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Method of dewatering concentrated bauxite

A technology of bauxite and concentrate, which is 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: 2008-08-20
中铝中州铝业有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

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] The bauxite concentrate with a concentration of 65% settles the underflow, and calcium oxide is added as a filter aid. The amount of calcium oxide is 1% of the weight of the solid concentrate. The settled underflow and calcium oxide are mixed evenly and then filtered with a ceramic filter. From 16 tons / unit to 23 tons / unit, the filter cake moisture is 11.5%.

Embodiment 2

[0019] The bauxite concentrate with a concentration of 65% settles the underflow, and calcium hydroxide is added as a filter aid. The amount of calcium hydroxide is 1.5% of the weight of the solid concentrate. The settled underflow and calcium hydroxide are evenly stirred and filtered with a ceramic filter. , the filtration capacity has increased from 16 tons / unit to 21.3 tons / unit, and the filter cake moisture is 12.2%.

Embodiment 3

[0021] The bauxite concentrate with a concentration of 70% settles the underflow, and calcium carbonate is added as a filter aid. The amount of calcium carbonate is 2.5% of the solid concentrate weight. From 16.3 tons / unit to 24.6 tons / unit, 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] A dehydration method for bauxite concentrate concentrate, which relates to a solid-liquid separation method in metallurgical chemical process, especially a solid-liquid separation method for diaspore positive flotation concentrate pulp. Background technique [0002] In the production process of bauxite beneficiation and desiliconization, due to the fine particle size, high viscosity and electric charge of the bauxite positive flotation concentrate, the sedimentation and filtration and dehydration of the bauxite concentrate slurry are difficult. The inventor once disclosed a method for improving the sedimentation and filtration performance of 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 sulfate which is acidic 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 Patents(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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