CN1145879A - Technological process of pre-desiliconization for bauxite slurry - Google Patents
Technological process of pre-desiliconization for bauxite slurry Download PDFInfo
- Publication number
- CN1145879A CN1145879A CN 96106721 CN96106721A CN1145879A CN 1145879 A CN1145879 A CN 1145879A CN 96106721 CN96106721 CN 96106721 CN 96106721 A CN96106721 A CN 96106721A CN 1145879 A CN1145879 A CN 1145879A
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- CN
- China
- Prior art keywords
- desiliconization
- ore pulp
- slurry
- bauxite
- mother liquor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000002002 slurry Substances 0.000 title claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000012452 mother liquor Substances 0.000 claims description 23
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000003518 caustics Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 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 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 239000013055 pulp slurry Substances 0.000 claims 1
- 206010039509 Scab Diseases 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000007613 slurry method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229940115440 aluminum sodium silicate Drugs 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
- 230000007812 deficiency Effects 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 238000009776 industrial production 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
- 238000002386 leaching Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The pre-desiliconization process features that mother liquid for bauxite slurry prepn is divided into two parts, one part together with ore is ground into slurry with high solid content and the other part is heated and mixed with the slurry to predesliconize. The present invention can ensure the temp of stripping reaction and solve the problems of scabbing, heat efficiency, etc.
Description
A kind of technological process of pre-desiliconization for bauxite slurry relates to and is a kind ofly handling bauxite, and the pre-desilication process of a kind of ore pulp during diaspore bauxite particularly is used for the ore pulp pre-desilicification process before the stripping of alumina producing Bayer process bauxite.
Contain many kinds of silicon mines such as kaolinite, illite in the bauxite, these silicon mines are decomposed by mother liquor (alkaline solution) in the process in leaching of bauxite, form with water glass enters solution, close sodium aluminium silicate (being called sodium white residue or white residue in the production) with the sodium aluminate solution water generation reaction then, major part enters red mud, and small amount of residual is slowly separated out in dissolution fluid successively.Silicon oxide becomes the solid precipitation process and is called desiliconization process in the solution.The white residue that desiliconization process generates is on pipeline on the production unit, and especially separating out on heat exchanger surface becomes white residue, and heat transfer coefficient is obviously reduced, and increases energy consumption and cleaning work amount.Scab in order to prevent and to alleviate white residue in the industrial production, usually ore pulp is stirred certain hour at a certain temperature, make silicon mine change white residue as much as possible into, this process is called pre-desilicification process.
Traditional pre-desilication process of ore pulp has two kinds both at home and abroad at present: (1) does not heat pre-desilication process, and the ore pulp that is about to prepare stays for some time in having the storage tank of whipping appts and carries out pre-desiliconization.This method technical process is simple, but owing to pre-desiliconization temperature low (80 ℃), weak effect.(2) the pre-desilication process of indirect heating, the ore pulp that is about to prepare, stay for some time and carry out pre-desiliconization the ore pulp indirect heating in the groove with steam in having the storage tank of whipping appts.This method is because desiliconization temperature height can improve the efficient of pre-desiliconization, but the indirect heating pipeline in the groove easily scabs, and need often cleaning, and the cleaning difficulty, the workload that scab is big.
Purpose of the present invention is exactly in order to overcome in the present pre-desiliconization for bauxite slurry method, and the deficiency of existence provides a kind of and do not scab in the Pre-desilicification for Bauxite process, the pre-higher again a kind of pre-desiliconization for bauxite slurry method of desiliconization efficient.
The objective of the invention is to be achieved through the following technical solutions.
A kind of technological process of pre-desiliconization for bauxite slurry, comprise the pre-desiliconization of slurry preparation and ore pulp, it is characterized in that: required mother liquor is divided into two ones during slurry preparation, part mother liquor grinds into the higher ore pulp of solids content together with ore, another part heats, then the slurry in the higher ore deposit of solids content and the mother liquor of heating are converged stirring, stay for some time and carry out pre-desiliconization, processing condition are:
Mother liquor caustic sodium concentration (NK): 130～280g/l,
Mother liquor caustic ratio (α K): 2.7～3.7
The higher ore pulp liquid-solid ratio of solids content (L/S): 2～5
The slurry fineness that solids content is higher :+65#＜5%
Pre-desiliconization temperature: 90～180 ℃
Pre-desiliconization time: 0.2～20 hour
When grinding the higher ore pulp of solids content, can add lime, add-on is: account for 5～10% of bauxite.
Adopt a kind of technological process of pre-desiliconization for bauxite slurry of the present invention, improved the desiliconization temperature on the one hand, on the one hand pre-desilicification process is not produced and scab.Solved in original technology to produce and scabbed, influenced that reaction efficiency and processing scab and the problem that produces aspects.
Description of drawings
Fig. 1 is the schema of a kind of technological process of pre-desiliconization for bauxite slurry of the present invention.
Below in conjunction with embodiment a kind of pre-desiliconization for bauxite slurry method of the present invention is described further.
A kind of technological process of pre-desiliconization for bauxite slurry, at first bauxite, lime, partial mother liquid are carried out ore grinding in ball mill and make ore pulp I, L/S is 2～5, fineness is+65#＜5%, adding amount of lime is 5～10% (lime also can add in other process or not add) of bauxite, simultaneously another part mother liquor is heated to certain temperature, and mix with ore pulp I, make mixed temperature, be that pre-desiliconization temperature reaches 90～180 ℃, and in pre-desilication device, stop and carried out pre-desiliconization in 0.2～20 hour.Ore pulp remains stirring in the pre-desilication device, and stirring velocity will make ore pulp not precipitate, and makes ore pulp II.Ore pulp II can enter dissolving device and carry out the bauxite stripping, also can add to enter dissolving device after the mother liquor allotment and carry out the bauxite stripping again.
Embodiment 1
With Henan bauxite A, lime (add-on be bauxite 7%) and NK are 239g/l, aK is that to grind into L/S in ball mill be 3 for 3.4 partial mother liquid, fineness consists of :+60#2.6%100#7.6%, + 160#15.7%, + 300#32.2%, the ore pulp I of-300#67.8%, ore pulp I temperature is 75 ℃, another part mother liquor being heated to 157 ℃ and ore pulp I meets in the pre-desilication device again, converging back ore pulp L/S is 4.5, the pre-desiliconization temperature in ore deposit this moment reaches 95 ℃, low whipping speed is to stop 10 hours in 30 rev/mins the pre-desilication device, the desiliconization rate reaches 25.3%, and mother liquor well heater and pre-desilication device all do not have and scab.
Embodiment 2
With Henan bauxite A, lime (add-on be bauxite 7%) and NK are 165g/l, ak is that to grind into L/S in ball mill be 2 for 3.4 mother liquor, fineness consists of :+60#2.6%, + 100#7.6%, + 160#15.7%, + 300#32.2%, the ore pulp I of-300#67.8%, if ore pulp I temperature is 90 ℃, another part mother liquor being heated to 265 ℃ and ore pulp I meets in the pre-desilication device again, make that to converge back ore pulp L/S be 6.5, the pre-desiliconization temperature in ore deposit this moment reaches 160 ℃, low whipping speed is that 30 rev/mins pre-desilication device stopped 30 minutes, the desiliconization rate reaches 45.6%, and mother liquor well heater and pre-desilication device all do not have and scab.
Embodiment 3
With Henan bauxite A and NK is 274g/l, ak is that to grind into L/S in ball mill be 3.5 for 3.3 mother liquor, fineness consists of :+100#0.2%, + 160#3.0%, + 320#16.8%, the ore pulp I of-300#83.2%, if ore pulp I temperature is 72 ℃, be 135g/l with NK in addition, ak is that 3.35 mother liquor is heated to 165 ℃, and and ore pulp I meet in the pre-desilication device, make that to converge back ore pulp L/S be 5.3, the pre-desiliconization temperature in ore deposit this moment reaches 95 ℃, low whipping speed is that 30 rev/mins pre-desilication device stopped 12 hours, and the desiliconization rate reaches 24.47%, and mother liquor well heater and pre-desilication device all do not have and scab.
Embodiment 4
With Shanxi bauxite B, lime (add-on be bauxite 10%) and NK are 265g/l, ak is that to grind into L/S in ball mill be 3.2 for 2.9 partial mother liquid, fineness consists of :-100 μ＞98%, the ore pulp I of-315 μ＞100%, ore pulp I temperature is 80 ℃, again another part mother liquor is heated to 167 ℃, and meet in the pre-desilication device with ore pulp I, make that to converge back ore pulp L/S be 5.0, the pre-desiliconization temperature in ore deposit this moment reaches 100 ℃, low whipping speed is that 35 rev/mins pre-desilication device stopped 8 hours, and the desiliconization rate reaches 86.4%, and mother liquor well heater and pre-desilication device all do not have and scab.
Claims (2)
1. technological process of pre-desiliconization for bauxite slurry, comprise the pre-desiliconization of slurry preparation and ore pulp, it is characterized in that: required mother liquor separated into two parts during slurry preparation, part mother liquor grinds into the higher ore pulp of solids content together with ore, another part heats, then that solids content is higher ore pulp mixes stirring with the mother liquor of heating, stays for some time and carries out pre-desiliconization, and processing condition are:
Mother liquor caustic sodium concentration (NK): 130～280g/l,
Mother liquor caustic ratio (α k): 2.7～3.7
The higher pulp slurry solid-to-liquid ratio of solids content (L/S): 2～5
The slurry fineness that solids content is higher :+65#＜5%
Pre-desiliconization temperature: 90～180 ℃
Pre-desiliconization time: 0.2～20 hour.
2. according to the described a kind of technological process of pre-desiliconization for bauxite slurry of claim 1, it is characterized in that: when grinding the higher ore pulp of solids content, can add lime, add-on is to account for 5～10% of bauxite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96106721A CN1049874C (en) | 1996-06-28 | 1996-06-28 | Technological process of pre-desiliconization for bauxite slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96106721A CN1049874C (en) | 1996-06-28 | 1996-06-28 | Technological process of pre-desiliconization for bauxite slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1145879A true CN1145879A (en) | 1997-03-26 |
| CN1049874C CN1049874C (en) | 2000-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96106721A Expired - Fee Related CN1049874C (en) | 1996-06-28 | 1996-06-28 | Technological process of pre-desiliconization for bauxite slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049874C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319861C (en) * | 2002-10-25 | 2007-06-06 | 皮奇尼铝公司 | Method for attacking bauxite enhancing filterability of sludge in attack output |
| CN102234121A (en) * | 2010-04-23 | 2011-11-09 | 贵阳铝镁设计研究院有限公司 | Method and device for pre-desilication with high solid content |
| CN102553864A (en) * | 2010-12-29 | 2012-07-11 | 中国铝业股份有限公司 | Method for cleaning scab of high pressure dissolution system through water dissolution method |
| CN109825724A (en) * | 2019-03-13 | 2019-05-31 | 厦门钨业股份有限公司 | A kind of method that Tungsten smelting removes silicon |
| CN113856507A (en) * | 2021-10-18 | 2021-12-31 | 中铝矿业有限公司 | Imported bauxite pulp preparation device and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2581053B1 (en) * | 1985-04-30 | 1987-05-29 | Pechiney Aluminium | ALUMINA PRODUCTION FROM REACTIVE SILICA LOW GIBBSITE BAUXITY |
| SU1491812A1 (en) * | 1987-10-08 | 1989-07-07 | Предприятие П/Я В-8407 | Method of processing bauxite into silica |
-
1996
- 1996-06-28 CN CN96106721A patent/CN1049874C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319861C (en) * | 2002-10-25 | 2007-06-06 | 皮奇尼铝公司 | Method for attacking bauxite enhancing filterability of sludge in attack output |
| CN102234121A (en) * | 2010-04-23 | 2011-11-09 | 贵阳铝镁设计研究院有限公司 | Method and device for pre-desilication with high solid content |
| CN102553864A (en) * | 2010-12-29 | 2012-07-11 | 中国铝业股份有限公司 | Method for cleaning scab of high pressure dissolution system through water dissolution method |
| CN109825724A (en) * | 2019-03-13 | 2019-05-31 | 厦门钨业股份有限公司 | A kind of method that Tungsten smelting removes silicon |
| CN113856507A (en) * | 2021-10-18 | 2021-12-31 | 中铝矿业有限公司 | Imported bauxite pulp preparation device and method |
| CN113856507B (en) * | 2021-10-18 | 2024-04-02 | 中铝矿业有限公司 | Imported bauxite pulp preparation device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1049874C (en) | 2000-03-01 |
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Owner name: CHINESE ALUMINIUM CO., LTD. Free format text: FORMER OWNER: CHINA CHANGCHENG ALUMINIUM INDUSTRY CO. Effective date: 20030103 |
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Effective date of registration: 20030103 Address after: 100814 No. 12 Fuxing Road, Beijing, Haidian District Patentee after: Aluminum Corporation of China Limited Address before: 450041, Zhengzhou City, Henan province streets Patentee before: China Great Wall Aluminum Corporation |
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