CN101805085A - Method for treating desliming wastewater of reverse flotation of bauxite - Google Patents
Method for treating desliming wastewater of reverse flotation of bauxite Download PDFInfo
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- CN101805085A CN101805085A CN 201010147297 CN201010147297A CN101805085A CN 101805085 A CN101805085 A CN 101805085A CN 201010147297 CN201010147297 CN 201010147297 CN 201010147297 A CN201010147297 A CN 201010147297A CN 101805085 A CN101805085 A CN 101805085A
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Abstract
A method for treating desliming wastewater of bauxite reverse flotation relates to a method for recycling the desliming wastewater of bauxite reverse flotation. The method is characterized in that the bauxite reverse flotation desliming wastewater is sequentially added with fly ash and inorganic acid under stirring to adjust the pH value to be less than 9, and then polyaluminium sulfate and/or cationic polyacrylamide are added for flocculation and sedimentation, and clear water after the separation and sedimentation is recycled. The method of the invention selects proper process conditions for the wastewater generated by the desilting of bauxite, adds fly ash, then adjusts the pH value, and then adds polyaluminium sulfate and cationic polyacrylamide (molecular weight is more than 100 ten thousand) to ensure that the suspended solid in the wastewater is rapidly settled, and clear water returns to the desilting or flotation operation after solid-liquid separation. A large amount of dispersant and alkali are remained in the clear water, so that the water consumption and alkali consumption are greatly reduced.
Description
Technical field
A kind of treatment process of deslimed wastewater for reverse flotation of bauxite relates to a kind of method that deslimed wastewater for reverse flotation of bauxite is recycled that is used for.
Background technology
Gangue mineral mainly is a kaolinite in the bauxite, illite, agalmatolite, clay minerals such as chlorite, they all belong to layered silicate, hardness is little, argillization very easily in the comminution process, and the non-selectivity covering can appear in sludge in floatation process, greatly worsen assorting room, even make assorting room to carry out, especially for the reverse flotation system, because its collecting agent is cationic, more responsive to sludge, so desliming becomes unavoidable link in the reverse floatation process, be applicable to that comparatively successfully the desliming technology of inverse floatation of bauxite has at present: 1, control dispersion-selectivity Desliming method (application number 200410046982.4); 2, selective flocculation desliming (ZL 200610137993.2).But all exist water loss excessive, waste water is difficult to circulation, and a large amount of medicaments comprise that alkali, dispersion agent etc. work the mischief to environment in the waste water, runs counter to " recycling economy " and national related industries policy that worldwide is carried out.Become the unavoidable link of bauxite desilication technology so how to make good use of deslimed wastewater.
Ore dressing recycling water utilization technology mainly contains following several: 1, product natural subsidence, and backwater returns the dressing-works and is used; 2, add all flocculation agents separately, based on various polyacrylamide derivatives, in each product of ore dressing after the rapid sedimentation of suspended solid, the clear water Returning utilization.
More than two kinds of treatment processs have following drawback: 1, natural subsidence, solid-liquid separation efficiency is on the low side; 2, add organic floculant separately after, very big to various separation operation negative effects, especially desliming and flotation operation.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provides a kind of and can significantly reduce desliming medicine consumption, and improve to imitate and utilize backwater, and to the treatment process of the very little deslimed wastewater for reverse flotation of bauxite of corresponding desliming, flotation operation negative impact.
The objective of the invention is to be achieved through the following technical solutions.
A kind of treatment process of deslimed wastewater for reverse flotation of bauxite, it is characterized in that its treating processes with deslimed wastewater for reverse flotation of bauxite under agitation add flyash successively, add mineral acid adjust the pH value less than 9, again add polyaluminium sulfate and/or cationic-type polyacrylamide after, carry out flocculating settling, the clear water of separate and subside utilizes again.
The treatment process of a kind of deslimed wastewater for reverse flotation of bauxite of the present invention is characterized in that described flyash add-on is 0.5～9Kg/m
3
The treatment process of a kind of deslimed wastewater for reverse flotation of bauxite of the present invention, what it is characterized in that described adding adjusts that slurry pH adds less than 9 step is sulfuric acid, nitric acid or hydrochloric acid.
The treatment process of a kind of deslimed wastewater for reverse flotation of bauxite of the present invention is characterized in that described polyaluminium sulfate add-on is 5～20g/m
3
The treatment process of a kind of deslimed wastewater for reverse flotation of bauxite of the present invention is characterized in that described cationic-type polyacrylamide add-on is 0.5～2.0g/m
3
The treatment process of a kind of deslimed wastewater for reverse flotation of bauxite of the present invention, the molecular weight that it is characterized in that described cationic-type polyacrylamide is more than 1,000,000.
The treatment process of a kind of deslimed wastewater for reverse flotation of bauxite of the present invention, it is to be used for bauxite desliming or flotation operation process that the clear water that it is characterized in that described separate and subside utilizes again.
Method of the present invention, waste water at bauxite desliming generation, select suitable process conditions, add flyash, adjust the pH value then, add polyaluminium sulfate, cationic-type polyacrylamide (molecular weight is more than 1,000,000) again, make the rapid sedimentation of suspended solid in the waste water, clear water returns desliming or flotation operation after the solid-liquid separation.Also keep a large amount of dispersion agents, alkali in the clear water, thereby significantly reduced water consumption and alkaline consumption.
Embodiment
A kind of treatment process of deslimed wastewater for reverse flotation of bauxite, inverse floatation of bauxite process can adopt according to publication ZL200610137993.2 carries out desliming to bauxite, successively adds flyash 0.5～9Kg/m in the waste water that desliming obtains
3, adjust evenly; Add sulfuric acid, nitric acid or hydrochloric acid, adjust slurry pH less than 9; Add polyaluminium sulfate 5～20g/m
3, adjust evenly; Add cationic-type polyacrylamide (molecular weight is more than 1,000,000) 0.5～2.0g/m
3, adjust evenly; Solid-liquid separation, clear water are returned desliming or flotation operation, and be very little to the separating effect influence.
Embodiment 1
Test and Selection bauxite raw ore.Desliming method carries out desliming according to patent ZL 200610137993.2 statement methods, and grinding fineness accounts for 80% for-0.074mm, and wherein desliming is for the first time adjusted pH value, consumption 6Kg/t raw ore, dispersion agent 200g/t raw ore, flocculation agent 30g/t raw ore with yellow soda ash; Desliming is for the second time still adjusted pH value, consumption 4Kg/t raw ore, dispersion agent 100g/t raw ore, flocculation agent 10g/t raw ore with yellow soda ash; The waste water that twice desliming obtains merges, and adds flyash 9Kg/m
3, stir after 3 minutes, adjust pH value to 9.0 with sulfuric acid, add polyaluminium sulfate 10g/m
3, add cationic-type polyacrylamide (molecular weight 1,200 ten thousand) 2.0g/m after stirring again
3, stirring, medicament leaves standstill after fully acting on, solid-liquid separation then, solid suspension content is 0.8g/m in the clear water
3, clear water returns the desliming operation; Backwater desliming test remains grinding fineness and accounts for 80% for-0.074mm, and dispersion agent is saved in desliming for the first time, replenishes and adds yellow soda ash 1.4Kg/m
3, the flocculation agent consumption is the 70g/t raw ore; Still save for the second time dispersion agent, replenish and add yellow soda ash 1.0Kg/m
3, the flocculation agent consumption is the 20g/t raw ore.Clear water and backwater test-results see Table 1.
This shows that by using backwater, yellow soda ash and dispersant dosage all significantly reduce in the desliming with medicament, just flocculation agent slightly increases.Backwater all obtains utilizing.And separation index changes hardly.
Table 1: raw ore 1 recycling water utilization test-results
Remarks: A/S is an alumina silica ratio, that is Al in the product
2O
3With SiO
2Weight percent, no unit, down with
Embodiment 2
Test and Selection bauxite raw ore.Desliming method carries out desliming according to patent ZL 200610137993.2 statement methods, and grinding fineness accounts for 60% for-0.074mm, and wherein desliming is for the first time adjusted pH value, consumption 8.0Kg/t raw ore, dispersion agent 350g/t raw ore, flocculation agent 45g/t raw ore with yellow soda ash; Desliming is for the second time still adjusted pH value, consumption 4.0Kg/t raw ore, dispersion agent 150g/t raw ore, flocculation agent 15g/t raw ore with yellow soda ash; The waste water that twice desliming obtains merges, and adds flyash 9Kg/m
3, stir after 3 minutes, adjust pH value to 9.0 with nitric acid, add polyaluminium sulfate 20g/m
3, add cationic-type polyacrylamide (molecular weight 5,000,000) 0.5g/m after stirring again
3, stirring, medicament leaves standstill after fully acting on, solid-liquid separation then, solid suspension content is 1.0g/m in the clear water
3, clear water returns the desliming operation; Backwater desliming test remains grinding fineness and accounts for 60% for-0.074mm, and dispersion agent is saved in desliming for the first time, replenishes and adds yellow soda ash 1.5Kg/m
3, the flocculation agent consumption is the 45g/t raw ore; Still save for the second time dispersion agent, replenish and add yellow soda ash 0.9Kg/m
3, the flocculation agent consumption is the 15g/t raw ore.Clear water and backwater test-results see Table 2.
This shows that by using backwater, yellow soda ash and dispersant dosage all significantly reduce in the desliming with medicament, just flocculation agent slightly increases.Backwater all obtains utilizing.And separation index changes hardly.
Table 2: raw ore 2 recycling water utilization test-results
Embodiment 3
Test and Selection bauxite raw ore.Desliming method carries out desliming according to patent ZL 200610137993.2 statement methods, and grinding fineness accounts for 75% for-0.074mm, and wherein desliming is for the first time adjusted pH value, consumption 7.0Kg/t raw ore, dispersion agent 240g/t raw ore, flocculation agent 40g/t raw ore with yellow soda ash; Desliming is for the second time still adjusted pH value, consumption 4.0Kg/t raw ore, dispersion agent 100g/t raw ore, flocculation agent 15g/t raw ore with yellow soda ash; The waste water that twice desliming obtains merges, and adds flyash 4Kg/m
3, stir after 3 minutes, adjust pH value to 9.0 with hydrochloric acid, add polyaluminium sulfate 5.0g/m
3, add cationic-type polyacrylamide (molecular weight 8,000,000) 1.0g/m after stirring again
3, stirring, medicament leaves standstill after fully acting on, solid-liquid separation then, solid suspension content is 0.6g/m in the clear water
3, clear water returns the desliming operation; Backwater desliming test remains grinding fineness and accounts for 75% for-0.074mm, and dispersion agent is saved in desliming for the first time, replenishes and adds yellow soda ash 1.9Kg/m
3, the flocculation agent consumption is the 80g/t raw ore; Still save for the second time dispersion agent, replenish and add yellow soda ash 1.0Kg/m
3, the flocculation agent consumption is the 20g/t raw ore.Clear water and backwater test-results see Table 3.
This shows that by using backwater, yellow soda ash and dispersant dosage all significantly reduce in the desliming with medicament, just flocculation agent slightly increases.Backwater all obtains utilizing.And separation index changes hardly.
Table 3: raw ore 3 recycling water utilization test-results
Claims (7)
1. the treatment process of a deslimed wastewater for reverse flotation of bauxite, it is characterized in that its treating processes with deslimed wastewater for reverse flotation of bauxite under agitation add flyash successively, add mineral acid adjust the pH value less than 9, again add polyaluminium sulfate and/or cationic-type polyacrylamide after, carry out flocculating settling, the clear water of separate and subside utilizes again.
2. the treatment process of a kind of deslimed wastewater for reverse flotation of bauxite according to claim 1 is characterized in that described flyash add-on is 0.5～9Kg/m
3
3. the treatment process of a kind of deslimed wastewater for reverse flotation of bauxite according to claim 1, what it is characterized in that described adding adjusts that slurry pH adds less than 9 step is sulfuric acid, nitric acid or hydrochloric acid.
4. the treatment process of a kind of deslimed wastewater for reverse flotation of bauxite according to claim 1 is characterized in that described polyaluminium sulfate add-on is 5～20g/m
3
5. the treatment process of a kind of deslimed wastewater for reverse flotation of bauxite according to claim 1 is characterized in that described cationic-type polyacrylamide add-on is 0.5～2.0g/m
3
6. the treatment process of a kind of deslimed wastewater for reverse flotation of bauxite according to claim 1, the molecular weight that it is characterized in that described cationic-type polyacrylamide is more than 1,000,000.
7. the treatment process of a kind of deslimed wastewater for reverse flotation of bauxite according to claim 1, it is to be used for bauxite desliming or flotation operation process that the clear water that it is characterized in that described separate and subside utilizes again.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276035A (en) * | 2011-07-20 | 2011-12-14 | 安徽省通源环境节能有限公司 | Processing method for garbage leachate and processing apparatus thereof |
| CN102397820A (en) * | 2011-11-18 | 2012-04-04 | 中国铝业股份有限公司 | Method for utilizing bauxite dust |
| CN103316760A (en) * | 2013-06-09 | 2013-09-25 | 云南文山铝业有限公司 | Method for processing monohydrallite ore washing gangue |
| CN105016525A (en) * | 2015-07-09 | 2015-11-04 | 北京矿冶研究总院 | Copper-molybdenum ore beneficiation wastewater treatment method |
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| CN1053913A (en) * | 1990-02-09 | 1991-08-21 | 哈尔滨市环境保护局 | Method with clarifying urban sewage with powdered coal ash |
| CN1160682A (en) * | 1996-04-01 | 1997-10-01 | 国家***海洋环境保护研究所 | Composite coagulant for water treatment and its preparation process |
| CN1195648A (en) * | 1997-04-09 | 1998-10-14 | 昆明市环境科学研究所 | Sewage treatment coagulant containing aluminium salt and flyash and method for treating sewage of paper mill |
-
2010
- 2010-04-13 CN CN 201010147297 patent/CN101805085A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053913A (en) * | 1990-02-09 | 1991-08-21 | 哈尔滨市环境保护局 | Method with clarifying urban sewage with powdered coal ash |
| CN1160682A (en) * | 1996-04-01 | 1997-10-01 | 国家***海洋环境保护研究所 | Composite coagulant for water treatment and its preparation process |
| CN1195648A (en) * | 1997-04-09 | 1998-10-14 | 昆明市环境科学研究所 | Sewage treatment coagulant containing aluminium salt and flyash and method for treating sewage of paper mill |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276035A (en) * | 2011-07-20 | 2011-12-14 | 安徽省通源环境节能有限公司 | Processing method for garbage leachate and processing apparatus thereof |
| CN102397820A (en) * | 2011-11-18 | 2012-04-04 | 中国铝业股份有限公司 | Method for utilizing bauxite dust |
| CN103316760A (en) * | 2013-06-09 | 2013-09-25 | 云南文山铝业有限公司 | Method for processing monohydrallite ore washing gangue |
| CN103316760B (en) * | 2013-06-09 | 2016-04-20 | 云南文山铝业有限公司 | To the method that bauxite washup mine tailing processes |
| CN105016525A (en) * | 2015-07-09 | 2015-11-04 | 北京矿冶研究总院 | Copper-molybdenum ore beneficiation wastewater treatment method |
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Application publication date: 20100818 |