Deposition dehydrating method for processing concentrate or tailing by bauxite

A technology for bauxite and tailings, applied in the direction of selective deposition, solid separation, etc., to achieve obvious environmental protection benefits, environmental friendliness, and water saving effects

Active Publication Date: 2008-05-21
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a simple, easy, low-cost, and environmentally friendly method for high-efficiency sedimentation and dehydration of bauxite beneficiation products in order to solve the problem of bauxite beneficiation. Settlement of products, saving water resources, reducing environmental pollution and safety risks caused by tailings stacking, and reducing production costs

Method used

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  • Deposition dehydrating method for processing concentrate or tailing by bauxite

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Taking the bauxite beneficiation tailings of Zhongzhou Branch as the test ore sample, the content of -37μm particle size is 90.5%, the content of -20μm size is 75.6%, and the content of -10μm size is 15.3%.

[0021] Add 85-2 flocculant produced by Jiaozuo Baiquan Company to the bauxite beneficiation tailings slurry produced by Zhongzhou Branch with a pH value of 9.5 and a concentration of 12.5%. The tailings are settled, the bottom flow concentration of bauxite beneficiation tailings is increased to 54.6%, and the overflow concentration is 1.5%; the overflow enters another settling tank, and a certain amount of sodium hydroxide is added to make the pH value 11.0, after The supernatant after sedimentation is clear, the content of floating matter is only 0.035g / l, and the return water is well utilized.

Embodiment 2

[0023] Taking the bauxite tailings of Shandong Branch Company as the test ore sample, the content of -37μm particle size is 93.6%, the content of -20μm size is 84.3%, and the content of -10μm size is 45.8%.

[0024] In the bauxite beneficiation tailings slurry with a pH value of 8.9 and a concentration of 9.8%, a polyacrylamide flocculant with a molecular weight of 5 million is added at a dosage of 120g / t, and then the tailings are settled by a settling tank, and the bauxite The underflow concentration of ore dressing tailings is increased to 42.5%, and the overflow concentration is 2.1%; the overflow enters another settling tank, and a certain amount of hydrochloric acid is added to make the pH value 5.8, and the supernatant after settling is clarified and floating The substance content is only 0.018g / l, and the backwater utilization is good.

Embodiment 3

[0026] Taking Guangxi bauxite tailings as the test ore sample, the content of -37μm particle size is 91.2%, the content of -20μm size is 78.3%, and the content of -10μm size is 16.4%.

[0027] In the Guangxi bauxite washing tailings slurry with a pH value of 8.2 and a concentration of 7.1%, add sodium polyacrylate flocculant with an amount of 80g / t, and then use a settling tank to settle the tailings. The concentration of the ore bottom flow is increased to 42.5%, and the overflow concentration is 2.1%. The overflow enters another settling tank, and a certain amount of lime is added to make the pH value 10.8. The supernatant after settlement is clarified, and the content of floating matter is only It is 0.106g / l, and the backwater utilization is good.

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Abstract

The invention relates to a settlement and dehydration method of bauxite concentrate or tailings, and relates to a rapid settlement and high-efficiency dehydration method of concentrate or tailings in the bauxite beneficiation process. It is characterized in that it adopts a two-stage process to settle the concentrate or tailings. First, the first stage of the process is to add flocculant to the concentrate or tailings slurry, and realize the fine ore or tailings particles under the dynamic potential of -100-0mv. rapid flocculation and sedimentation; then in the second stage of the process, an acid or alkaline electrolyte is used to adjust the surface charge and dynamic potential of the fine-grained minerals in the overflow of the first stage of the process, so that the fine particles in the overflow can be electrostatically interacted with the residual flocculant in the solution Under the action, flocs are formed and settle quickly. The method of the present invention is simple, easy to implement, low in cost, and environmentally friendly. The water content of the bauxite beneficiation concentrate or tailings after a stage of flocculant sedimentation is greatly reduced, and the concentration can be increased by 3-10 times at the highest, which is beneficial to the realization of concentrate ore or tailings. Tailings dewatering and reuse.

Description

technical field [0001] The invention relates to a sedimentation and dehydration method of bauxite concentrate or tailings, and relates to a rapid settlement and high-efficiency dehydration method of concentrates and tailings in the bauxite beneficiation process. Background technique [0002] During the beneficiation process of bauxite, the main gangue minerals of bauxite, kaolinite, illite, pyrophyllite, and chlorite, are preferentially dissociated and muddied, resulting in finer particle size of the beneficiation concentrate and tailings, and The content below 37 μm in ore often accounts for more than 50%, and the content of particle size below 37 μm in tailings accounts for more than 90%. In order to quickly settle and filter the concentrate and tailings, efficiently utilize the water in the concentrate and tailings, reduce production costs, and enable the tailings to be safely stockpiled or further efficiently utilized, it is necessary to concentrate and dehydrate a large...

Claims

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Application Information

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IPC IPC(8): B03D3/06B03B1/00
Inventor 陈湘清胡秋云陈兴华
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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