CN104195341B - A kind of red mud is put forward titanium method - Google Patents
A kind of red mud is put forward titanium method Download PDFInfo
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- CN104195341B CN104195341B CN201410461536.3A CN201410461536A CN104195341B CN 104195341 B CN104195341 B CN 104195341B CN 201410461536 A CN201410461536 A CN 201410461536A CN 104195341 B CN104195341 B CN 104195341B
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Abstract
The present invention relates to a kind of red mud and put forward titanium method. its scheme is red mud first to be carried out to water logging dealkalize operation obtain infusion and water logging slag, collect the pH value adjusting agent of infusion as follow-up titanium dioxide hydrolysis operation, the mixed solution of water logging slag and sulfuric acid and citric acid carries out the operation of secondary secondary pickling and obtains tailings and qualified titaniferous pickle liquor in pickling tank, then qualified titaniferous pickle liquor is mixed with organic phase and carry out five grades extraction and obtain saturated organic phase and raffinate, raffinate returns to acidleach operation as leaching agent, saturated organic phase mixes with back washing agent and carries out six grades of back extractions and obtain useless organic phase and strip liquor, after useless organic phase regeneration, be back to extraction operation, the strip liquor operation that is hydrolyzed after dealkalize infusion is adjusted pH value, after hydrolysate calcining, obtain the titanium dioxide product that purity is greater than 99.5%, titanium recovery rate is greater than 80%. the present invention has advantages of that technique is simple, reagent consumption is low, product purity is high, titanium recovery rate is high, waste water can be realized and recycling.
Description
Technical field
The invention belongs to red mud technical field of wet metallurgy, be specifically related to a kind of red mud and put forward titanium method.
Background technology
Red mud is the alkali solid discarded object producing in bauxite into alumina process, is also a kind of secondary mineral resources that contains multiple valuable metal. According to the difference of the bauxite place of production and production technology, in red mud, the kind of valuable metal and content also can be distinguished to some extent, but nearly all contain titanium dioxide in the red mud of various places, and grade is 4%～15%, are one of valuable sources extracting titanium.
At present, the method of extracting titanium from red mud is mainly that sulfuric acid leaching, titaniferous leachate direct hydrolysis, hydrolysate calcining and other processes obtain product titanium dioxide (Zhu Guohai, Wang Keqin, Wanghao, Deng. sulfuric acid leaching red mud slag reclaims the research [J] of titanium dioxide. non-ferrous metal (Smelting Part), 2012,7:23-26; Agatzini, L.S., Oustadakis, P., Tsakiridis, P.E., etal.Titaniumleachingfromredmudbydilutedsulfuricacidatat mosphericpressure[J] .JournalofHazardousMaterials, 2008,157:579-586). Titanium in red mud mainly exists with the mineral forms of perovskite and brockite, be subject to the parcel of other gangue minerals, titanium is wherein extracted in the more difficult leaching of diluted acid, simultaneously owing to also containing the acid consumpting substances such as aluminium oxide, iron oxide, calcium oxide, sodium oxide molybdena, potassium oxide in red mud, conventionally need a large amount of sulfuric acid so put forward titanium process in acidleach, cause the leaching rate of titanium low, the problems such as impurity concentration height such as hydrogen ion and iron, aluminium in pickle liquor. The gained titaniferous pickle liquor operation that is hydrolyzed after NaOH regulates pH value, sodium hydroxide concentration is large, and hydrolysate impurity is many, causes the purity of final products titanium dioxide low.
Therefore, the method exists that leaching process sulfuric acid consumption is large, pH of leaching solution is low, titanium recovery rate is low, impurity content is high, hydrolytic process dosing is large, hydrolysate impurity is many, product titanium dioxide purity is low and the defect such as the acid waste water difficult treatment of technical process generation.
Summary of the invention
Object of the present invention provides a kind of method that can extract high-purity titanium dioxide from red mud for existing weak point in above-mentioned prior art just, and the method meets that leaching process sulfuric acid consumption is low, pH of leaching solution is high, titanium recovery rate is high, hydrolytic process dosing is little, hydrolysate impurity is few, product titanium dioxide purity is high and the requirement of the waste water reusable edible that technical process produces.
Object of the present invention can realize by subordinate's technical measures:
The method that the present invention adopts is red mud to be carried out to water logging dealkalize operation obtain water logging slag and alkaline water immersion liquid, collect dealkalize infusion for subsequent use, then water logging slag is drained in pickling tank, add the mixed liquor of sulfuric acid solution and citric acid to carry out secondary secondary pickling, acidleach finishes rear Separation of Solid and Liquid and obtains tailings and qualified titaniferous pickle liquor, then qualified titaniferous pickle liquor is mixed with extracted organic phase and carries out five grades extraction, after extraction finishes, two are separated and obtain saturated organic phase and raffinate, raffinate returns to acidleach operation as leaching agent, saturated organic phase mixes with the sulfuric acid solution of 1 ~ 2mol/L as back washing agent and carries out six grades of back extractions, after back extraction finishes, two are separated and obtain useless organic phase and strip liquor, useless organic phase is recycled and reused for extraction operation after regeneration operation, the strip liquor operation that is hydrolyzed after above-mentioned dealkalize infusion is adjusted pH value obtains hydrolysate, hydrolysate obtains high purity product titanium dioxide through calcining operation.
Specifically: red mud of the present invention is put forward titanium method and comprised the steps:
A, red mud and water are mixed in tank diameter by liquid-solid mass ratio 5 ~ 10mL/g, being 50 ~ 100 DEG C at water soaking temperature is to stir 60 ~ 180min under 100 ~ 300r/min condition with stirring intensity, after stirring finishes, obtain water logging slag and alkaline water immersion liquid through Separation of Solid and Liquid, collect dealkalize infusion for subsequent use;
B, water logging slag is drained in pickling tank, add the mixed liquor of sulfuric acid solution and citric acid to carry out secondary secondary pickling; Be that 4 ~ 8mL/g, stirring intensity are that 250 ~ 600r/min, extraction temperature are to stir 30 ~ 120min under 70 ~ 100 DEG C of conditions at liquid-solid mass ratio, Separation of Solid and Liquid obtains tailings and pickle liquor, pickle liquor mixes and carries out secondary acidleach with new red mud water logging slag, Separation of Solid and Liquid obtains acid leaching residue and qualified titaniferous pickle liquor, acid leaching residue mixes with raffinate again, after the citric acid that interpolation mass fraction is 2 ~ 8%, carry out secondary pickling, Separation of Solid and Liquid obtains tailings and qualified titaniferous pickle liquor, and titanium leaching rate is greater than 85%; The mixed liquor of described sulfuric acid solution and citric acid is that the citric acid that is 2 ~ 8% by the sulfuric acid solution of 3 ~ 6mol/L and mass fraction mixes;
C, qualified titaniferous pickle liquor is mixed with extracted organic phase and carries out five grades extraction; Be 1:1 ~ 3 comparing O/A, extraction temperature is to shake 3 ~ 8min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new extracted organic phase hybrid extraction, organic phase continues the new qualified titaniferous pickle liquor of extraction until saturated, after five extractions, titanium extraction yield is greater than 98%, and raffinate returns to acidleach operation as leaching agent; Described extracted organic phase consists of N1923, TBP and sulfonated kerosene, and three's volume parts ratio is 5 ~ 10:5 ~ 10:80 ~ 90;
D, using saturated organic phase with mix and carry out six grades of back extractions as the sulfuric acid solution of 1 ~ 2mol/L of back washing agent; Be 5 ~ 10:1 comparing O/A, back extraction temperature is to shake 5 ~ 10min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new saturated organic phase mixing back extraction, after six back extractions, titanium back extraction ratio is greater than 97%; After back extraction finishes, two are separated and obtain useless organic phase and strip liquor;
E, useless organic phase are recycled and reused for extraction operation after regeneration operation; Useless organic phase is mixed with the ammonium bicarbonate soln that is 5 ~ 20% as the mass fraction of regenerative agent, be 1:1 ~ 4 comparing O/A, regeneration times is 1 ~ 3 time, and regeneration temperature is to shake 6 ~ 12min under 30 ~ 50 DEG C of conditions, two be separated after organic phase can be used for extraction operation next time;
F, strip liquor is added to red mud water logging dealkalize liquid, and to adjust pH value be 3.2 ~ 3.7, be heated to 95 ~ 100 DEG C, after stirring 120 ~ 180min, Separation of Solid and Liquid obtains titanium oxide hydrolysate product, and percent hydrolysis is greater than 99%, and hydrolysate obtains high purity product titanium dioxide through calcining operation.
Calcine technology described in the present invention is by the washing of titanium oxide hydrolysate product, dries and is placed in high temperature furnace, and be to react 120 ~ 240min under 500 ~ 700 DEG C of conditions in calcining heat.
Products obtained therefrom titanium dioxide purity of the present invention is greater than 99.5%, and titanium recovery rate is greater than 80%.
Beneficial effect of the present invention is as follows:
Because the present invention adopts red mud water logging dealkalize operation, reduce follow-up acidleach and carried the acid consumpting substance such as sodium oxide molybdena and potassium oxide of titanium process, changed the granule-morphology of red mud simultaneously, make red mud form loose porous shape, being conducive to sulfuric acid spreads to red mud granule interior, accelerate acidleach and put forward titanium reaction rate, promoted the stripping of titanium in red mud. By the operation of secondary secondary pickling, make full use of titaniferous pickle liquor and raffinate, reduced sulfuric acid consumption, improved titanium leaching rate and pickle liquor pH value, realized technique waste water and recycled. Carry out acidleach by interpolation citric acid as leaching agent and carry titanium, accelerate perovskite and brookite crystal structural damage, be conducive to sulfuric acid and titanium dioxide generation chemical reaction, reduce sulfuric acid consumption, improve reaction rate. In the qualified pickle liquor of gained, except titanium, also contain the impurity such as a large amount of iron, aluminium, be not suitable for being directly hydrolyzed operation, adopt five grades extraction and six grades of back extraction operations, in raising pickle liquor, titanium concentration is more than 10 times, and the impurity separation rates such as while titanium and iron, aluminium are greater than 90%. In titaniferous strip liquor, titanium concentration is high, impurity content is few, its operation that can directly be hydrolyzed after pH value is adjusted in alkaline water immersion liquid, without another hydro-oxidation sodium medicament, hydrolysate dopant species is few and content is low, hydrolysate is after washing calcining operation, can obtain the titanium dioxide product that purity is greater than 99.5%, titanium recovery rate is greater than 80%.
Therefore, the present invention has advantages of the waste water reusable edible that sulfuric acid consumption is low in red mud leaching process, pH of leaching solution is high, titanium recovery rate is high, hydrolytic process dosing is little, hydrolysate impurity is few, product titanium dioxide purity is high, technical process produces.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
The present invention is further described below with reference to embodiment (accompanying drawing):
For avoiding repeated description, now technical parameter the unification related specific embodiment of the invention is described below: described water logging dealkalize technique is for to be mixed in red mud and water in tank diameter by liquid-solid mass ratio 5 ~ 10mL/g, being 50 ~ 100 DEG C at water soaking temperature is to stir 60 ~ 180min under 100 ~ 300r/min condition with stirring intensity, after stirring finishes, obtains infusion and water logging slag through Separation of Solid and Liquid; Extracted organic phase consists of N1923, TBP and sulfonated kerosene, and three's volume parts ratio is 5 ~ 10:5 ~ 10:80 ~ 90; Useless organic phase regeneration technology is that useless organic phase is mixed with the ammonium bicarbonate soln that is 5 ~ 20% as the mass fraction of regenerative agent, is being in a ratio of 1:1 ~ 4, and regeneration times is 1 ~ 3 time, and regeneration temperature is to shake 6 ~ 12min under 30 ~ 50 DEG C of conditions; Hydrolysis process is 3.2 ~ 3.7 for strip liquor being added to red mud water logging dealkalize liquid adjustment pH value, is heated to 95 ~ 100 DEG C, and after stirring 120 ~ 180min, Separation of Solid and Liquid obtains titanium oxide hydrolysate product; Calcine technology is by the washing of titanium oxide hydrolysate product, dries and is placed in high temperature furnace, and be to react 120 ~ 240min under 500 ~ 700 DEG C of conditions in calcining heat. In specific embodiment, repeat no more.
Embodiment 1
Water logging slag is drained in pickling tank, add the mixed liquor of sulfuric acid solution and citric acid to carry out secondary secondary pickling according to liquid-solid mass ratio 4 ~ 8mL/g; The mixed liquor of described sulfuric acid solution and citric acid is that the citric acid that is 6 ~ 8% by the sulfuric acid solution of 3 ~ 4mol/L and mass fraction mixes; Then be that 250 ~ 400r/min, extraction temperature are to stir 60 ~ 120min under 70 ~ 100 DEG C of conditions at stirring intensity, Separation of Solid and Liquid obtains tailings and pickle liquor, pickle liquor mixes and carries out secondary acidleach with new red mud water logging slag, Separation of Solid and Liquid obtains acid leaching residue and qualified titaniferous pickle liquor, acid leaching residue mixes with raffinate again, after the citric acid that interpolation mass fraction is 6 ~ 8%, carry out secondary pickling, Separation of Solid and Liquid obtains tailings and qualified titaniferous pickle liquor, and titanium leaching rate is greater than 85%. Then qualified titaniferous pickle liquor is mixed with extracted organic phase, be 1:1 ~ 2 comparing O/A, extraction temperature is to shake 3 ~ 8min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new extracted organic phase hybrid extraction, organic phase continues the new qualified titaniferous pickle liquor of extraction until saturated, and after five extractions, titanium extraction yield is greater than 98%, and raffinate returns to acidleach as leaching agent. Again saturated organic phase is mixed with the sulfuric acid solution as 1 ~ 2mol/L of back washing agent, be 8 ~ 10:1 comparing O/A, back extraction temperature is to shake 5 ~ 10min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new saturated organic phase mixing back extraction, after six back extractions, titanium back extraction ratio is greater than 97%. Titaniferous strip liquor products obtained therefrom titanium dioxide purity after hydrolysis, calcine technology is greater than 99.9%, and titanium recovery rate is greater than 80%.
Embodiment 2
Water logging slag is drained in pickling tank, add the mixed liquor of sulfuric acid solution and citric acid to carry out secondary secondary pickling according to liquid-solid mass ratio 4 ~ 8mL/g; The mixed liquor of described sulfuric acid solution and citric acid is that the citric acid that is 4 ~ 6% by the sulfuric acid solution of 4 ~ 5mol/L and mass fraction mixes; Then be that 300 ~ 500r/min, extraction temperature are to stir 45 ~ 90min under 70 ~ 100 DEG C of conditions at stirring intensity, Separation of Solid and Liquid obtains tailings and pickle liquor, pickle liquor mixes and carries out secondary acidleach with new red mud water logging slag, Separation of Solid and Liquid obtains acid leaching residue and qualified titaniferous pickle liquor, acid leaching residue mixes with raffinate again, after the citric acid that interpolation mass fraction is 4 ~ 6%, carry out secondary pickling, Separation of Solid and Liquid obtains tailings and qualified titaniferous pickle liquor, and titanium leaching rate is greater than 89%. Then qualified titaniferous pickle liquor is mixed with extracted organic phase, be 1:2 ~ 3 comparing O/A, extraction temperature is to shake 3 ~ 8min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new extracted organic phase hybrid extraction, organic phase continues the new qualified titaniferous pickle liquor of extraction until saturated, and after five extractions, titanium extraction yield is greater than 99%, and raffinate returns to acidleach as leaching agent. Again saturated organic phase is mixed with the sulfuric acid solution as 1 ~ 2mol/L of back washing agent, be 5 ~ 8:1 comparing O/A, back extraction temperature is to shake 5 ~ 10min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new saturated organic phase mixing back extraction, after six back extractions, titanium back extraction ratio is greater than 98%. Titaniferous strip liquor products obtained therefrom titanium dioxide purity after hydrolysis, calcine technology is greater than 99.7%, and titanium recovery rate is greater than 82%.
Embodiment 3
Water logging slag is drained in pickling tank, add the mixed liquor of sulfuric acid solution and citric acid to carry out secondary secondary pickling according to liquid-solid mass ratio 4 ~ 8mL/g; The mixed liquor of described sulfuric acid solution and citric acid is that the citric acid that is 2 ~ 4% by the sulfuric acid solution of 5 ~ 6mol/L and mass fraction mixes; Then be that 400 ~ 600r/min, extraction temperature are to stir 30 ~ 60min under 70 ~ 100 DEG C of conditions at stirring intensity, Separation of Solid and Liquid obtains tailings and pickle liquor, pickle liquor mixes and carries out secondary acidleach with new red mud water logging slag, Separation of Solid and Liquid obtains acid leaching residue and qualified titaniferous pickle liquor, acid leaching residue mixes with raffinate again, after the citric acid that interpolation mass fraction is 2 ~ 4%, carry out secondary pickling, Separation of Solid and Liquid obtains tailings and qualified titaniferous pickle liquor, and titanium leaching rate is greater than 95%. Then qualified titaniferous pickle liquor is mixed with extracted organic phase, be 1:1 ~ 3 comparing O/A, extraction temperature is to shake 3 ~ 8min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new extracted organic phase hybrid extraction, organic phase continues the new qualified titaniferous pickle liquor of extraction until saturated, and after five extractions, titanium extraction yield is greater than 99%, and raffinate returns to acidleach as leaching agent. Again saturated organic phase is mixed with the sulfuric acid solution as 1 ~ 2mol/L of back washing agent, be 6 ~ 10:1 comparing O/A, back extraction temperature is to shake 5 ~ 10min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new saturated organic phase mixing back extraction, after six back extractions, titanium back extraction ratio is greater than 98%. Titaniferous strip liquor products obtained therefrom titanium dioxide purity after hydrolysis, calcine technology is greater than 99.5%, and titanium recovery rate is greater than 85%.
The specific embodiment of the present invention adopts red mud water logging dealkalize operation, reduce follow-up acidleach and carried the acid consumpting substance such as sodium oxide molybdena and potassium oxide of titanium process, changed the granule-morphology of red mud simultaneously, make red mud form loose porous shape, being conducive to sulfuric acid spreads to red mud granule interior, accelerate acidleach and put forward titanium reaction rate, promoted the stripping of titanium in red mud. By the operation of secondary secondary pickling, make full use of titaniferous pickle liquor and raffinate, reduced sulfuric acid consumption, improved titanium leaching rate and pickle liquor pH value, realized technique waste water and recycled. Carry out acidleach by interpolation citric acid as leaching agent and carry titanium, accelerate perovskite and brookite crystal structural damage, be conducive to sulfuric acid and titanium dioxide generation chemical reaction, reduce sulfuric acid consumption, improve reaction rate. In the qualified pickle liquor of gained, except titanium, also contain the impurity such as a large amount of iron, aluminium, be not suitable for being directly hydrolyzed operation, adopt five grades extraction and six grades of back extraction operations, in raising pickle liquor, titanium concentration is more than 10 times, and the impurity separation rates such as while titanium and iron, aluminium are greater than 90%. In titaniferous strip liquor, titanium concentration is high, impurity content is few, its operation that can directly be hydrolyzed after pH value is adjusted in alkaline water immersion liquid, without another hydro-oxidation sodium medicament, hydrolysate dopant species is few and content is low, hydrolysate is after washing calcining operation, can obtain the titanium dioxide product that purity is greater than 99.5%, titanium recovery rate is greater than 80%.
Therefore, the present invention has advantages of the waste water reusable edible that sulfuric acid consumption is low in red mud leaching process, pH of leaching solution is high, titanium recovery rate is high, hydrolytic process dosing is little, hydrolysate impurity is few, product titanium dioxide purity is high, technical process produces.
Claims (3)
1. red mud is put forward a titanium method, it is characterized in that: described method comprises the steps:
A, red mud and water are mixed in tank diameter than 5 ~ 10mL/g by liquid-solid volume mass, being 50 ~ 100 DEG C at water soaking temperature is to stir 60 ~ 180min under 100 ~ 300r/min condition with stirring intensity, after stirring finishes, obtain water logging slag and dealkalize infusion through Separation of Solid and Liquid, collect dealkalize infusion for subsequent use;
B, water logging slag is drained in pickling tank, add the mixed liquor of sulfuric acid solution and citric acid to carry out secondary secondary pickling; Be that 4 ~ 8mL/g, stirring intensity are that 250 ~ 600r/min, extraction temperature are to stir 30 ~ 120min under 70 ~ 100 DEG C of conditions at liquid-solid volume mass ratio, Separation of Solid and Liquid obtains tailings and pickle liquor, pickle liquor mixes and carries out secondary acidleach with new red mud water logging slag, Separation of Solid and Liquid obtains acid leaching residue and qualified titaniferous pickle liquor, acid leaching residue mixes with raffinate again, after the citric acid that interpolation mass fraction is 2 ~ 8%, carry out secondary pickling, Separation of Solid and Liquid obtains tailings and qualified titaniferous pickle liquor, and titanium leaching rate is greater than 85%; The mixed liquor of described sulfuric acid solution and citric acid is that the citric acid that is 2 ~ 8% by the sulfuric acid solution of 3 ~ 6mol/L and mass fraction mixes;
C, qualified titaniferous pickle liquor is mixed with extracted organic phase and carries out five grades extraction; Be 1:1 ~ 3 comparing O/A, extraction temperature is to shake 3 ~ 8min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new extracted organic phase hybrid extraction, organic phase continues the new qualified titaniferous pickle liquor of extraction until saturated, after five extractions, titanium extraction yield is greater than 98%, and raffinate returns to acidleach operation as leaching agent; Described extracted organic phase consists of N1923, TBP and sulfonated kerosene, and three's volume parts ratio is 5 ~ 10:5 ~ 10:80 ~ 90;
D, using saturated organic phase with mix and carry out six grades of back extractions as the sulfuric acid solution of 1 ~ 2mol/L of back washing agent; Be 5 ~ 10:1 comparing O/A, back extraction temperature is to shake 5 ~ 10min under 20 ~ 50 DEG C of conditions, two be separated after, liquid phase again with new saturated organic phase mixing back extraction, after six back extractions, titanium back extraction ratio is greater than 97%; After back extraction finishes, two are separated and obtain useless organic phase and strip liquor;
E, useless organic phase are recycled and reused for extraction operation after regeneration operation; Useless organic phase is mixed with the ammonium bicarbonate soln that is 5 ~ 20% as the mass fraction of regenerative agent, be 1:1 ~ 4 comparing O/A, regeneration times is 1 ~ 3 time, and regeneration temperature is to shake 6 ~ 12min under 30 ~ 50 DEG C of conditions, two be separated after organic phase for extraction operation next time;
F, strip liquor is added to red mud dealkalization infusion, and to adjust pH value be 3.2 ~ 3.7, be heated to 95 ~ 100 DEG C, after stirring 120 ~ 180min, Separation of Solid and Liquid obtains the hydrolysate of titanium dioxide, and percent hydrolysis is greater than 99%, and hydrolysate obtains high purity product titanium dioxide through calcining operation.
2. red mud according to claim 1 is put forward titanium method, it is characterized in that: described calcine technology, for by the washing of titanium dioxide hydrolysate, is dried and is placed in high temperature furnace, is to react 120 ~ 240min under 500 ~ 700 DEG C of conditions in calcining heat.
3. red mud according to claim 1 is put forward titanium method, it is characterized in that: products obtained therefrom titanium dioxide purity is greater than 99.5%, and titanium recovery rate is greater than 80%.
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| CN104894384B (en) * | 2015-06-26 | 2017-03-08 | 河南理工大学 | A kind of red mud puies forward titanium technique |
| CN105170307B (en) * | 2015-09-29 | 2017-05-10 | 河南理工大学 | Red-mud citric acid dealkalizing technique |
| CN107475521B (en) * | 2017-08-30 | 2019-02-15 | 河南理工大学 | A kind of method that red mud Selectively leaching extracts titanium |
| CN109336236B (en) * | 2018-12-10 | 2021-05-18 | 河南理工大学 | Method for preparing aluminum-iron flocculating agent from red mud |
| CN115652113B (en) * | 2022-10-28 | 2023-10-10 | 广东省科学院资源利用与稀土开发研究所 | Method for extracting and separating rare earth from ocean rare earth sulfuric acid leaching solution |
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| US6248302B1 (en) * | 2000-02-04 | 2001-06-19 | Goldendale Aluminum Company | Process for treating red mud to recover metal values therefrom |
| CN103131854A (en) * | 2013-03-18 | 2013-06-05 | 广西冶金研究院 | Method for comprehensively recovering scandium and titanium by leaching red mud with titanium white waste acid |
| CN103589872A (en) * | 2013-11-18 | 2014-02-19 | 中国铝业股份有限公司 | Method for recovering titanium from red mud slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6248302B1 (en) * | 2000-02-04 | 2001-06-19 | Goldendale Aluminum Company | Process for treating red mud to recover metal values therefrom |
| CN103131854A (en) * | 2013-03-18 | 2013-06-05 | 广西冶金研究院 | Method for comprehensively recovering scandium and titanium by leaching red mud with titanium white waste acid |
| CN103589872A (en) * | 2013-11-18 | 2014-02-19 | 中国铝业股份有限公司 | Method for recovering titanium from red mud slag |
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