CN101289211A - Method for recovering sodium oxide and aluminum oxide from red mud by bayer process - Google Patents
Method for recovering sodium oxide and aluminum oxide from red mud by bayer process Download PDFInfo
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- CN101289211A CN101289211A CNA2008101148034A CN200810114803A CN101289211A CN 101289211 A CN101289211 A CN 101289211A CN A2008101148034 A CNA2008101148034 A CN A2008101148034A CN 200810114803 A CN200810114803 A CN 200810114803A CN 101289211 A CN101289211 A CN 101289211A
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- red mud
- bayer process
- lime
- dealuminzation
- bayer
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000004131 Bayer process Methods 0.000 title claims abstract description 48
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910001948 sodium oxide Inorganic materials 0.000 title claims abstract description 20
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims description 21
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 39
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 39
- 239000004571 lime Substances 0.000 claims abstract description 39
- 239000003513 alkali Substances 0.000 claims abstract description 36
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- 238000004090 dissolution Methods 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 14
- 239000002893 slag Substances 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- 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 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims description 6
- 238000002386 leaching Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000003518 caustics Substances 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 3
- 229910001570 bauxite Inorganic materials 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000404 calcium aluminium silicate Substances 0.000 description 2
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 2
- 229940078583 calcium aluminosilicate Drugs 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- JTCFNJXQEFODHE-UHFFFAOYSA-N [Ca].[Ti] Chemical compound [Ca].[Ti] JTCFNJXQEFODHE-UHFFFAOYSA-N 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- Treatment Of Sludge (AREA)
Abstract
The invention provides a method for recycling sodium oxide and alumina in red mud by Bayer process and relates to the method for recycling the sodium oxide and the alumina in the red mud by the Bayer process in an alumina producing process. The method is characterized in that the recycling process is that the red mud is dissolved out by circulating alkali solution under the condition of being added with lime by the Bayer process; the red mud is separated and discharged from the slurry dissolved out; one part of the obtained solution is added with the lime for dealuminizing; the dealuminized solution is used for circularly processing the red mud of next group; the other part of dealuminized solution is added in a system of Bayer process for complementing alkali. By the method of the invention, the sodium oxide and the alumina can be recycled from the red mud, which not only reduces the red mud content of waste residue, but also is easy for comprehensive utilization and environment protection owing to low alkali red mud, which provides technical support for the sustainable development of aluminum industry in China.
Description
Technical field
The recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud relates to and reclaims sodium oxide and method of alumina in a kind of aluminum oxide production process in the Bayer process red mud.
Technical background
The main method of producing aluminum oxide is a Bayer process, and one ton of aluminum oxide of every production will produce 1～2 ton of red mud, and Bayer process red mud A/S is generally about 1～2, and N/S is generally about 0.35～0.6, and the composition of Bayer red mud silicon mine is mainly the sodium white residue.Bayer red mud is generally directly stored up, or as the raw material of sintering process.More than two kinds of treatment measures all have problems, directly store up because the alkali content height, big for environment pollution, red mud amount is big, it is big to take up room; Handle then energy consumption height, treatment scheme complexity with sintering process.
Summary of the invention
The objective of the invention is deficiency at above-mentioned prior art existence, propose that a kind of flow process is simple, energy consumption is low, sodium oxide, alumina recovery rate height, red mud total amount after the processing reduces, the red mud alkali content is low, little to environmental influence, be convenient to store up and the Bayer process red mud that fully utilizes in the recovery method of sodium oxide and aluminum oxide.
The objective of the invention is to be achieved through the following technical solutions.
The recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud, it is characterized in that its removal process is that Bayer process red mud is carried out stripping with circulation alkali liquor under adding lime condition, the stripping rear slurry is isolated red mud and is effluxed, a solution part that obtains is added the lime dealuminzation, solution circulated behind the dealuminzation is handled the next batch red mud, and another part joins the Bayer process system and mends alkali.
The recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud of the present invention is characterized in that the dealuminzation slag of its removal process generation adds the Bayer process system or reclaims aluminum oxide as the raw material or the processing of use sodium carbonate solution of preparation aluminous cement as leaching additive.
The recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud of the present invention, when it is characterized in that its removal process Bayer process red mud carries out stripping with circulation alkali liquor under adding the lime condition, the caustic sodium concentration N of its circulation alkali liquor
kBe 50～230g/L, Al
2O
3≤ 15g/L, when Bayer process red mud added circulation alkali liquor and lime, total amount of lime was that calcium silicon is 0.5～2.5 than C/S to the amount of lime of interpolation in the stripping slurry to controlling, red mud amount is 10～350g/L in the slip; The stripping temperature is 120～300 ℃, insulation 5～360min, control red mud dissolution fluid α
k〉=7, the alumina silica ratio A/S that abandons red mud is 0.4～0.8, and sodium-silicon-rate is 0.01～0.15, and the stripping slurries are isolated red mud and effluxed.
The recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud of the present invention, it is characterized in that part red mud dissolution fluid desiliconization process in its removal process, be to be 1.5～2.5 to add the lime dealuminzations by calcium aluminum ratio C/A, the dealuminzation temperature is 40～110 ℃, and the time is 10～180min.
Method of the present invention is suitable for the Bayer process red mud handling different bauxite, obtain under different leaching conditions.Both can handle the diaspore type bauxite Bayer process red mud that stripping obtains under comparatively high temps, also can handle the Bayer process red mud of gibbsitic bauxite in lesser temps stripping below 200 ℃, accessible Bayer red mud A/S is 1.0～2.5, and sodium-silicon-rate N/S is 0.15～0.65.To the Bayer process red mud of 220～280 ℃ of comparatively high temps strippings, the red mud treatment temp is 200～300 ℃, time 5～150min; Bayer process red mud to 100～200 ℃ of lesser temps strippings can be handled under lower temperature conditions, and treatment temp is 120～200 ℃, time 30～60min.
Method of the present invention is a wet processing red mud process, and technical process is simple, and is easy with existing alumina producer grafting, and the Bayer red mud dissolution fluid of generation is except satisfying dealuminzation reprocessing cycle alkali lye needs, and remaining can be directly used in the Bayer process system and mend alkali.By to the Bayer red mud wet processing, promptly under high α k solution condition, thereby make silicon mine sodium white residue in the red mud change the content that iron, titanium calcium aluminosilicate hydrate greatly reduce aluminum oxide and sodium oxide in the red mud into.In the red mud dissolution fluid, add lime, remove most aluminium in the solution, make that the circulation alkali liquor of exsolution red mud is regenerated.It is low to efflux the red mud total amount, Na in the red mud
2O content is lower, and is little to environmental influence, is beneficial to and stores up, and helps the comprehensive utilization of red mud.To above problem, propose sodium oxide and method of alumina in a kind of hydrometallurgic recovery red mud, make the sodium white residue in the red mud change the calcium aluminosilicate hydrate of iron, titanium replacement aluminium into, thereby red mud A/S is dropped to below 0.7, N/S drops to below 0.15, can reduce the waste residue red mud amount.This method is easy to realize industrialization, and the red mud alkali content that obtains is low, is easy to environmental protection, also is beneficial to comprehensive utilization.
Concrete embodiment
The recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud, its removal process is that Bayer process red mud is carried out stripping with circulation alkali liquor under adding lime condition, the stripping rear slurry is isolated red mud and is effluxed, a solution part that obtains is added the lime dealuminzation, solution circulated behind the dealuminzation is handled the next batch red mud, and another part joins the Bayer process system and mends alkali.The dealuminzation slag that its removal process produces adds the raw material of Bayer process system or conduct preparation aluminous cement as leaching additive or uses sodium carbonate solution to handle and reclaim aluminum oxide.
1) at caustic sodium concentration N
kBe 50～230g/L, Al
2O
3(alumina silica ratio A/S is 1.0～2.0 to add lime and Bayer process red mud in the circulation alkali liquor of≤15g/L, sodium-silicon-rate N/S is 0.15～0.65) the preparation red mud slurry, total amount of lime is that calcium silicon is 0.5～2.5 than C/S (mass ratio of calcium oxide and silicon oxide) to the amount of lime of adding in the slip to controlling, and the red mud add-on is 10～350g/L circulation alkali liquor; 2) 120～300 ℃ of temperature, insulation 5～360min, control red mud dissolution fluid α
k〉=7, the alumina silica ratio A/S that abandons red mud is 0.4～0.8, and sodium-silicon-rate is 0.01～0.15, and the stripping slurries are isolated red mud and effluxed; 3) be 1.5～2.5 to add the lime dealuminzations by calcium aluminum ratio C/A in part red mud dissolution fluid, the dealuminzation temperature is 40～110 ℃, and the time is 10～180min, and the solution circulated behind the dealuminzation is handled the next batch red mud, and unnecessary part joins the Bayer process system and mends alkali; The alternative lime of dealuminzation slag that produces adds the Bayer process system as leaching additive, also can be used as the raw material of preparation aluminous cement or uses the sodium carbonate solution processing to reclaim aluminum oxide.
Embodiment 1
To A/S is 1.3 Bayer process exsolution red mud, 260 ℃ of temperature, and circulation alkali liquor caustic sodium concentration N
KBe 110g/L, alumina concentration is 2.1g/L, and total lime adding amount calcium silicon ratio is 1.3, dissolution time 90min, and obtaining abandoning red mud alumina silica ratio A/S is 0.62, sodium-silicon-rate N/S is 0.08, can efflux and store up, and also can fully utilize; A dissolution fluid part is used for dealuminzation, and alkali is mended by unnecessary added bayer's process system, and during dealuminzation, lime is 1.7 addings by calcium aluminum ratio C/A, and the dealuminzation temperature is 90 ℃, and the time is 30min, and dealuminzation efficient is 85%, and dealuminzation solution is used for circular treatment next batch red mud; Dealuminzation slag part replacing lime joins the bayer's process digestion series, and unnecessary dealuminzation slag is produced aluminous cement.
Embodiment 2
The A/S that gibbsitic bauxite is obtained under 145 ℃ of strippings is 1.5 Bayer process red muds, 120 ℃ of temperature, and circulation alkali liquor concentration N
KBe 130g/L, alumina concentration is 3.4g/L, and total lime adding amount calcium silicon ratio is 1.5, dissolution time 240min, and abandoning red mud alumina silica ratio A/S is 0.5, sodium-silicon-rate N/S is 0.11, can efflux and store up, and also can fully utilize; A dissolution fluid part is used for dealuminzation, and alkali is mended by unnecessary added bayer's process system, and during dealuminzation, lime is 1.9 addings by calcium aluminum ratio C/A, and the dealuminzation temperature is 50 ℃, and the time is 60min, and dealuminzation efficient is 89%, and dealuminzation solution is used for circular treatment next batch red mud; The dealuminzation slag can be used for producing aluminous cement.
Embodiment 3
The A/S that gibbsitic bauxite is obtained under 145 ℃ of strippings is 1.7 Bayer process exsolution red muds, 150 ℃ of temperature, and circulation alkali liquor concentration N
KBe 160g/L, alumina concentration is 4.5g/L, and total lime adding amount calcium silicon ratio is 1.7, and it is 0.7 that dissolution time 180min abandons red mud alumina silica ratio A/S, and sodium-silicon-rate N/S is 0.12, can efflux and store up, and also can fully utilize; A dissolution fluid part is used for dealuminzation, and alkali is mended by unnecessary added bayer's process system, and during dealuminzation, lime is 1.8 addings by calcium aluminum ratio C/A, and the dealuminzation temperature is 70 ℃, and the time is 60min, and dealuminzation efficient is 90%, and dealuminzation solution is used for circular treatment next batch red mud; The dealuminzation slag can be used for producing aluminous cement.
Embodiment 4
Gibbsitic bauxite is obtained A/S under 145 ℃ of strippings be 1.9 Bayer process exsolution red mud, 170 ℃ of temperature, and circulation alkali liquor concentration N
KBe 140g/L, alumina concentration is that the total lime adding amount calcium of 5g/L silicon ratio is 1.9, dissolution time 120min, and abandoning red mud alumina silica ratio A/S is 0.71, sodium-silicon-rate N/S is 0.17, can efflux and store up, and also can fully utilize; A dissolution fluid part is used for dealuminzation, and alkali is mended by unnecessary added bayer's process system, and during dealuminzation, lime is 2.0 addings by calcium aluminum ratio C/A, and the dealuminzation temperature is 90 ℃, and the time is 60min, and dealuminzation efficient is 84%, and dealuminzation solution is used for circular treatment next batch red mud; The dealuminzation slag can be used for producing aluminous cement.
Embodiment 5
Gibbsitic bauxite is obtained A/S under 145 ℃ of strippings be 2.2 Bayer process exsolution red mud, 200 ℃ of temperature, and circulation alkali liquor concentration N
KBe 140g/L, alumina concentration is that the total lime adding amount calcium of 3g/L silicon ratio is 2.1, dissolution time 120min, and abandoning red mud alumina silica ratio A/S is 0.71, sodium-silicon-rate N/S is 0.17, can efflux and store up, and also can fully utilize; A dissolution fluid part is used for dealuminzation, and alkali is mended by unnecessary added bayer's process system, and during dealuminzation, lime is 1.6 addings by calcium aluminum ratio C/A, and the dealuminzation temperature is 90 ℃, and the time is 60min, and dealuminzation efficient is 80%, and dealuminzation solution is used for circular treatment next batch red mud; Dealuminzation slag part replacing lime joins the bayer's process digestion series, and unnecessary dealuminzation slag is produced aluminous cement.
Embodiment 6
Gibbsitic bauxite is obtained A/S under 145 ℃ of strippings be 2.4 Bayer process exsolution red mud, 260 ℃ of temperature, and circulation alkali liquor concentration N
KBe 140g/L, alumina concentration is that the total lime adding amount calcium of 3g/L silicon ratio is 1.1, dissolution time 60min, and abandoning red mud alumina silica ratio A/S is 0.59, sodium-silicon-rate N/S is 0.04, can efflux and store up, and also can fully utilize; A dissolution fluid part is used for dealuminzation, and alkali is mended by unnecessary added bayer's process system, and during dealuminzation, lime is 2.3 addings by calcium aluminum ratio C/A, and the dealuminzation temperature is 90 ℃, and the time is 60min, and dealuminzation efficient is 81%, and dealuminzation solution is used for circular treatment next batch red mud; Dealuminzation slag part replacing lime joins the bayer's process digestion series, and unnecessary dealuminzation slag is produced aluminous cement.
Claims (4)
1. the recovery method of sodium oxide and aluminum oxide in the Bayer process red mud, it is characterized in that its removal process is that Bayer process red mud is carried out stripping with circulation alkali liquor under adding lime condition, the stripping rear slurry is isolated red mud and is effluxed, a solution part that obtains is added the lime dealuminzation, solution circulated behind the dealuminzation is handled the next batch red mud, and another part joins the Bayer process system and mends alkali.
2. the recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud according to claim 1 is characterized in that the dealuminzation slag of its removal process generation adds the Bayer process system or reclaims aluminum oxide as the raw material or the processing of use sodium carbonate solution of preparation aluminous cement as leaching additive.
3. the recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud according to claim 1, when it is characterized in that its removal process Bayer process red mud carries out stripping with circulation alkali liquor under adding the lime condition, the caustic sodium concentration N of its circulation alkali liquor
kBe 50～230g/L, Al
2O
3≤ 15g/L, when Bayer process red mud added circulation alkali liquor and lime, total amount of lime was that calcium silicon is 0.5～2.5 than C/S to the amount of lime of interpolation in the stripping slurry to controlling, red mud amount is 10～350g/L in the slip; The stripping temperature is 120～300 ℃, insulation 5～360min, control red mud dissolution fluid α
k〉=7, the alumina silica ratio A/S that abandons red mud is 0.4～0.8, and sodium-silicon-rate is 0.01～0.15, and the stripping slurries are isolated red mud and effluxed.
4. the recovery method of sodium oxide and aluminum oxide in a kind of Bayer process red mud according to claim 1, it is characterized in that part red mud dissolution fluid dealumination process in its removal process, be to be 1.5～2.5 to add the lime dealuminzations by calcium aluminum ratio C/A, the dealuminzation temperature is 40～110 ℃, and the time is 10～180min.
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| CNA2008101148034A CN101289211A (en) | 2008-06-12 | 2008-06-12 | Method for recovering sodium oxide and aluminum oxide from red mud by bayer process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101148034A CN101289211A (en) | 2008-06-12 | 2008-06-12 | Method for recovering sodium oxide and aluminum oxide from red mud by bayer process |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092910A (en) * | 2010-12-15 | 2011-06-15 | 中国铝业股份有限公司 | Treatment method of red mud by Bayer process |
| CN102303941A (en) * | 2011-09-14 | 2012-01-04 | 中国科学院过程工程研究所 | Deep dealkalizing method of red mud in alumina factory |
| CN104445310A (en) * | 2013-09-25 | 2015-03-25 | 贵阳铝镁设计研究院有限公司 | Novel process for treating middle-low bauxite in complete wet method alkali system |
| CN106086411A (en) * | 2016-08-01 | 2016-11-09 | 江苏省冶金设计院有限公司 | Red mud is utilized to prepare the method and system of ferrosilicon |
| CN108083294A (en) * | 2018-02-12 | 2018-05-29 | 沈阳鑫博工业技术股份有限公司 | A kind of device and method that aluminium oxide and sodium oxide molybdena are extracted from red mud |
| WO2018233689A1 (en) * | 2017-06-23 | 2018-12-27 | 东北大学 | Method for preparing metallurgical-level aluminum oxide by treating bayer process-based red mud by using one-step alkali heat process of andradite |
| WO2019019844A1 (en) * | 2017-07-26 | 2019-01-31 | 东北大学 | Process for producing 4a zeolite by treating bayer process red mud with andradite one-step alkali heat method |
| CN110127725A (en) * | 2019-06-18 | 2019-08-16 | 河南镁联铝基材料有限公司 | The dealkalization method of Bayer process red mud |
| CN112158869A (en) * | 2020-10-16 | 2021-01-01 | 中南大学 | Method for dissolving out diasporic bauxite |
| CN112919511A (en) * | 2019-12-05 | 2021-06-08 | 沈阳铝镁设计研究院有限公司 | Ultra simple bayer process |
| CN112974476A (en) * | 2021-02-06 | 2021-06-18 | 达州励志环保科技有限公司 | Method for treating aluminum ash by using caustic soda |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092910A (en) * | 2010-12-15 | 2011-06-15 | 中国铝业股份有限公司 | Treatment method of red mud by Bayer process |
| CN102303941A (en) * | 2011-09-14 | 2012-01-04 | 中国科学院过程工程研究所 | Deep dealkalizing method of red mud in alumina factory |
| CN102303941B (en) * | 2011-09-14 | 2013-08-21 | 中国科学院过程工程研究所 | Deep dealkalizing method of red mud in alumina factory |
| CN104445310A (en) * | 2013-09-25 | 2015-03-25 | 贵阳铝镁设计研究院有限公司 | Novel process for treating middle-low bauxite in complete wet method alkali system |
| CN106086411A (en) * | 2016-08-01 | 2016-11-09 | 江苏省冶金设计院有限公司 | Red mud is utilized to prepare the method and system of ferrosilicon |
| WO2018233689A1 (en) * | 2017-06-23 | 2018-12-27 | 东北大学 | Method for preparing metallurgical-level aluminum oxide by treating bayer process-based red mud by using one-step alkali heat process of andradite |
| WO2019019844A1 (en) * | 2017-07-26 | 2019-01-31 | 东北大学 | Process for producing 4a zeolite by treating bayer process red mud with andradite one-step alkali heat method |
| CN108083294A (en) * | 2018-02-12 | 2018-05-29 | 沈阳鑫博工业技术股份有限公司 | A kind of device and method that aluminium oxide and sodium oxide molybdena are extracted from red mud |
| CN110127725A (en) * | 2019-06-18 | 2019-08-16 | 河南镁联铝基材料有限公司 | The dealkalization method of Bayer process red mud |
| CN110127725B (en) * | 2019-06-18 | 2021-07-30 | 河南镁联铝基材料有限公司 | Dealkalization method of Bayer process red mud |
| CN112919511A (en) * | 2019-12-05 | 2021-06-08 | 沈阳铝镁设计研究院有限公司 | Ultra simple bayer process |
| CN112158869A (en) * | 2020-10-16 | 2021-01-01 | 中南大学 | Method for dissolving out diasporic bauxite |
| CN112158869B (en) * | 2020-10-16 | 2021-06-29 | 中南大学 | Method for dissolving out diasporic bauxite |
| CN112974476A (en) * | 2021-02-06 | 2021-06-18 | 达州励志环保科技有限公司 | Method for treating aluminum ash by using caustic soda |
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