Method for mineral dressing and silicon removal of bauxite

A bauxite and desiliconization technology, which is applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of difficult filtration of ore dressing products, long flotation process flow, fine particle size of flotation feed, etc., to achieve Increase economic and social benefits, good process technology and economic indicators, and reduce energy consumption

Inactive Publication Date: 2010-10-06
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and to provide a method that can effectively solve the problems of low mill processing capacity, high energy consumption, fine flotation feed particle size, long flotation process flow, difficulty in filtering mineral processing products and water return. Bauxite ore beneficiation and desiliconization method that is difficult to utilize

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  • Method for mineral dressing and silicon removal of bauxite
  • Method for mineral dressing and silicon removal of bauxite
  • Method for mineral dressing and silicon removal of bauxite

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Embodiment 1

[0021] Taking Henan bauxite as the test sample, the raw ore Al 2 o 3 60.15%, SiO 2 11.76%, and the aluminum-silicon ratio is 5.11. See attached process flow chart figure 1 , the specific process of desiliconization is as follows:

[0022] Low-grade bauxite in Henan is ground in a Φ1500×1500 ball mill with a processing capacity of 2t / h. After being classified by a spiral classifier, the sand is turned and returned to the mill for regrinding. The overflow enters the double-layer high-frequency vibrating screen for classification. , after classification by high-frequency vibrating screen, three products are obtained, the coarse particles of +0.3mm are returned to the mill for regrinding, the intermediate particles of +0.1mm~-0.3mm are used as coarse concentrates, and the fine particles of -0.1mm enter the flotation system, the materials entering the flotation system go through a rough-fine closed-circuit flotation process to obtain concentrate 1 and tailings. The results o...

Embodiment 2

[0028] Taking a foreign bauxite as the test sample, the raw ore Al 2 o 3 66.30%, SiO 2 10.68%, and the aluminum-silicon ratio is 6.21. See attached process flow chart figure 2 , the specific process of desiliconization is as follows:

[0029] Foreign bauxite is ground in a ball mill with a processing capacity of 3t / h. After being classified by a spiral classifier, the sand is turned and returned to the mill for regrinding. The overflow enters the double-layer high-frequency vibrating screen for classification, and the high-frequency vibrating screen After grading, three products are obtained. The coarse particles of +0.25mm are returned to the mill for regrinding, the intermediate particles of +0.075mm~-0.25mm are directly entered into the selection link of the flotation system for flotation desiliconization, and the fine particles of -0.075mm are The particles enter the flotation system and undergo a rough-fine closed-circuit flotation process to obtain concentrate and...

Embodiment 3

[0035] Taking Shanxi bauxite as the test sample, the raw ore Al 2 o 3 59.43%, SiO 2 12.26%, and the aluminum-silicon ratio is 4.85. See attached process flow chart image 3 , the specific process of desiliconization is as follows:

[0036] The low-grade bauxite in Henan is ground in a Φ2100×2700 ball mill with a processing capacity of 5t / h. After being classified by the first-stage spiral classifier, the sand is turned back to the mill for re-grinding, and the overflow enters the second-stage classifying cyclone for classification. ;The second-stage grading cyclone enters the double-layer high-frequency vibrating screen for classification, the coarse particles of +0.15mm return to the mill for regrinding, and the -0.037mm fine particles enter the flotation system together with the overflow of the second-stage grading cyclone. +0.037mm~-0.15mm intermediate size particles directly enter the flotation system for beneficiation and desiliconization; two products, concentrate ...

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Abstract

The invention provides a method for mineral dressing and silicon removal of bauxite, and particularly relates to a method for mineral dressing and silicon removal of diaspore type bauxite. The method comprises an ore-grinding grading process and a flotation silicon removal process, and is characterized in that: the product of ore grinding is graded for two or three times, wherein a double-layer high-frequency vibrating screen is used at the last time of grading; and among three products obtained by grading of the double-layer high-frequency vibrating screen, large-size grains are reground and re-dressed, medium-size grains are used as rough concentrates or enter the flotation system for concentration, and small-size grains enter the flotation system for flotation silicon removal. The method has the advantages of effectively solving the technical problem that the grinding machine is high in energy consumption and low in treating capacity, the problem that the grain size of the flotation materials is small and other problems, better performing flotation silicon removal of bauxite, obtaining bauxite concentrates with qualified grade, along with good process technique and economic indexes.

Description

technical field [0001] A method for beneficiation and desiliconization of bauxite, in particular a method for beneficiation and desiliconization of diaspore type bauxite. Background technique [0002] Bauxite, also known as bauxite, is the main raw material for the production of alumina. According to the types of useful mineral components in the ore, bauxite can be divided into three basic types: diaspore type, boehmite type and gibbsite type. [0003] my country is relatively rich in bauxite resources, with proven reserves of 2.3 billion tons, ranking fourth in the world. It is mainly diaspore type bauxite, which has the outstanding characteristics of high aluminum, high silicon and low iron. Although Al in my country's bauxite 2 o 3 The content is relatively high, but due to the high SiO content in the ore 2 , so the aluminum-silicon ratio of the ore is generally low. my country's low-grade bauxite beneficiation and desiliconization have successively passed a series o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00B03D1/00
Inventor 陈湘清张建强陈兴华陈占华马俊伟周杰强郭鑫闫琨胡秋云李花霞李素敏
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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