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Dispersion and control-selective desliming method in bauxite

A reverse flotation and bauxite technology, applied in flotation, solid separation, etc., can solve the problems of slow flotation speed of fine-grained aluminosilicate minerals, reduced collector selectivity, long reverse flotation time, etc. , to achieve the effect of saving flotation equipment, significant economic and social benefits, and shortened flotation time

Inactive Publication Date: 2006-05-31
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

[0004] The main disadvantage of adopting non-deliming reverse flotation desiliconization process is: grinding operation, aluminosilicate minerals in the ore are easier to grind than diaspore, when the particle size of the grinding product is -0.074mm, it accounts for 70-90% Around, aluminosilicate minerals are mainly distributed in the particle size of less than -0.032mm. The primary slime in the ore and the secondary slime produced after grinding will affect the flotation operation; during flotation, the aluminosilicate minerals The main ore slime has a large surface area and strong chemical adsorption capacity, which leads to a decrease in the selectivity of the collector and consumes a large amount of flotation reagents; in addition, the flotation speed of fine-grained aluminosilicate minerals is slow, resulting in long reverse flotation time , flotation equipment and more

Method used

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Embodiment Construction

[0012] 1. Use Henan bauxite with an aluminum-silicon ratio A / S of 5.67. The main mineral is diaspore, with a content of about 53.4% ​​to 53.8%. Followed by pyrophyllite (content is about 14.7% ~ 17.4%), illite (content is about 16.5% ~ 15.8%), a small amount of clinochlorite (content is about 9.3% ~ 12.6%), a small amount of kaolinite ( The content is about 3% to 3.5%). The continuous separation process system is as follows: the particle size of the grinding product is -0.074mm, accounting for about 86%, the amount of dispersant sodium carbonate is 3800g / t; The concentration is 35%; the pH of the flotation system is controlled at around pH 6, and reverse flotation is carried out with alkyl halide quaternary ammonium salts as collectors. Controlled dispersion-selective desliming operation to get the aluminum-silicon ratio of 1.70 ore sludge as tailings discharge, after desliming, the aluminum-silicon ratio of sand settling is 7.20 (1.53 higher than the raw ore aluminum-silicon...

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Abstract

A controlled dispersing-selective desliming method in the reverse floatation of bauxite features that according to the difference of various components in said bauxite in crushibility and surface characteristics, the sodium carbonate as disperser is added during the grinding step. Its advantages are high grinding efficiency, low consumption of floatating agent, and high Al-Si ratio in ore sludge.

Description

technical field [0001] The invention relates to a diaspore-type bauxite reverse flotation method for raw ore-a diaspore-type bauxite controlled dispersion-selective desliming method after grinding, which belongs to mineral processing engineering. Background technique [0002] China's bauxite is dominated by diaspore type bauxite, most of which are medium and low-grade ores (about 80% with A / S=4-8), with high silica content and difficult alumina dissolution . The characteristics of this kind of bauxite resources determine that most of the production methods and processes of alumina in our country adopt the hybrid method and sintering method, which makes the alumina production have high energy consumption, complicated process and high cost. At present, the beneficiation (flotation)-Bayer process is considered to be an effective way to process diaspore-type bauxite resources in my country and realize efficient and low-energy production of alumina. [0003] Bauxite reverse flo...

Claims

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Application Information

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IPC IPC(8): B03D1/00
Inventor 胡岳华李旺兴王毓华顾帼华何平波邓海波覃文庆赵清杰
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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