Flotation desilication method for bauxite

A bauxite and flotation technology, applied in flotation, solid separation, etc., can solve problems such as complex process flow, difficulty in floating coarse grains, and poor process indicators, and achieve good process stability, significant economic benefits, and high efficiency. The effect of recovery

Active Publication Date: 2006-12-27
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

In the fully closed-circuit flotation process, bauxite needs fine grinding, high energy consumption, low production capacity, difficulty in flotation of coarse particles, and poor process indicators
For the concentrate reclassification process, the process flow is a little complicated; the process flow of separate flotation of coarse and fine particles is complicated

Method used

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  • Flotation desilication method for bauxite

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Embodiment Construction

[0015] A bauxite flotation desiliconization method, including grinding, grading and flotation processes, when the grinding fineness is -0.074mm and accounts for 30%-95%, after pre-classification, fine-grained products and coarse-grained products are obtained The fine-grained product directly enters the flotation process through the action of the flotation agent, and produces selected foam; Grinding products and fine-grained flotation foam products enter the beneficiation operation at the same time, and the final concentrate is obtained after flotation. After the raw ore undergoes a stage of closed-circuit grinding and grading, it enters the second stage of pre-grading, and the fine-grained grades obtained enter the roughing operation after being interacted with the flotation agent in the mixing tank. Concentration II operation, foam as the final concentrate; the second-stage pre-graded coarse-grained medium ore is subjected to the second-stage open-circuit grinding, and after ...

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Abstract

Disclosed is a floatation desilication process for bauxite, comprising grinding, classifying and floatation, wherein the raw materials are pre-separated to give fine products and coarse products on condition that -0.074mm grinding fineness is 30 to 95%, and fine products react with floatation agent by floatation process to yield refined foam; coarse products are reground to give the reground products which react with floatation agent, and then are processed in refining process, the mixture of reground coarse products and fine products are refined to give final concentrate, refined underflow returns in sequence and the scavenging underflow becomes the final mine tailing. Quick floatation of coarse particles and high recovery rate and quality of concentrate can be realized, and as a result, the level of resources utilization and economic benefit can be improved remarkably.

Description

technical field [0001] The invention relates to a bauxite flotation desiliconization method. technical background [0002] my country's bauxite reserves are abundant, but most of them are low- and medium-grade diaspore-type bauxite, which cannot be directly applied to the Bayer process with low production costs. . Flotation desilication is the most effective and economical method. [0003] At present, there are many positive flotation desiliconization technologies and processes for bauxite. One is the closed-circuit flotation process. The process of selecting the final concentrate of foam, sweeping the tailings into the final tailings, returning the underflow to the rougher, and returning the foam to the rougher. The other two variants of this process are (1) classifying the underflow, The coarse-grained grade is combined with the flotation concentrate to form the final concentrate, and the fine-grained grade is combined with the flotation tailings to form the final tailin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02B03D1/004B03B1/00B03D101/02
Inventor 陈湘清李旺兴樊大林陈兴华余峰涛尹中林晏唯真陈志友马俊伟徐祥斌胡秋云武国宝
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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