CN102703692A - Method for removing ferrotitanium in low-grade bauxite by curing process with sulfuric acid - Google Patents
Method for removing ferrotitanium in low-grade bauxite by curing process with sulfuric acid Download PDFInfo
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- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 51
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910001200 Ferrotitanium Inorganic materials 0.000 title abstract 3
- 239000012265 solid product Substances 0.000 claims abstract description 18
- 239000001117 sulphuric acid Substances 0.000 claims abstract description 17
- 235000011149 sulphuric acid Nutrition 0.000 claims abstract description 17
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims description 24
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 32
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 12
- 239000010936 titanium Substances 0.000 abstract description 12
- 229910052719 titanium Inorganic materials 0.000 abstract description 12
- 229910000676 Si alloy Inorganic materials 0.000 abstract description 10
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 9
- 239000012535 impurity Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- 238000002386 leaching Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 description 17
- 239000003921 oil Substances 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 238000010792 warming Methods 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 3
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 229910001648 diaspore Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910001679 gibbsite Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 229960001866 silicon dioxide Drugs 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention provides a method for removing ferrotitanium in low-grade bauxite by curing process with sulfuric acid. The method includes fine grinding crushed bauxite, mixing the bauxite which is ground well with concentrated sulfuric acid according to a certain proportion to obtain paste, roasting at certain temperature, leaching clinker obtained by roasting in dilute sulphuric acid, performing solid-liquid separation, washing solid product, drying the solid product till water content is lower than 2% so as to obtain raw material applicable to production of aluminum silicon alloy. The method using the low-grade bauxite and the concentrated sulfuric acid as raw materials is simple in process, and waste acid is convenient to recycle. According to the process route, ferrotitanium removal for bauxite is effective, and cost is low. In addition, other metal impurities can be removed. Products prepared by the method have titanium mass not less than 0.9wt% and ferrum content less than 0.7wt%.
Description
Technical field
The present invention relates to a kind of method of removing ferrotianium of utilizing bauxite in the process that low-grade bauxite produces aluminum silicon alloy, belong to metallurgical technology field.
Technical background
Aluminium in the earth's crust mainly exists with hydrated aluminas such as gibbsite, boehmite and diaspores; Outside the alumina hydrate; Also contain a lot of impurity; Mainly be silica, iron oxide, secondly be titanium dioxide, the carbonate of small amount of calcium magnesium and sodium, potassium, vanadium, gallium, zinc etc.Wherein silicon-dioxide mainly is to exist with silicate mineralss such as kaolinite (
), chlorite, hydromuscovites; Iron mainly is to exist with rhombohedral iron ore (
), contains pyrrhosiderite (
) sometimes; Titanium oxide is many to be existed with anatase octahedrite and rutile, and their degrees of scatter in bauxite have very big difference.China's bauxite is main with diaspore, and reserves account for 98.46%, and gibbsite type is less, only accounts for 1.54%.Diaspore type bauxite has the characteristics of high alumina, high silicon, low iron, uses this ore to produce aluminum oxide and compares it with gipsite and melt that poor performance, complex process, cost high.
Whole world aluminium about 25% all is used for casting alloy, and casting alloy mainly is an aluminium silicon system.Because aluminum silicon alloy has the favorable mechanical performance, hardness is big, proportion is low, and advantages such as good corrosion resistance are widely used in fields such as Aeronautics and Astronautics, automobile cylinder, welding wire, air-conditioning rotor.
The main stream approach of producing aluminum silicon alloy at present is a fine aluminium pure silicon mix-melting method.Produce metals such as electrolytic aluminum, nickel, copper earlier, moltenly then join various aluminium base master alloys, require electrolytic aluminum and various master alloy are proportionally added in the smelting furnace according to alloying constituent more molten clear, pouring cast part.The production process of these pure metal is complicated, and strict to ingredient requirement, for example alumina silica ratio is low excessively in the production process of aluminum oxide, and then energy consumption rises, and cost increases.It is reported that bauxite aluminium-silicon is than dropping to 7.5, employing alumina producing Bayer process cost increase by 14.5% from 11.And the raw material of producing aluminum silicon alloy is many in the production of different Metallurgical Factories, and master alloy needs repeatedly molten joining.So production link is many, the cycle is long, and traffic capacity is big, and scale of investment is big, and energy consumption is high, and cost increases, and environmental pollution is serious.
In recent years, along with the exhaustion of bauxite resource and country to the advocating of energy-conserving and environment-protective, secondary resource utilization, domestic a lot of scholars have proposed the employing diverse ways, different raw materials is produced aluminum silicon alloy.It is raw material with the mineral that contain aluminum oxide and silicon-dioxide that electric heating process is produced aluminum silicon alloy, is reductive agent with the carbon raw material, makes through the direct retailoring of electric furnace, has saved first preparation aluminum oxide and pure metal and has joined molten process.But in the retailoring process, all MOXs all are reduced into metal, and outside demagging was all volatilized, all the other metals all got in the alloy.Iron can be combined into metallic compound with aluminium, silicon, like
; Titanium and aluminium generate
; And increase the viscosity of alloy, for the further processing of alloy brings difficulty.
Summary of the invention
The objective of the invention is to propose the technology that titanium, iron in the low-grade bauxite are removed in a kind of sulfuric acid slaking; This technology can reduce metallic impurity titanium, the iron in the bauxite effectively; Utilize the content of low-grade bauxite thereby reduce as titanium, iron in the raw material production aluminum silicon alloy; The content of control metallic impurity improves aluminium silicon grade in the bauxite on the source, thereby improves the quality of aluminum silicon alloy.
The present invention realizes through following technical proposal: the method for ferrotianium in the low-grade bauxite is removed in a kind of sulfuric acid slaking, following each step of process:
(1) slaking: the bauxite fine grinding is arrived grain diameter less than 0.074mm; Be 1 ︰ 0.5～2 by the mass ratio of the bauxite and the vitriol oil again and mass concentration is that 98% the vitriol oil is mixed into slurry; Then slurry is warming up in retort furnace under 100 ℃～300 ℃ conditions and carries out roasting 30min～180min, obtain grog;
(2) leach: under 30 ℃～90 ℃, be that 2～10 ︰ 1 join step (1) gained grog in the sulphuric acid soln that concentration is 1mol/L～5mol/L, leach 10min～240min by liquid-solid ratio;
(3) filter with dry: the slurry after step (2) gained is leached separates through filtering; Obtain solid product and filtrating, again with solid product through 3～5 times the washing after, dry to moisture less than 2%; Promptly obtaining removing the bauxite of ferrotianium, is to be applicable to the raw material of producing aluminum silicon alloy.
The chemical ingredients of the bauxite in the said step (1) is: Al
2O
320～60wt%, SiO
210～60wt%, Fe
2O
31.14～11.36wt%, TiO
21.68～8.32wt%, surplus are impurity.
Filtrating in the said step (3) recycles as sulphuric acid soln.
Advantage of the present invention and beneficial effect:
(1) to adopt low-grade bauxite, the vitriol oil be raw material in the present invention, and technology is simple, and spent acid is convenient to recycle;
(2) according to operational path of the present invention, bauxite to remove ferrotianium effective, cost is low, can also remove other metallic impurity simultaneously;
(3) can reach the quality≤0.9wt.% of titanium in the product that the present invention prepares, the content≤0.7wt.% of iron.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description.
The main chemical compositions of used bauxite is following:
The chemical ingredients of bauxite A is: Al
2O
346.20wt%, SiO
237.05wt%, Fe
2O
35.31wt%, TiO
22.28wt%, surplus are impurity.
The chemical ingredients of bauxite B is: Al
2O
357.86wt%, SiO
219.60wt%, Fe
2O
31.31wt%, TiO
25.14wt%, surplus are impurity.
Embodiment 1
(1) slaking: bauxite A fine grinding is arrived grain diameter less than 0.074mm; Be 1 ︰ 0.5 by the mass ratio of the bauxite and the vitriol oil again and mass concentration is that 98% the vitriol oil is mixed into slurry; Then slurry is warming up in retort furnace under 100 ℃ of conditions and carries out roasting 30min, obtain grog;
(2) leach: under 30 ℃, be that 2 ︰ 1 join step (1) gained grog in the sulphuric acid soln that concentration is 2mol/L, leach 240min by liquid-solid ratio;
(3) filter with dry: the slurry after step (2) gained is leached separates through filtering; Obtain solid product and filtrating; Filtrating recycles as sulphuric acid soln, again with solid product through 3 times the washing after, dry to moisture less than 2%; Promptly obtain removing the bauxite of ferrotianium, wherein the mass content of titanium is 1.2wt%; The content of iron is 0.78wt%.
Embodiment 2
(1) slaking: is 0.070mm with bauxite A fine grinding to grain diameter; Be 1 ︰ 0.8 by the mass ratio of the bauxite and the vitriol oil again and mass concentration is that 98% the vitriol oil is mixed into slurry; Then slurry is warming up in retort furnace under 300 ℃ of conditions and carries out roasting 90min, obtain grog;
(2) leach: under 90 ℃, be that 5 ︰ 1 join step (1) gained grog in the sulphuric acid soln that concentration is 4mol/L, leach 60min by liquid-solid ratio;
(3) filter with dry: the slurry after step (2) gained is leached separates through filtering; Obtain solid product and filtrating; Filtrating recycles as sulphuric acid soln, again with solid product through 4 times the washing after, dry to moisture be 1%; Promptly obtain removing the bauxite of ferrotianium, wherein the mass content of titanium is 0.93wt%; The content of iron is 0.74wt%.
Embodiment 3
(1) slaking: is 0.062mm with bauxite A fine grinding to grain diameter; Be 1 ︰ 1.2 by the mass ratio of the bauxite and the vitriol oil again and mass concentration is that 98% the vitriol oil is mixed into slurry; Then slurry is warming up in retort furnace under 200 ℃ of conditions and carries out roasting 180min, obtain grog;
(2) leach: under 90 ℃, be that 8 ︰ 1 join step (1) gained grog in the sulphuric acid soln that concentration is 5mol/L, leach 60min by liquid-solid ratio;
(3) filter with dry: the slurry after step (2) gained is leached separates through filtering; Obtain solid product and filtrating; Filtrating recycles as sulphuric acid soln, again with solid product through 4 times the washing after, dry to moisture be 1.5%; Promptly obtain removing the bauxite of ferrotianium, wherein the mass content of titanium is 0.54wt%; The content of iron is 0.48wt%.
Embodiment 4
(1) slaking: is 0.073mm with bauxite B fine grinding to grain diameter; Be 1 ︰ 1 by the mass ratio of the bauxite and the vitriol oil again and mass concentration is that 98% the vitriol oil is mixed into slurry; Then slurry is warming up in retort furnace under 100 ℃ of conditions and carries out roasting 60min, obtain grog;
(2) leach: under 60 ℃, be that 5 ︰ 1 join step (1) gained grog in the sulphuric acid soln that concentration is 3mol/L, leach 90min by liquid-solid ratio;
(3) filter with dry: the slurry after step (2) gained is leached separates through filtering; Obtain solid product and filtrating; Filtrating recycles as sulphuric acid soln, again with solid product through 5 times the washing after, dry to moisture less than 2%; Promptly obtain removing the bauxite of ferrotianium, wherein the mass content of titanium is 1.48wt%; The content of iron is 0.28wt%.
Embodiment 5
(1) slaking: bauxite B fine grinding is arrived grain diameter less than 0.074mm; Be 1 ︰ 2 by the mass ratio of the bauxite and the vitriol oil again and mass concentration is that 98% the vitriol oil is mixed into slurry; Then slurry is warming up in retort furnace under 200 ℃ of conditions and carries out roasting 180min, obtain grog;
(2) leach: under 90 ℃, be that 8 ︰ 1 join step (1) gained grog in the sulphuric acid soln that concentration is 1mol/L, leach 60min by liquid-solid ratio;
(3) filter with dry: the slurry after step (2) gained is leached separates through filtering; Obtain solid product and filtrating; Filtrating recycles as sulphuric acid soln, again with solid product through 3 times the washing after, dry to moisture less than 2%; Promptly obtain removing the bauxite of ferrotianium, wherein the mass content of titanium is 0.39wt%; The content of iron is 0.28wt%.
Embodiment 6
(1) slaking: bauxite B fine grinding is arrived grain diameter less than 0.074mm; Be 1 ︰ 1.6 by the mass ratio of the bauxite and the vitriol oil again and mass concentration is that 98% the vitriol oil is mixed into slurry; Then slurry is warming up in retort furnace under 300 ℃ of conditions and carries out roasting 180min, obtain grog;
(2) leach: under 60 ℃, be that 10 ︰ 1 join step (1) gained grog in the sulphuric acid soln that concentration is 5mol/L, leach 240min by liquid-solid ratio;
(3) filter with dry: the slurry after step (2) gained is leached separates through filtering; Obtain solid product and filtrating, filtrating recycles as sulphuric acid soln, again with solid product after washing for 4 times; Dry to moisture less than 2%; Promptly obtain removing the bauxite of ferrotianium, wherein the mass content of titanium is 0.70wt%, and the content of iron is 0.43wt%.
Claims (2)
1. the method for ferrotianium in the low-grade bauxite is removed in a sulfuric acid slaking, it is characterized in that through following each step:
(1) the bauxite fine grinding is arrived grain diameter less than 0.074mm; Be 1 ︰ 0.5～2 by the mass ratio of the bauxite and the vitriol oil again and mass concentration is that 98% the vitriol oil is mixed into slurry; Then slurry is carried out roasting 30min～180min under 100 ℃～300 ℃ conditions, obtain grog;
(2) under 30 ℃～90 ℃, be that 2～10 ︰ 1 join step (1) gained grog in the sulphuric acid soln that concentration is 1mol/L～5mol/L by liquid-solid ratio, leach 10min～240min;
(3) slurry after step (2) gained is leached separates through filtering, and obtains solid product and filtrating, again with solid product after washing for 3～5 times, dry to moisture less than 2%, promptly obtain removing the bauxite of ferrotianium.
2. the method for ferrotianium in the low-grade bauxite is removed in sulfuric acid slaking according to claim 1, and it is characterized in that: the filtrating in the said step (3) recycles as sulphuric acid soln.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115491508A (en) * | 2022-10-13 | 2022-12-20 | 中南大学 | Leaching method of cobalt slag containing ferrosilicon |
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| 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 |
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| CN115491508B (en) * | 2022-10-13 | 2023-06-20 | 中南大学 | Leaching method of ferrosilicon-cobalt-containing slag |
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