CN115772608A - Method for extracting aluminum from clay type mineral containing aluminum - Google Patents
Method for extracting aluminum from clay type mineral containing aluminum Download PDFInfo
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- CN115772608A CN115772608A CN202211531927.9A CN202211531927A CN115772608A CN 115772608 A CN115772608 A CN 115772608A CN 202211531927 A CN202211531927 A CN 202211531927A CN 115772608 A CN115772608 A CN 115772608A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 31
- 239000011707 mineral Substances 0.000 title claims abstract description 31
- 239000004927 clay Substances 0.000 title claims abstract description 28
- 238000002386 leaching Methods 0.000 claims abstract description 61
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 20
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 14
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 14
- HSEYYGFJBLWFGD-UHFFFAOYSA-N 4-methylsulfanyl-2-[(2-methylsulfanylpyridine-3-carbonyl)amino]butanoic acid Chemical compound CSCCC(C(O)=O)NC(=O)C1=CC=CN=C1SC HSEYYGFJBLWFGD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000013078 crystal Substances 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 14
- 239000004411 aluminium Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 11
- 239000004566 building material Substances 0.000 claims description 8
- 239000002734 clay mineral Substances 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910001570 bauxite Inorganic materials 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 229910052934 alunite Inorganic materials 0.000 description 1
- 239000010424 alunite Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052664 nepheline Inorganic materials 0.000 description 1
- 239000010434 nepheline Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for extracting aluminum from an aluminum-containing clay mineral, which comprises the following steps: 1) Roasting the aluminum-containing clay type mineral powder, and grinding the roasted powder; 2) Mixing the ground roasting material obtained in the step 1) with sulfuric acid, uniformly stirring, and roasting and curing again to obtain a roasting clinker; 3) Leaching the roasted clinker obtained in the step 2) with hot water, and then carrying out solid-liquid separation to obtain a leaching solution and leaching residues; 4) Adding ammonium sulfate into the leachate obtained in the step 3), cooling and crystallizing, and performing solid-liquid separation to obtain aluminum ammonium sulfate crystals; the invention has high utilization rate of raw materials and low requirement on equipment, and is beneficial to industrial mass production.
Description
Technical Field
The invention relates to the technical field of mineral extraction and utilization, in particular to a method for extracting aluminum from an aluminum-containing clay mineral.
Background
Bauxite is the most important aluminum ore resource in the world, and then alunite, nepheline, clay and the like are used, and the process is used for extracting aluminum from clay type aluminum ore. The aluminum extraction process is divided into an alkaline method, an acid-base combination method and a thermal method. When the alumina is produced by the alkaline method, alkali (NaOH or Na) is used 2 CO 3 ) The aluminum ore is treated to convert the alumina in the ore to a sodium aluminate solution. Impurities such as iron and titanium in the ore and most of silicon become insoluble compounds. The insoluble residue (red mud) is separated from the solution, washed and discarded or subjected to a comprehensive treatment to recover useful components therein. The alkaline process for producing alumina has various processes such as Bayer process, sintering process, bayer-sintering combined process and the like. However, the alkaline process produces a large amount of red mud as a byproduct, which is likely to cause environmental pollution. The acid method is to treat an aluminum-containing raw material with inorganic acid such as nitric acid, hydrochloric acid or sulfuric acid to obtain an acidic aqueous solution of a corresponding aluminum salt, then to precipitate the aluminum salt by a crystallization method, or to precipitate the aluminum in the form of aluminum hydroxide by neutralization with alkali, and finally to obtain aluminum oxide by calcination, but the extraction rate of the aluminum is not high.
In summary, in order to solve the problems of the alkaline method and the acid method for treating the aluminum-containing minerals such as bauxite, a method which is low in cost, can ensure the extraction rate and the purity of aluminum and is high in raw material utilization rate, low in equipment requirement and beneficial to industrial scale production is urgently needed to be developed.
Disclosure of Invention
The invention provides a method for extracting aluminum from an aluminum-containing clay mineral.
The scheme of the invention is as follows:
a process for extracting aluminium from an aluminium-containing clay-type mineral, comprising the steps of:
1) Roasting the aluminum-containing clay type mineral powder, and grinding the roasted powder;
2) Mixing the ground roasting material obtained in the step 1) with sulfuric acid, uniformly stirring, and roasting and curing again to obtain roasted clinker;
3) Leaching the roasted clinker obtained in the step 2) with hot water, and then carrying out solid-liquid separation to obtain a leaching solution and leaching residues;
4) Adding ammonium sulfate into the leachate obtained in the step 3), cooling, crystallizing, and carrying out solid-liquid separation to obtain aluminum ammonium sulfate crystals.
As a preferable technical scheme, the particle size of the aluminum-containing clay type mineral powder before roasting in the step 1) is 50-200 meshes; the roasting temperature in the step 1) is 500-1000 ℃; the roasting time in the step 1) is 1.5-3 h; the particle size of the aluminum-containing clay type mineral which is ground after roasting in the step 1) is 200-500 meshes.
As a preferred technical scheme, the ground roasted material in the step 2) is mixed with sulfuric acid, and the mixing mass ratio is 1:1 to 5; the concentration of the sulfuric acid in the step 2) is 90wt% -98 wt%.
As a preferable technical scheme, the temperature of the secondary roasting in the step 2) is 200-300 ℃; the roasting time in the step 2) is 0.5-1.5 h.
As a preferred technical scheme, in the step 3), the roasted clinker is leached by hot water, and the mass ratio of the roasted clinker to the hot water is 1:2 to 10; the leaching temperature in the step 3) is 90-100 ℃; the leaching time in the step 3) is 0.5-2 h.
As a preferred technical scheme, the leaching residue in the step 3) returns to a hot water leaching stage for multiple times for leaching; and 3) using the leached residues in the step 3) for producing building material products.
As a preferable technical scheme, ammonium sulfate solid is added into the leaching solution in the step 4), and the temperature is reduced to crystallize, wherein the cooling temperature is 0-40 ℃.
Due to the adoption of the technical scheme, the method for extracting the aluminum from the clay mineral containing the aluminum comprises the following steps: 1) Roasting the aluminum-containing clay type mineral powder, and grinding the roasted powder; 2) Mixing the ground roasting material obtained in the step 1) with sulfuric acid, uniformly stirring, and roasting and curing again to obtain roasted clinker; 3) Leaching the roasted clinker obtained in the step 2) with hot water, and then carrying out solid-liquid separation to obtain a leaching solution and leaching residues; 4) Adding ammonium sulfate into the leachate obtained in the step 3), cooling, crystallizing, and carrying out solid-liquid separation to obtain aluminum ammonium sulfate crystals.
The invention has the advantages that:
the invention has high utilization rate of raw materials and low requirement on equipment, and is beneficial to industrial mass production. Roasting the aluminum-containing clay mineral to change the mineral structure of the aluminum-containing clay mineral, wherein during secondary roasting treatment, sulfuric acid reacts with clay bauxite to form soluble aluminum sulfate, so that the leaching rate of aluminum is effectively improved. The method can effectively realize the separation of aluminum and impurity elements; the method has the advantages of simple operation, low requirement on equipment, low energy consumption and raw material cost, good economic benefit and better industrial application prospect.
Drawings
FIG. 1 is a process flow diagram of the method of the present invention.
Detailed Description
In order to make up for the above deficiencies, the present invention provides a method for extracting aluminum from an aluminum-containing clay mineral to solve the above problems in the background art.
A process for extracting aluminium from an aluminium-containing clay-type mineral, comprising the steps of:
1) Roasting the aluminum-containing clay type mineral powder, and grinding the roasted powder;
2) Mixing the ground roasting material obtained in the step 1) with sulfuric acid, uniformly stirring, and roasting and curing again to obtain roasted clinker;
3) Leaching the roasted clinker obtained in the step 2) with hot water, and then carrying out solid-liquid separation to obtain a leaching solution and leaching residues;
4) Adding ammonium sulfate into the leachate obtained in the step 3), cooling and crystallizing, and performing solid-liquid separation to obtain aluminum ammonium sulfate crystals.
The particle size of the aluminum-containing clay type mineral powder before roasting in the step 1) is 50-200 meshes; the roasting temperature in the step 1) is 500-1000 ℃; the roasting time in the step 1) is 1.5-3 h; the particle size of the aluminum-containing clay type mineral which is ground after roasting in the step 1) is 200-500 meshes.
The levigated roasting material in the step 2) is mixed with sulfuric acid, and the mixing mass ratio is 1:1 to 5; the concentration of the sulfuric acid in the step 2) is 90wt% -98 wt%.
The temperature for re-roasting in the step 2) is 200-300 ℃; the roasting time in the step 2) is 0.5-1.5 h.
In the step 3), the roasted clinker is leached by hot water, and the mass ratio of the roasted clinker to the hot water is 1:2 to 10; the leaching temperature in the step 3) is 90-100 ℃; the leaching time in the step 3) is 0.5-2 h.
The leaching residue in the step 3) returns to the hot water leaching stage for multiple times for leaching; and 3) using the leached residues in the step 3) for producing building material products.
Adding ammonium sulfate solid into the leaching solution in the step 4), cooling and crystallizing, wherein the cooling temperature is 0-40 ℃.
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described in the following combined with the specific embodiments.
Example 1
(1) Roasting the aluminum-containing clay type mineral powder with the particle size of 50 meshes at 500 ℃ for 1.5h, and grinding the roasted powder into powder with the particle size of 200 meshes;
(2) Mixing the ground roasted material obtained in the step (1) with sulfuric acid with the concentration of 90wt%, wherein the liquid-solid ratio is 1:1, uniformly stirring, and roasting and curing at 200 ℃ for 0.5h to obtain roasted clinker;
(3) Leaching the roasted clinker obtained in the step (2) with hot water at 90 ℃ for 0.5h, and then carrying out solid-liquid separation, wherein the liquid-solid ratio is 2:1, obtaining leachate and leaching residues; the leached residue can be returned to the hot water leaching stage for leaching again/used for producing building material products.
(4) And (4) adding ammonium sulfate into the leachate obtained in the step (3), cooling to 40 ℃, crystallizing, and performing solid-liquid separation to obtain aluminum ammonium sulfate crystals.
(5) The extraction of aluminum in this example was 81.3%.
Example 2
(1) Roasting 100-mesh aluminum-containing clay type mineral powder at 800 ℃ for 2h, and grinding the roasted powder into 300-mesh powder;
(2) Mixing the ground roasted material obtained in the step (1) with sulfuric acid with the concentration of 92wt%, wherein the liquid-solid ratio is 2:1, uniformly stirring, and roasting and curing at 220 ℃ for 0.5h to obtain roasted clinker;
(3) Leaching the roasted clinker obtained in the step (2) with hot water at the temperature of 92 ℃ for 1h, and then carrying out solid-liquid separation, wherein the liquid-solid ratio is 4:1, obtaining leachate and leaching residues; the leached slag can be returned to the hot water leaching stage for re-leaching/used for producing building material products.
(4) And (4) adding ammonium sulfate into the leachate obtained in the step (3), cooling to 30 ℃, cooling, crystallizing, and performing solid-liquid separation to obtain aluminum ammonium sulfate crystals.
(5) The extraction of aluminum in this example was 85.3%.
Example 3
(1) Roasting the aluminum-containing clay type mineral powder with the particle size of 150 meshes at 700 ℃ for 2.5h, and grinding the roasted powder into powder with the particle size of 400 meshes;
(2) Mixing the ground roasted material obtained in the step (1) with sulfuric acid with the concentration of 96wt%, wherein the liquid-solid ratio is 3:1, uniformly stirring, roasting and curing at 300 ℃ for 1.5h again to obtain roasted clinker;
(3) Leaching the roasted clinker obtained in the step (2) with hot water at 94 ℃ for 2h, and then carrying out solid-liquid separation, wherein the liquid-solid ratio is 4:1, obtaining leachate and leaching residues; the leached slag can be returned to the hot water leaching stage for re-leaching/used for producing building material products.
(4) And (4) adding ammonium sulfate into the leachate obtained in the step (3), cooling to 20 ℃, cooling, crystallizing, and performing solid-liquid separation to obtain aluminum ammonium sulfate crystals.
(5) The extraction of aluminium for this example was 90.5%.
Example 4
(1) Roasting the aluminum-containing clay type mineral powder with the particle size of 200 meshes at 600 ℃ for 2 hours, and grinding the roasted powder into powder with the particle size of 500 meshes;
(2) Mixing the ground roasted material obtained in the step (1) with sulfuric acid with the concentration of 98wt%, wherein the liquid-solid ratio is 3:1, after being uniformly stirred, roasting and curing at 250 ℃ for 0.5h again to obtain roasted clinker;
(3) Leaching the roasted clinker obtained in the step (2) with hot water at the temperature of 98 ℃ for 2 hours, and then carrying out solid-liquid separation, wherein the liquid-solid ratio is 6:1, obtaining leachate and leaching residues; the leached slag can be returned to the hot water leaching stage for re-leaching/used for producing building material products.
(4) And (4) adding ammonium sulfate into the leachate obtained in the step (3), cooling to 10 ℃, cooling for crystallization, and performing solid-liquid separation to obtain aluminum ammonium sulfate crystals.
(5) The extraction of aluminum in this example was 97.7%.
Example 5
1) Roasting the aluminum-containing clay type mineral powder, and grinding the roasted powder;
2) Mixing the ground roasting material obtained in the step 1) with sulfuric acid, uniformly stirring, and roasting and curing again to obtain roasted clinker;
3) Leaching the roasted clinker obtained in the step 2) with hot water, and then carrying out solid-liquid separation to obtain a leaching solution and leaching residues;
4) Adding ammonium sulfate into the leachate obtained in the step 3), cooling and crystallizing, and performing solid-liquid separation to obtain aluminum ammonium sulfate crystals.
The particle size of the aluminum-containing clay type mineral powder before roasting in the step 1) is 50-200 meshes; the roasting temperature in the step 1) is 500-1000 ℃; the roasting time in the step 1) is 1.5-3 h; the particle size of the aluminum-containing clay type mineral which is ground after roasting in the step 1) is 200-500 meshes.
The levigated roasting material in the step 2) is mixed with sulfuric acid, and the mixing mass ratio is 1:5; the sulfuric acid concentration in step 2) was 98wt%.
The temperature for roasting again in the step 2) is 300 ℃; the roasting time in the step 2) is 1.5h.
Leaching the roasted clinker with hot water in the step 3), wherein the mass ratio of the roasted clinker to the hot water is 1:10; the leaching temperature in the step 3) is 100 ℃; the leaching time in the step 3) is 2 hours.
The leaching residue in the step 3) returns to the hot water leaching stage for multiple times for leaching; and 3) using the leached residues in the step 3) for producing building material products.
Adding ammonium sulfate solid into the leaching solution in the step 4), cooling and crystallizing, wherein the cooling temperature is 40 ℃.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A process for extracting aluminium from an aluminium-containing clay-type mineral, comprising the steps of:
1) Roasting the aluminum-containing clay type mineral powder, and grinding the roasted powder;
2) Mixing the ground roasting material obtained in the step 1) with sulfuric acid, uniformly stirring, and roasting and curing again to obtain a roasting clinker;
3) Leaching the roasted clinker obtained in the step 2) with hot water, and then carrying out solid-liquid separation to obtain a leaching solution and leaching residues;
4) Adding ammonium sulfate into the leachate obtained in the step 3), cooling and crystallizing, and performing solid-liquid separation to obtain aluminum ammonium sulfate crystals 。
2. A process according to claim 1 for the extraction of aluminium from minerals of the alumino-clay type, characterized in that: the particle size of the aluminum-containing clay type mineral powder before roasting in the step 1) is 50-200 meshes; the roasting temperature in the step 1) is 500-1000 ℃; the roasting time in the step 1) is 1.5-3 h; the particle size of the aluminum-containing clay type mineral which is ground after roasting in the step 1) is 200-500 meshes.
3. A process for extracting aluminium from minerals of the aluminous clay type according to claim 1, characterized in that: the levigated roasting material in the step 2) is mixed with sulfuric acid, and the mixing mass ratio is 1:1 to 5; the concentration of the sulfuric acid in the step 2) is 90wt% -98 wt%.
4. A process for extracting aluminium from minerals of the aluminous clay type according to claim 1, characterized in that: the temperature for re-roasting in the step 2) is 200-300 ℃; the roasting time in the step 2) is 0.5-1.5 h.
5. A process according to claim 1 for the extraction of aluminium from minerals of the alumino-clay type, characterized in that: leaching the roasted clinker with hot water in the step 3), wherein the mass ratio of the roasted clinker to the hot water is 1:2 to 10; the leaching temperature in the step 3) is 90-100 ℃; the leaching time in the step 3) is 0.5-2 h.
6. A process according to claim 1 for the extraction of aluminium from minerals of the alumino-clay type, characterized in that: the leaching residue in the step 3) returns to the hot water leaching stage for multiple times for leaching; and 3) using the leached residues in the step 3) for producing building material products.
7. A process for extracting aluminium from minerals of the aluminous clay type according to claim 1, characterized in that: adding ammonium sulfate solid into the leaching solution in the step 4), cooling and crystallizing, wherein the cooling temperature is 0-40 ℃.
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| CN202211531927.9A CN115772608A (en) | 2022-12-01 | 2022-12-01 | Method for extracting aluminum from clay type mineral containing aluminum |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920067A (en) * | 2006-09-14 | 2007-02-28 | 北京矿冶研究总院 | Method for extracting aluminum from high-silicon aluminum-containing mineral raw material by acid process |
| CN103421960A (en) * | 2013-08-06 | 2013-12-04 | 昆明理工大学 | Method for efficiently recycling ferro-aluminium from bauxite tailings and synchronously preparing high siliceous residues |
| CN104058434A (en) * | 2014-04-30 | 2014-09-24 | 清华大学 | Method for producing aluminum oxide |
| CN112813284A (en) * | 2020-12-29 | 2021-05-18 | 中国科学院过程工程研究所 | Method for extracting aluminum from aluminum-containing mineral |
-
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- 2022-12-01 CN CN202211531927.9A patent/CN115772608A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920067A (en) * | 2006-09-14 | 2007-02-28 | 北京矿冶研究总院 | Method for extracting aluminum from high-silicon aluminum-containing mineral raw material by acid process |
| CN103421960A (en) * | 2013-08-06 | 2013-12-04 | 昆明理工大学 | Method for efficiently recycling ferro-aluminium from bauxite tailings and synchronously preparing high siliceous residues |
| CN104058434A (en) * | 2014-04-30 | 2014-09-24 | 清华大学 | Method for producing aluminum oxide |
| CN112813284A (en) * | 2020-12-29 | 2021-05-18 | 中国科学院过程工程研究所 | Method for extracting aluminum from aluminum-containing mineral |
Non-Patent Citations (1)
| Title |
|---|
| 刘德信，云龙，何建勇，石磊编: "《农业应用科学技术基础》", 31 August 1986, 成都：成都科技大学出版社, pages: 401 - 402 * |
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