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Method of dewatering concentrated bauxite

A bauxite and concentrate technology, applied in the field of solid-liquid separation of diaspore positive flotation concentrate slurry, can solve the problems of limited increase in production capacity, achieve increased filtration capacity, simple process, and improved flocculation The effect of settling efficiency

Active Publication Date: 2007-01-03
中铝中州铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventor thinks in further production and research, the liquid-solid separation method of above-mentioned this bauxite concentrate ore, what the key point of solution is the settlement problem of bauxite concentrate ore slurry, by improving the settlement underflow concentration (that is to say filter feed concentration) has improved the capacity of the filtration equipment, but the range of this capacity increase is limited, so a simple, simple, and improved dehydration method is needed to further increase the capacity of concentrate filtration. To meet the subsequent expanding Bayer process demand for concentrate raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Concentration of 65% bauxite concentrate sedimentation underflow, add calcium oxide as a filter aid, the amount of calcium oxide is 1% of the weight of the solid concentrate, the sedimentation underflow and calcium oxide are stirred evenly and then filtered with a ceramic filter, the filtration capacity Increased from 16 tons / set to 23 tons / set, filter cake moisture 11.5%.

Embodiment 2

[0019] Concentration of 65% bauxite concentrate sedimentation underflow, add calcium hydroxide as a filter aid, the amount of calcium hydroxide is 1.5% of the weight of the solid concentrate, the sedimentation underflow and calcium hydroxide are stirred evenly and then filtered with a ceramic filter , Filtration capacity increased from 16 tons / set to 21.3 tons / set, filter cake moisture 12.2%.

Embodiment 3

[0021] Concentration of 70% of the bauxite concentrate sedimentation underflow, add calcium carbonate as a filter aid, the amount of calcium carbonate is 2.5% of the weight of the solid concentrate, the sedimentation underflow and calcium carbonate are stirred evenly and then filtered with a ceramic filter, the filtration capacity From 16.3 tons / set to 24.6 tons / set, the filter cake moisture is 13.2%.

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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

technical field [0001] The invention relates to a dehydration method of bauxite beneficiation concentrate, which relates to a solid-liquid separation method in metallurgical chemical process, in particular to a solid-liquid separation method of diaspore positive flotation concentrate slurry. Background technique [0002] In the production process of bauxite beneficiation and desiliconization, due to the fine particle size, high viscosity and charge of bauxite positive flotation concentrate, it is difficult to settle and filter and dehydrate the bauxite concentrate slurry. The inventor once disclosed a method for improving the sedimentation and filtration performance of the bauxite concentrate slurry in the Chinese invention patent "A Method for Liquid-Solid Separation of Bauxite Concentrate Slurry" (application number 200410100974.3). Method First, add sulfuric acid or acidic sulfate after hydrolysis to the flotation concentrate pulp, adjust the pH of the concentrate pulp to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D37/02
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
Owner 中铝中州铝业有限公司
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