Dewatering process screening fine ore of alumyte

A technology of bauxite and flotation concentrate, applied in the direction of separation methods, chemical instruments and methods, aluminum compounds, etc., can solve the problems of poor filtration performance and weak dehydration performance, and achieve settlement and filtration performance and filter cake Moisture improvement, reduction of production energy consumption and beneficiation costs, and the effect of increasing the treatment process

Inactive Publication Date: 2008-09-03
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method that can effectively improve the concentration filtration capacity, reduce production costs and Dehydration method of bauxite beneficiation concentrate with energy consumption, simple operation, strong operability, and reduced bauxite beneficiation cost

Method used

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  • Dewatering process screening fine ore of alumyte

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Comparison scheme
Effect test

Embodiment 1

[0015] The bauxite concentrate with a concentration of 10% is classified under the action of a hydrocyclone, and the classification limit is 5 μm; +5 μm particles first enter the thickener, and the concentration is increased to 70% at a pH value of 7.2 Afterwards, the ceramic filter is used for filtration, and the filtration capacity is from 210kg / m before classification. 2 .h increased to 348kg / m 2 .h, filter cake moisture 11.9%; -5μm fine particles are raised to 45% by sedimentation method under the condition of pH value 6.2, and then treated by pressure filtration and adding dehydrating agent, the water content is 19.8%.

Embodiment 2

[0017] The bauxite concentrate with a concentration of 10% is classified under the action of a hydrocyclone, and the classification limit is 10 μm; +10 μm particles first enter the thickener, and the concentration is increased to 70% under the condition of a pH value of 7.6 Afterwards, the ceramic filter is used for filtration, and the filtration capacity is from 210kg / m before classification. 2 .h increased to 452kg / m 2 .h, filter cake moisture 10.6%; -10μm fine particles are raised to 49% by sedimentation method under the condition of pH value 6.5, and then treated by pressure filtration and adding dehydrating agent, the water content is 17.6%.

Embodiment 3

[0019] The bauxite concentrate with a concentration of 10% is classified under the action of a spiral classifier, and the classification limit is 25 μm; +25 μm particles first enter the thickener, and the concentration is increased to 71% under the condition of pH value 7.2 Ceramic filter is used for filtration, and the filtration capacity is from 210kg / m before classification. 2 .h increased to 764kg / m 2 .h, filter cake moisture 9.5%; -25μm fine particles are raised to 52% by sedimentation method under the condition of pH value 6.4, and then treated by pressure filtration and adding dehydrating agent, the moisture content is 16.9%.

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Abstract

The invention relates to a dewatering method for bauxite concentrate, and the method is used in the solid-liquid separation processes of a diasporite positive flotation concentrate product. The method comprises the operations such as classification, sedimentation, filtration, etc. The invention is characterized in that the diasporite positive flotation concentrate product is classified by adopting classifying equipment such as a hydraulic cyclone, etc., the classification size is 5 to 50 micrometer; after the classification the coarse concentrate and the fine-sized concentrate undergo the sedimentation and the filtration respectively, and are combined into the final concentrate. The method of the invention is simple and feasible, and can obviously improve the sedimentation and the filtration performances as well as the filter cake moisture of the bauxite concentrate, thereby greatly reducing the energy consumption and the mineral processing cost of the aluminum oxide production.

Description

technical field [0001] The invention relates to a dehydration method of bauxite beneficiation concentrate, which is mainly used in the solid-liquid separation process of diaspore positive flotation concentrate product. Background technique [0002] More than 80% of my country's bauxite resources are medium and low-grade diaspore-type ores with an aluminum-silicon ratio of 3 to 6. The key to effectively utilizing this resource is to increase the aluminum-silicon ratio of bauxite through mineral processing methods, and then use advanced The Bayer process produces alumina. At present, the desiliconization of medium and low-grade bauxite has been industrialized, among which the filtration of bauxite concentrate is an important link between mineral processing and alumina production, and the moisture content of the concentrate filter cake directly affects The energy consumption of alumina production will affect the production cost, and the production capacity of concentrate filter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D37/00B01D36/00C01F7/00
Inventor 陈湘清李旺兴马俊伟
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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