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Parallel floatation process of desilionization for bauxite

A bauxite and desiliconization technology, applied in flotation, process efficiency improvement, solid separation, etc., can solve the problems of accelerating the tailings and concentrate settlement process, etc., to reduce organic content, increase production capacity and return water utilization The effect of efficient and efficient separation

Inactive Publication Date: 2006-11-29
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for efficiently separating aluminum in view of the shortcomings of the current bauxite flotation using a single positive flotation desiliconization technology and process or a single reverse flotation desilication technology and process. Parallel flotation for desiliconization of bauxite to ensure the quality of flotation concentrate, reduce flotation chemical consumption and organic content in concentrate, accelerate tailings and concentrate settlement process, improve filter capacity and return water utilization choose method

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  • Parallel floatation process of desilionization for bauxite

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Embodiment 1

[0020] Taking the low-grade bauxite in Gongyi, Henan as the test sample, the raw ore Al 2 o 3 60.93%, SiO 2 14.88%, the ratio of aluminum to silicon is 4.09, the principle process flow chart adopted is shown in figure 1 , the specific process of beneficiation and desiliconization is as follows:

[0021] a) Grinding and grading: use a mill to grind bauxite, the grinding fineness is -0.074mm, accounting for 80%, the overflow concentration is 38%, and the grinding products are classified by a 0.045mm high-frequency vibrating screen to obtain Coarse and fine grade products;

[0022] b) Flotation desiliconization: The fine-grained products that are classified are adjusted to a pH value of 9.5 with sodium carbonate, and the regulator sodium hexametaphosphate 60g / t, oleic acid, hydroxamic acid, naphthenic acid collector 700g / t t, after stirring for 5 minutes, enter the flotation operation. After adopting the process of first roughing, second finishing and second sweeping, the foa...

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Abstract

The invention relates to a parallel floatation selecting method for bauxite desilication that adopts one section or two sections grinding technology to take classification to the bauxite pulp to gain raw and fine class product. The fine class product adopts positive floatation technology, and the raw class product adopts reverse floatation technology after taking or not taking second grinding. The positive floatation mine and the reverse floatation mine could be mixed to form final fine mine, and the positive floatation tail mine and the reverse floatation tail mine would be mixed to form final tail mine. The invention has great advantages and has wide application prospect.

Description

technical field [0001] The invention relates to a parallel flotation method for desiliconization of bauxite, and relates to a method for producing alumina concentrate through flotation desiliconization of bauxite. technical background [0002] More than 80% of my country's bauxite resources are medium-low-grade diaspore-type ores with an aluminum-silicon ratio of 4-8. The key to the success of processing this resource is to increase the aluminum-silicon ratio of bauxite through mineral processing methods, and then use The economical Bayer process produces alumina. At present, two technological prototypes of bauxite beneficiation and desiliconization have been formed - bauxite positive flotation desilication technology and bauxite reverse flotation desilication technology. [0003] In the bauxite positive flotation desiliconization process technology, the flotation technical index is good, the aluminum-silicon ratio of the concentrate and the recovery rate are high; however, ...

Claims

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Application Information

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IPC IPC(8): C22B3/00C22B1/00C22B1/14B03D1/002B03D1/02
CPCY02P10/20
Inventor 陈湘清李旺兴
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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