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Flotation gangue subsidence method of alumyte

A technology for flotation of tailings and bauxite, applied in selective sedimentation, solid separation and other directions, can solve the problems of high treatment cost, low underflow concentration, inability to achieve dry storage, etc., and achieve the effect of improving settling performance

Inactive Publication Date: 2005-06-01
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the settlement, the solid content of the floating matter is about 5.6g / l, the concentration of the underflow is low, and the weight concentration is still about 10%, so dry storage cannot be realized. The overflow water of the tailings thickener has a high treatment cost due to its high solid content. Exhaust can easily cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the tailings with a pH of 9.5 and a mass concentration of 9%, add aluminum sulfate with a mass concentration of 20%, adjust the pH of the pulp to 7.1, and then add an organic flocculant polyacrylamide with a dry mineral content of 0.001%, and the underflow concentration is 25%. , the overflow float content reaches 0.8g / l, reusing this part of the overflow water has no adverse effect on production.

Embodiment 2

[0030] In the tailings with a pH of 10 and a concentration of 10%, add aluminum sulfate with a mass concentration of 30%, adjust the pH of the slurry to 7.5, and then add an organic flocculant polyacrylamide with a dry mineral content of 0.01%, and the underflow concentration is 22%. The content of overflow floating matter reaches 0.1g / l, and reusing this part of overflow water has no adverse effect on production.

Embodiment 3

[0032] In the tailings with a pH of 11 and a concentration of 12%, add sulfuric acid with a mass concentration of 10%, adjust the pH of the slurry to 6.5, and then add an organic flocculant polyacrylamide with a dry ore content of 0.005%, and the concentration of the underflow is 26%. The content of floating matter in the flow reaches 0.2g / l, and the reuse of this part of the overflow water has no adverse effect on production.

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PUM

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Abstract

The present invention relates to the deposition dewatering process of floated tail ore, and is especially the deposition dewatering process of floated tail ore of diaspore type alumyte. The present invention features that into the floated tail ore slurry, sulfuric acid or sulfate, aluminum sulfate, ferrous sulfate, zinc sulfate, copper sulfate, barium sulfate or alum in acidity after hydrolysis is first added to regulate pH value to 6.5-7.5; and polyacrylamide as organic flocculant in the amount of 0.001-0.01 % of the dry tail ore slurry weight is then added for flocculation and deposition. The present invention can raise the concentration of tail ore slurry from 6-11 % to over 25 %, reduce the overflow floated matter to below 1 g / L and make the overflow water capable of being reused.

Description

technical field [0001] A method for settling bauxite flotation tailings, which relates to a settling and dehydration method for flotation tailings in the beneficiation process, and in particular involves the use of diaspore-type bauxite as raw material in the flotation process. Shizheng flotation tailings settlement method. Background technique [0002] In the flotation process of diaspore type bauxite, due to the complex composition of bauxite ore, gangue minerals contain kaolinite, illite, pyrophyllite, chlorite, etc., and diaspore is more complex than gangue The hardness of minerals is relatively high, so kaolinite, illite, pyrophyllite and other silicon-containing gangue minerals are preferentially dissociated and muddy during grinding, which results in extremely fine particle size of flotation tailings, with a particle size below 10.48um and a content of 80 %above. At the same time, because the agent usually added in positive flotation is an anionic collector, the sur...

Claims

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Application Information

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IPC IPC(8): B03D3/06
Inventor 李培增张吉龙刘伟吴国亮刘焦萍王永红孟杰汪明宏李军伟崔硕幺海青黄春成
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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