.
According to a particular embodiment of the invention, it can be stirred continuously in acidleach processing procedure, while constantly be filled to acidleach
Put middle supplement sulfuric acid, it is ensured that sulfuric acid concentration is in the range of 45-55%.Red mud is carried out at acidleach thus, it is possible to further improve
The efficiency and scandium of reason and the leaching rate of iron.
According to a particular embodiment of the invention, the temperature of acidleach processing can be 70-90 degrees Celsius, and the time can be 50-
75 minutes.By using above-mentioned acidleach treatment conditions in the present invention, the iron in red mud and scandium can be made fully to leach, and then significantly
Improve the rate of recovery of iron and scandium in red mud.
According to a particular embodiment of the invention, the temperature of the acidleach processing can be preferably 75-85 degrees Celsius, and the time can
To be preferably 55-70 minutes.By selecting above-mentioned acidleach treatment conditions in the present invention, the effect of acidleach processing can be further improved
Fruit, and then further improve the rate of recovery of iron and scandium in red mud.If acidleach temperature is too high, serious damage can be formed to leaching equipment
Evil, temperature is too low, then leaching rate reduces.
According to a particular embodiment of the invention, can further be wrapped with the system for preparing iron oxide red with reference to figure 5, Extracting Scandium from Red Mud
Include：Ore grinding device 900, ore grinding device 900 are connected with the red mud entrance 110 of pickling tank 100, and suitable for carrying out fine grinding to red mud.
Inventor has found that iron is mainly with Fe in red mud2O3Form exist, scandium exists in the form of the oxide, by will be red in the present invention
Acidleach processing is carried out after mud fine grinding again, the leaching of the efficiency that acidleach processing is carried out to red mud and scandium and iron can be significantly improved
Rate.
According to a particular embodiment of the invention, red mud can be finely ground to below 0.0325mm in advance.Thus, it is possible into one
Step improves the efficiency and the leaching rate of scandium and iron that acidleach processing is carried out to red mud, and then can effectively remove gangue phase and obtain
The more pure acidleach filtrate containing iron and scandium.
First filter 200
According to an embodiment of the invention, there is the first filter 200 acidleach injection point 210, gangue mutually to export 220 and acid
Lixivium outlet 230, acidleach injection point 210 is connected with acidleach serum outlet 130, and is starched suitable for the acidleach after handling acidleach
Liquid is filtered, and to remove gangue phase, obtains the acidleach filtrate containing iron and scandium.
Heavy alum groove 300
According to an embodiment of the invention, there is the alum groove 300 that sinks acidleach filtrate inlet 310, sodium hydroxide entrance 320, water to enter
Mouth 330 and heavy iron serum outlet 340, acidleach filtrate inlet 310 are connected with acidleach filtrate (liquid 230, and are suitable for acidleach filtrate
Middle addition sodium hydroxide and water are heated and carry out heavy iron reaction to adjusting pH value, to form NaFe3(SO4)2(OH)6Iron gather
Close state precipitation.
According to an embodiment of the invention, in the present invention pH value is adjusted by adding sodium hydroxide and water into acidleach filtrate simultaneously
Heated, the ferric ion in acidleach filtrate and sulfate ion can be made to react with sodium hydroxide, water and generate NaFe3
(SO4)2(OH)6Precipitation, and then by further filtering the separation of i.e. achievable iron and scandium.
According to a particular embodiment of the invention, sodium hydroxide and water can be added into acidleach filtrate to pH value is adjusted is
1.3-1.6, and control Fe3+With Na+Molar ratio be 1:(0.3-0.6).Inventor has found, if adding acid after sodium hydroxide and water
The pH value of lixivium is less than 1.3, can seriously affect the speed of heavy iron, and the pH value for adding acidleach filtrate after sodium hydroxide and water is big
In 1.6, then Na ion concentration can be reduced, a part of iron does not settle, and cannot get pure solution containing scandium.And into acidleach filtrate
After adding sodium hydroxide, if Fe3+With Na+Molar ratio be less than 1:When (0.3-0.6), iron reaction of sinking is in rational pH value and Fe
Carried out in ion and Na ions molar ratio range, Fe ions and Na ion ratios are too big, and iron cannot precipitate completely, and ratio is too
Small, Na ion concentrations are too high, influence sinking speed.If Fe3+With Na+Concentration ratio be more than 1:When 0.3, iron in acidleach filtrate from
Son cannot be precipitated fully, not only influence the rate of recovery of iron, also be unfavorable for realizing efficiently separating for iron and scandium.Pass through in the present invention
It is 1.3-1.6 to control and add the pH value of acidleach filtrate after sodium hydroxide and water, and controls Fe3+With Na+Concentration ratio be 1:(0.3-
0.6), it can be not only NaFe3(SO4)2(OH)6Suitable acid condition is improved, enables the iron ion in acidleach filtrate abundant
Precipitation, moreover it is possible to make the iron polymeric form that reaction generates be deposited in stable under acidic conditions presence, avoid iron polymeric form precipitation from occurring
Decompose and influence the separation of iron and scandium.Thus, efficiently separating for iron and scandium can be not only realized, moreover it is possible to further improve in red mud
The rate of recovery of iron.
According to a particular embodiment of the invention, the temperature of the heavy iron reaction can be 90-110 degrees Celsius, and the time can be with
For 55-95 minutes.Thus, it is possible to enable the iron ion in acidleach filtrate fully to precipitate, and then realize effective point of iron and scandium
From.
According to a particular embodiment of the invention, the temperature of the heavy iron reaction can preferably 95-105 degrees Celsius, and the time can
With 60-90 minutes preferred.Inventor has found that iron temperature of sinking is too low, it is impossible to the polymer of siderotil is formed, and temperature is too high, is formed
Siderotil polymer can decompose again.The separating effect of iron and scandium can be further improved by using above-mentioned temperature range, and then
The rate of recovery of iron and the follow-up efficiency for proposing scandium processing can be further improved.
Second filter 400
According to an embodiment of the invention, the second filter 400 has heavy iron injection point 410,420 and of filtrate (liquid containing scandium
Iron content precipitation outlet 430, heavy iron injection point 410 are connected with heavy iron serum outlet 340, and suitable for being carried out to heavy iron slurries
Filter, to obtain filtrate containing scandium and iron content precipitation.
First roaster 500
According to an embodiment of the invention, the first roaster 500 has iron content precipitation entrance 510, gas vent 520 and iron oxide red
Outlet 530, iron content precipitates entrance 510 and is connected with iron content precipitation outlet 430, and is carried out suitable for being precipitated to iron content at the first roasting
Reason, to decompose water outlet and sulfur dioxide, and obtains iron oxide red.
According to an embodiment of the invention, the first calcination process is carried out by being precipitated to iron content, carbon containing precipitation NaFe can be made3
(SO4)2(OH)6Decompose, and generate water, sulfur dioxide and Fe2O3, water and sulfur dioxide are volatized into flue, finally obtain Fe2O3
Grade is more than 99% iron oxide red product.
According to a particular embodiment of the invention, the temperature of the first calcination process can be 850-1050 degrees Celsius.The present invention
In by using above-mentioned roasting condition, iron content precipitation can be made fully to decompose and then obtain high-grade iron oxide red.
According to a particular embodiment of the invention, the temperature of the first calcination process can be preferably 900-1000 degrees Celsius.By
This, can not only make iron content precipitation fully to decompose and then obtain high-grade iron oxide red, moreover it is possible to further improve the first roasting
The efficiency of processing.
According to a particular embodiment of the invention, the iron content being obtained by filtration can be precipitated and is carried out again after being washed and being dried
First calcination process, thus, it is possible to remove the free sodium ion being attached in iron content precipitation.
Concentration and settlement groove 600
According to an embodiment of the invention, concentration and settlement groove 600 has filtrate inlet containing scandium 610, sodium carbonate entrance 620 and sinks
Scandium serum outlet 630, filtrate inlet containing scandium 610 are connected with filtrate (liquid containing scandium 420, and dense suitable for being evaporated to filtrate containing scandium
Contracting, to obtain concentrate containing scandium, sodium carbonate is added into concentrate containing scandium and is heated to seething with excitement, to make scandium ion and carbonic acid
Radical ion forms carbonate deposition.
According to a particular embodiment of the invention, the concentration that scandium ion after concentrating is evaporated to filtrate containing scandium can be 8-
10g/L.Thus, it is possible to further improve the efficiency for proposing scandium processing and the rate of recovery of scandium.Scandium ion concentration is too low, increases scandium solution
Amount, while scandium ion concentration is too low, is unfavorable for trapping of the carbonate to scandium ion, scandium ion concentration is too high, can cause carbonate
Solubility declines, the same collecting rate for influencing scandium.
According to a particular embodiment of the invention, the concentration of the sodium carbonate added into concentrate containing scandium can be 12-18g/
L.Thus, it is possible to further improve the efficiency of scandium ion and carbanion formation carbonate deposition.Inventor's discovery, sodium carbonate
Additive amount can be determined according to the concentration of scandium ion in solution, when concentration of sodium carbonate is too low, the collecting rate of scandium can be caused too
Low, carbonate concentration is excessive, can largely influence the pH of solution, can equally be adversely affected to the sealed Belt of scandium.And then
The concentration of the sodium carbonate added into concentrate containing scandium can be that 12-18g/L is optimal, can further improve scandium ion and carbon
Acid ion forms the efficiency of carbonate deposition.
3rd filter 700
According to an embodiment of the invention, the 3rd filter 700 has heavy scandium injection point 710,720 and of outlet is precipitated containing scandium
Filtrate (liquid 730, heavy scandium injection point 710 are connected with heavy scandium serum outlet 630, and obtain sinking containing scandium suitable for the heavy scandium slurries of filtering
Form sediment.
Second roaster 800
According to an embodiment of the invention, the second roaster 800 has containing scandium precipitation entrance 810 and scandium oxide outlet
820, precipitate entrance containing scandium and be connected with 810 containing scandium precipitation outlet 720, and the second calcination process is carried out suitable for scandium precipitation will be contained, with
Just scandium oxide is obtained.
According to a particular embodiment of the invention, by carrying out the second calcination process to being precipitated containing scandium, product can be prepared
Position is not less than 98% scandium oxide.
According to a particular embodiment of the invention, it can will contain after scandium precipitation is washed and dried and carry out again at the second roasting
Reason.Thus, it is possible to further improve the grade for the scandium oxide being prepared.
According to a particular embodiment of the invention, the temperature of the second calcination process can be 580-750 degrees Celsius, thus, can
High-grade scandium oxide is effectively prepared.
According to a particular embodiment of the invention, the temperature of the second calcination process can be preferably 600-700 degrees Celsius.By
This, not only can effectively be prepared high-grade scandium oxide, moreover it is possible to further improve the efficiency for preparing scandium oxide.
Embodiment 1
Using TFe contents as 27%, the red mud that scandium content is 85g/t is raw material, in advance by red mud be finely ground to 0.0325mm with
Under.
(1) use concentration to carry out acidleach processing to the red mud after fine grinding in pickling tank for 46% sulfuric acid, remove gangue
Phase, obtains the acidleach filtrate containing iron and scandium, the temperature of wherein acidleach processing is 75 degrees Celsius, and leaching time is 55 minutes, acid
Sulfuric acid is continuously added during leaching, it is ensured that after 46% or so, acidleach, the leaching rate of iron is the concentration of sulfuric acid in pickling tank
88%, the leaching rate of scandium is 92%；
(2) it is 1.35 that sodium hydroxide and water are added into acidleach filtrate to pH value is adjusted, while ensures the Fe in solution3+With
Na+Ion concentration be 1:0.4, solution temperature is increased to 98 DEG C and carries out heavy iron reaction, forms NaFe3(SO4)2(OH)6's
Iron polymeric form precipitates, and cold filtration obtains filtrate containing scandium and iron content precipitation NaFe3(SO4)2(OH)6, wherein, sink the iron reaction time
For 65 minutes；
(3) scandium filtrate will be contained to carry out proposing scandium processing, be specifically as follows：Scandium filtrate concentration and evaporation to scandium ion concentration, which will be contained, is
8.5g/L, then adds the Na that concentration is 12g/L2CO3, solution is heated to seething with excitement after stirring evenly, makes scandium ion and carbonate
Carbonate deposition is formed, obtains precipitating containing scandium after cold filtration, calcination process is carried out to being precipitated containing scandium under 600 degrees Celsius, obtains
It is more than 98% scandium oxide to grade；
(4) iron content is precipitated under 920 degrees Celsius and carries out the first calcination process, obtain Fe2O3Grade is more than 99% iron oxide red
Product.
Embodiment 2
Using TFe contents as 29%, the red mud that scandium content is 105g/t is raw material, in advance by red mud be finely ground to 0.0325mm with
Under.
(1) use concentration to carry out acidleach processing to the red mud after fine grinding in pickling tank for 50% sulfuric acid, remove gangue
Phase, obtains the acidleach filtrate containing iron and scandium, the temperature of wherein acidleach processing is 83 degrees Celsius, and leaching time is 68 minutes, acid
Sulfuric acid is continuously added during leaching, it is ensured that after 48% or so, acidleach, the leaching rate of iron is the concentration of sulfuric acid in pickling tank
90%, the leaching rate of scandium is 93.5%；
(2) it is 1.45 that sodium hydroxide and water are added into acidleach filtrate to pH value is adjusted, while ensures the Fe in solution3+With
Na+Ion concentration be 1:0.5, solution temperature is increased to 102 DEG C and carries out heavy iron reaction, forms NaFe3(SO4)2(OH)6's
Iron polymeric form precipitates, and cold filtration obtains filtrate containing scandium and iron content precipitation NaFe3(SO4)2(OH)6, wherein, sink the iron reaction time
For 75 minutes；
(3) scandium filtrate will be contained to carry out proposing scandium processing, be specifically as follows：Scandium filtrate concentration and evaporation to scandium ion concentration, which will be contained, is
18.1g/L, then adds the Na that concentration is 15g/L2CO3, solution is heated to seething with excitement after stirring evenly, makes scandium ion and carbonic acid
Root forms carbonate deposition, obtains precipitating containing scandium after cold filtration, and calcination process is carried out to being precipitated containing scandium under 630 degrees Celsius,
Obtain grade and be more than 98% scandium oxide；
(4) iron content is precipitated under 950 degrees Celsius and carries out the first calcination process, obtain Fe2O3Grade is more than 99% iron oxide red
Product.
Embodiment 2
Using TFe contents as 32%, the red mud that scandium content is 130g/t is raw material, in advance by red mud be finely ground to 0.0325mm with
Under.
(1) use concentration to carry out acidleach processing to the red mud after fine grinding in pickling tank for 55% sulfuric acid, remove gangue
Phase, obtains the acidleach filtrate containing iron and scandium, the temperature of wherein acidleach processing is 90 degrees Celsius, and leaching time is 75 minutes, acid
Sulfuric acid is continuously added during leaching, it is ensured that after 54% or so, acidleach, the leaching rate of iron is the concentration of sulfuric acid in pickling tank
91.5%, the leaching rate of scandium is 94.5%；
(2) it is 1.6 that sodium hydroxide and water are added into acidleach filtrate to pH value is adjusted, while ensures the Fe in solution3+With
Na+Ion concentration be 1:0.6, solution temperature is increased to 105 DEG C and carries out heavy iron reaction, forms NaFe3(SO4)2(OH)6's
Iron polymeric form precipitates, and cold filtration obtains filtrate containing scandium and iron content precipitation NaFe3(SO4)2(OH)6, wherein, sink the iron reaction time
For 85 minutes；
(3) scandium filtrate will be contained to carry out proposing scandium processing, be specifically as follows：Scandium filtrate concentration and evaporation to scandium ion concentration, which will be contained, is
10g/L, then adds the Na that concentration is 18g/L2CO3, solution is heated to seething with excitement after stirring evenly, makes scandium ion and carbonate
Carbonate deposition is formed, obtains precipitating containing scandium after cold filtration, calcination process is carried out to being precipitated containing scandium under 680 degrees Celsius, obtains
It is more than 98% scandium oxide to grade；
(4) iron content is precipitated under 980 degrees Celsius and carries out the first calcination process, obtain Fe2O3Grade is more than 99% iron oxide red
Product.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
Combined in an appropriate manner in a or multiple embodiments or example.In addition, without conflicting with each other, the technology of this area
Different embodiments or example described in this specification and different embodiments or exemplary feature can be combined by personnel
And combination.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of Extracting Scandium from Red Mud and the method for preparing iron oxide red, it is characterised in that including：
(1) red mud is subjected to acidleach processing and filtered, to remove gangue phase, obtain the acidleach filtrate containing iron and scandium；
(2) sodium hydroxide is added into the acidleach filtrate and water adjusts pH value, and heats and carries out heavy iron reaction, to be formed
NaFe3(SO4)2(OH)6Iron polymeric form precipitation, be obtained by filtration filtrate containing scandium and iron content precipitation；
(3) filtrate containing scandium is carried out proposing scandium processing, to obtain scandium oxide；
(4) iron content is precipitated and carries out the first calcination process, to decompose water outlet and sulfur dioxide, and obtain iron oxide red.
2. Extracting Scandium from Red Mud according to claim 1 and the method for preparing iron oxide red, it is characterised in that further comprise：In advance
Red mud is finely ground to below 0.0325mm.
3. Extracting Scandium from Red Mud according to claim 1 and the method for preparing iron oxide red, it is characterised in that in step (1), utilization is dense
Spend and acidleach processing is carried out to the red mud for the sulfuric acid of 45-55%.
4. Extracting Scandium from Red Mud according to claim 3 and the method for preparing iron oxide red, it is characterised in that the temperature of the acidleach processing
Spend for 70-90 degrees Celsius, preferably 75-85 degrees Celsius, the time is 50-75 minutes, preferably 55-70 minutes.
5. Extracting Scandium from Red Mud according to claim 1 and the method for preparing iron oxide red, it is characterised in that in step (2),
It is 1.3-1.6 that the sodium hydroxide and water are added into the acidleach filtrate to pH value is adjusted, and controls Fe3+With Na+'s
Concentration ratio is 1:(0.3-0.6),
Optionally, the temperature of the heavy iron reaction is 90-110 degrees Celsius, preferably 95-105 degrees Celsius, the heavy iron reaction when
Between be 55-95 minutes, preferably 60-90 minutes.
6. Extracting Scandium from Red Mud according to claim 1 and the method for preparing iron oxide red, it is characterised in that in step (4), described the
The temperature of one calcination process is 850-1050 degrees Celsius, preferably 900-1000 degrees Celsius.
7. Extracting Scandium from Red Mud according to claim 1 and the method for preparing iron oxide red, it is characterised in that described to carry scandium processing bag
Include：
Concentration is evaporated to the filtrate containing scandium, to obtain concentrate containing scandium；
Sodium carbonate is added into the concentrate containing scandium and is heated to seething with excitement, to make scandium ion and carbanion form carbonic acid
Salt precipitates, and is obtained by filtration and is precipitated containing scandium；
The precipitation containing scandium is subjected to the second calcination process, to obtain the scandium oxide.
8. Extracting Scandium from Red Mud according to claim 7 and the method for preparing iron oxide red, it is characterised in that in the concentrate containing scandium
The concentration of scandium ion is 8-10g/L,
The concentration of the sodium carbonate is 12-18g/L,
The temperature of second calcination process is 580-750 degrees Celsius, preferably 600-700 degrees Celsius.
A kind of 9. system for the method implemented any one of the claim 1-8 Extracting Scandium from Red Mud and prepare iron oxide red, it is characterised in that
Including：
Pickling tank, the pickling tank have red mud entrance, sulfuric acid entrance and acidleach serum outlet,
First filter, the filter has acidleach injection point, gangue mutually exports and acidleach filtrate (liquid, the acidleach slurry
Liquid entrance is connected with the acidleach serum outlet；
Heavy alum groove, the heavy alum groove has acidleach filtrate inlet, sodium hydroxide entrance, water inlet and heavy iron serum outlet, described
Acidleach filtrate inlet is connected with the acidleach filtrate (liquid；
Second filter, second filter has heavy iron injection point, filtrate (liquid containing scandium and the outlet of iron content precipitation, described
Heavy iron injection point is connected with the heavy iron serum outlet；
First roaster, first roaster have iron content precipitation entrance, gas vent and iron oxide red outlet, the iron content precipitation
Entrance is connected with the outlet of iron content precipitation；
Concentration and settlement groove, the concentration and settlement groove has filtrate inlet containing scandium, sodium carbonate entrance and heavy scandium serum outlet, described to contain
Scandium filtrate inlet is connected with the filtrate (liquid containing scandium；
3rd filter, the 3rd filter have heavy scandium injection point, precipitate outlet and filtrate (liquid, the heavy scandium containing scandium
Injection point is connected with the heavy scandium serum outlet；
Second roaster, second roaster has containing scandium precipitation entrance and scandium oxide outlet, described to be precipitated into containing scandium
Mouth is connected with the outlet containing scandium precipitation.
10. system according to claim 9, it is characterised in that further comprise：
Ore grinding device, the ore grinding device are connected with the red mud entrance of the pickling tank, and suitable for carrying out fine grinding to red mud.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711342553.5A CN107937726A (en) | 2017-12-14 | 2017-12-14 | Extracting Scandium from Red Mud and the method and system for preparing iron oxide red |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981100A (en) * | 2020-12-21 | 2021-06-18 | 中兴环保投资(广西)有限公司 | Comprehensive utilization method of red mud by full wet method |
| CN113046580A (en) * | 2021-03-12 | 2021-06-29 | 中国恩菲工程技术有限公司 | Scandium extraction pretreatment system and treatment method of scandium-containing solution |
-
2017
- 2017-12-14 CN CN201711342553.5A patent/CN107937726A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981100A (en) * | 2020-12-21 | 2021-06-18 | 中兴环保投资(广西)有限公司 | Comprehensive utilization method of red mud by full wet method |
| CN112981100B (en) * | 2020-12-21 | 2022-11-11 | 中兴环保科技(广西)有限公司 | Comprehensive utilization method of red mud by full wet method |
| CN113046580A (en) * | 2021-03-12 | 2021-06-29 | 中国恩菲工程技术有限公司 | Scandium extraction pretreatment system and treatment method of scandium-containing solution |
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