CN100411706C - Method of dewatering concentrated bauxite - Google Patents

Method of dewatering concentrated bauxite Download PDF

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Publication number
CN100411706C
CN100411706C CNB2006101037850A CN200610103785A CN100411706C CN 100411706 C CN100411706 C CN 100411706C CN B2006101037850 A CNB2006101037850 A CN B2006101037850A CN 200610103785 A CN200610103785 A CN 200610103785A CN 100411706 C CN100411706 C CN 100411706C
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China
Prior art keywords
bauxite
calcium
concentrate
filter
dewatering
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CNB2006101037850A
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CN1887402A (en
Inventor
刘焦萍
赵东锋
刘亚平
晏化钎
刘伟
黄春成
吴国亮
李军伟
李太昌
李国兵
李正东
吴长河
郑好民
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Chalco Zhongzhou Aluminium Industry Co Ltd
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Aluminum Corp of China Ltd
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Abstract

The present invention discloses method of dewatering concentrated bauxite, and features that during filtering and dewatering concentrated bauxite pulp, compound containing Ca2+ ion is added as the filter aid, with the filter aid adding amount being 0.5-5 wt% of solid concentrated bauxite. The method is simple and practical, and has high concentrated bauxite dewatering efficiency, concentrated bauxite filtering capacity 30-50 % raised, and no influence on the subsequent Bayer process production.

Description

A kind of dewatering of bauxite concentrate selection
Technical field
A kind of dewatering of bauxite concentrate selection relates to a kind of solid-liquid separating method, the particularly solid-liquid separating method of diaspore direct flotation concentrate pulp of metallurgy chemical process.
Background technology
In the mineral dressing and silicon removal of bauxite production process because the bauxite forward flotation granularity of concentrate is thin, viscosity is high, electrically charged, make the sedimentation and the filtering means dehydration difficulty of bauxite concentrate ore pulp.The inventor once disclosed a kind of method of improving bauxite concentrate selection settling ore pulp and strainability in Chinese invention patent " a kind of slurry liquid solid separating method for alumyte concentrate " (application number 200410100974.3), this method is acid sulfate after at first adding sulfuric acid or hydrolysis in the flotation concentrate slurry, the PH of concentrate selection ore pulp is adjusted to 7.5-8.5, add organic flocculant again and carry out flocculation separation, separate and be acid sulfate after the underflow that obtains adds sulfuric acid or hydrolysis again, PH is adjusted to 6.5-7.5 with ore pulp, carries out filtering means dehydration then.The processed of present existing bauxite forward flotation concentrate pulp has just adopted this method.The inventor thinks in further producing and studying, the solid separation method of above-mentioned this bauxite concentrate selection, what emphasis solved is the settlement issues of bauxite concentrate selection ore pulp, by improving sedimentation underflow density (also being the filter input concentration) production capacity of filter plant is improved, but the amplitude that this production capacity improves is limited, therefore need a kind of simple and easy to do, process is simple, improved dewatering, production capacity so that further raising concentrate filters could satisfy the demand of the Bayer process of follow-up continuous expansion to the concentrate raw material.
Summary of the invention
The objective of the invention is in order to overcome the deficiency that prior art exists, a kind of dewatering of simple and easy to do bauxite concentrate selection is provided, reach the purpose that further raising bauxite concentrate selection filters production capacity.
The present invention is achieved by the following technical solutions.
A kind of dewatering of bauxite concentrate selection is characterized in that interpolation contains Ca when the bauxite concentrate selection slurry filtration dewaters 2+Compound make filter aid, the addition of filter aid is the 0.5%-3% of solid concentrate weight.
The dewatering of a kind of bauxite concentrate selection of the present invention is characterized in that containing Ca 2+Compound be a kind of in calcium oxide, calcium hydroxide, calcium carbonate, calcium chloride, calcirm-fluoride, calcium sulfate, calcium aluminate, the calcium aluminosilicate hydrate.
Show that through experiment of the present invention the ore concentration of bauxite concentrate pulp was adjusted PH and added the organic flocculant sedimentation with inorganic flocculant after, further again the interpolation contained Ca 2+Compound, help the dewatering and filtering of bauxite concentrate.With the calcium oxide is example, contains Ca 2+Compound for the dehydration of bauxite concentrate following effect is arranged:
(1) further improved the flocculating setting efficient of bauxite concentrate selection ore pulp.
After in the bauxite concentrate selection ore pulp, adding calcium oxide, can utilize to form Ca (OH) 2Sedimentary net is caught volume and is swept effect, strengthen the sedimentation flocculation, simultaneous oxidation calcium can also generate the calcium aluminate with big adsorption area with a series of hydrolyzed reaction products of inorganic flocculant (as aluminum sulfate), the strong adsorption colloidal solid, thereby make subparticle be condensed into larger particles, reduce the viscosity of ore pulp, helped the filtering means dehydration of concentrate selection.
(2) eliminated the influence of flotation collector to filtering.
In the bauxite concentrate selection filter process, also there is the influence of floating agent in the factor that influences filter effect except the feeding granularity that it is generally acknowledged, feed concentration etc.The collecting agent of bauxite forward flotation is the anion collecting agent based on aliphatic acid, has 70% collecting agent to enter into concentrate pulp after the flotation approximately, and wherein the concentrate solid has 40% collecting agent.Because aliphatic acid is a kind of hydrophobic surface reactive material, and has a stronger frothing capacity, it forms one deck oil film on filter plate when concentrate filters, foam is full of and very easily stops up filter cake in the filter cake hole simultaneously, thereby hindered concentrate the rate of filtration, worsen filter dehydration process, so the inventor thinks, eliminates the influence that collecting agent filters concentrate effectively, can improve the water penetration of concentrate particle, improve and filter production capacity.In concentrate pulp, add calcium oxide,, thereby can remove sea surface oil slick, minimizing foam, of the influence of elimination fatty-acid collector, the concentrate rate of filtration is accelerated filtering because calcium ion can generate fatty acid calcium with aliphatic acid.
(3) production to follow-up Bayer process does not have adverse effect
Because in follow-up Bayer process is produced, the calcium oxide etc. that itself just needs to add the heavy 8%-13% of dried concentrate during the stripping batching contains Ca 2+Compound, with eliminate titaniferous ore harm in the high pressure process in leaching, improve aluminium oxide dissolution rate, reduce alkaline consumption, improve red-mud settlement performance etc., therefore when the concentrate selection filtering means dehydration, add and contain Ca 2+Filter aid after, can not exert an influence to the production of follow-up Bayer process, only need calcium oxide content according to the concentrate filter cake, when stripping is prepared burden, join a part of calcium oxide less and get final product.
Method of the present invention contains Ca by adding in the bauxite concentrate selection ore pulp 2+Filter aid, further improved the flocculating setting efficient of bauxite concentrate selection, eliminated the influence of flotation collector to filtering, make that filtering production capacity has improved 30%-50%, and technology is simple, easy row, simultaneously follow-up Bayer process production is not had adverse influence.
The specific embodiment
A kind of dewatering of bauxite concentrate selection is characterized in that interpolation contains Ca when the bauxite concentrate selection slurry filtration dewaters 2+Compound make filter aid, the addition of filter aid is the 0.5%-3% of solid concentrate weight.It contains Ca 2+Compound be a kind of in calcium oxide, calcium hydroxide, calcium carbonate, calcium chloride, calcirm-fluoride, calcium sulfate, calcium aluminate, the calcium aluminosilicate hydrate.
Embodiment 1
The bauxite concentrate selection sedimentation underflow of concentration 65%, add calcium oxide as filter aid, the consumption of calcium oxide is 1% of a solid concentrate weight, filters with ceramic filter after sedimentation underflow and calcium oxide stir, filter production capacity and bring up to 23 tons/platform from 16 tons/platform, filter cake moisture 11.5%.
Embodiment 2
The bauxite concentrate selection sedimentation underflow of concentration 65%, add calcium hydroxide as filter aid, the consumption of calcium hydroxide is 1.5% of a solid concentrate weight, after stirring, sedimentation underflow and calcium hydroxide filters with ceramic filter, filter production capacity and bring up to 21.3 tons/platform from 16 tons/platform, filter cake moisture 12.2%.
Embodiment 3
The bauxite concentrate selection sedimentation underflow of concentration 70%, add calcium carbonate as filter aid, the consumption of calcium carbonate is 2.5% of a solid concentrate weight, after stirring, sedimentation underflow and calcium carbonate filters with ceramic filter, filter production capacity and bring up to 24.6 tons/platform from 16.3 tons/platform, filter cake moisture 13.2%.
Embodiment 4
The bauxite concentrate selection sedimentation underflow of concentration 69%, add calcium chloride as filter aid, the consumption of calcium chloride is 3% of a solid concentrate weight, filters with ceramic filter after sedimentation underflow and calcium carbonate stir, filter production capacity and bring up to 27 tons/platform from 18 tons/platform, filter cake moisture 12.2%.
Embodiment 5
The bauxite concentrate selection sedimentation underflow of concentration 70%, add calcium sulfate as filter aid, the consumption of calcium sulfate is 3% of a solid concentrate weight, filters with ceramic filter after sedimentation underflow and calcium carbonate stir, filter production capacity and bring up to 27 tons/platform from 17.5 tons/platform, filter cake moisture 11.8%.
Embodiment 6
The bauxite concentrate selection sedimentation underflow of concentration 70%, add calcirm-fluoride as filter aid, the consumption of calcirm-fluoride is 0.5% of a solid concentrate weight, filters with ceramic filter after sedimentation underflow and calcium carbonate stir, filter production capacity and bring up to 25.5 tons/platform from 17 tons/platform, filter cake moisture 12.2%.
Embodiment 7
The bauxite concentrate selection sedimentation underflow of concentration 71%, add calcium aluminate as filter aid, the consumption of calcium aluminate is 5% of a solid concentrate weight, filters with ceramic filter after sedimentation underflow and calcium carbonate stir, filter production capacity and bring up to 23 tons/platform from 18 tons/platform, filter cake moisture 12.4%.
Embodiment 8
The bauxite concentrate selection sedimentation underflow of concentration 68.3%, add calcium aluminosilicate hydrate as filter aid, the consumption of calcium aluminosilicate hydrate is 5% of a solid concentrate weight, after stirring, sedimentation underflow and calcium carbonate filters with ceramic filter, filter production capacity and bring up to 20.2 tons/platform from 15.5 tons/platform, filter cake moisture 13.1%.

Claims (2)

1. the dewatering of a bauxite concentrate selection is characterized in that interpolation contains Ca when the bauxite concentrate selection slurry filtration dewaters 2+Compound make filter aid, the addition of filter aid is the 0.5%-3% of solid concentrate weight.
2. the dewatering of a kind of bauxite concentrate selection according to claim 1 is characterized in that containing Ca 2+Compound be a kind of in calcium oxide, calcium hydroxide, calcium carbonate, calcium chloride, calcirm-fluoride, calcium sulfate, calcium aluminate, the calcium aluminosilicate hydrate.
CNB2006101037850A 2006-08-01 2006-08-01 Method of dewatering concentrated bauxite Active CN100411706C (en)

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CN100411706C true CN100411706C (en) 2008-08-20

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103506226B (en) * 2012-06-27 2015-09-30 沈阳铝镁设计研究院有限公司 High-sulfur bauxite reverse flotation product High-efficiency dehydration technology
CN102806137B (en) * 2012-09-12 2014-07-30 中国地质科学院矿产综合利用研究所 Method for treating sulfur-containing bauxite
CN102962140A (en) * 2012-11-29 2013-03-13 中国铝业股份有限公司 Ore dressing method of bauxite
CN103332804A (en) * 2013-06-05 2013-10-02 云南文山铝业有限公司 Solid-liquid separation method for tailing pulp
CN113600347B (en) * 2021-07-21 2022-11-08 宜都兴发化工有限公司 Filter-pressing release agent for phosphate rock flotation tailings and use method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004115283A (en) * 2002-09-24 2004-04-15 Showa Denko Kk Manufacturing process of aluminum hydroxide
US6740249B1 (en) * 1999-01-20 2004-05-25 Nalco Company Filtration aid for the bayer process
CN1621159A (en) * 2004-12-28 2005-06-01 中国铝业股份有限公司 Flotation gangue subsidence method of alumyte
CN1621158A (en) * 2004-12-28 2005-06-01 中国铝业股份有限公司 Slurry liquid solid separating method for alumyte concentrate
CN1806889A (en) * 2005-12-23 2006-07-26 沈阳铝镁设计研究院 Bauxite concentrate selection filtering unit and filtering method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6740249B1 (en) * 1999-01-20 2004-05-25 Nalco Company Filtration aid for the bayer process
JP2004115283A (en) * 2002-09-24 2004-04-15 Showa Denko Kk Manufacturing process of aluminum hydroxide
CN1621159A (en) * 2004-12-28 2005-06-01 中国铝业股份有限公司 Flotation gangue subsidence method of alumyte
CN1621158A (en) * 2004-12-28 2005-06-01 中国铝业股份有限公司 Slurry liquid solid separating method for alumyte concentrate
CN1806889A (en) * 2005-12-23 2006-07-26 沈阳铝镁设计研究院 Bauxite concentrate selection filtering unit and filtering method

Non-Patent Citations (2)

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拜耳法助滤剂研制. 潘明亮等.轻金属,第2期. 2006
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Effective date of registration: 20170531

Address after: 454171 Henan city of Jiaozuo province Xiuwu County Qixian town Zhongzhou aluminum plant

Patentee after: Chalco Zhongzhou Aluminium Industry Co., Ltd.

Address before: 100814, Haidian District, Fuxing Road, Beijing No. 12, China Aluminum Limited by Share Ltd

Patentee before: Aluminum Corporation of China Limited