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Recombination structure and structure separating and purifying method

A technology for separation, purification and separation equipment, which is applied in the direction of separating sediment, alumina/aluminum hydroxide by centrifugal force, etc., can solve the problems of low effective utilization rate of circulating mother liquor, less than 2% increase in decomposition rate, and low decomposition rate, etc. Achieve the effect of increasing the efficiency of one cycle, improving production efficiency and improving yield

Inactive Publication Date: 2018-10-12
黄铭 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the effective utilization rate of the circulating mother liquor in the alumina production process is low, the decomposition rate is low, between 48% and 52%, and the yield is low
For more than 100 years, countries around the world have been continuously researching, but the decomposition rate has increased by less than 2% so far

Method used

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  • Recombination structure and structure separating and purifying method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The first step: take the mother liquor of the seed fraction to be separated for analysis and detection, the obtained ak value is 3.5, the content of sodium oxide in the solution is 160 g / kg, and the content of aluminum oxide is 75.2 g / kg. According to the quantitative configuration scheme of the structure ratio, to separate the solution of 1000g of the liquid to be separated, it is necessary to reduce the moisture of 298g;

[0032]Step 2: Concentrate 1000g of the solution to be separated to reduce 298g of water, and then use ultrasound and stirring for 60 minutes to induce the self-assembly process of the structural reorganization at a temperature of 90 degrees to complete the reorganization of its structure;

[0033] The third step: the above-mentioned relatively stable solution that has completed the self-assembly process is separated at 90 degrees by a tunnel separation device with a rotating speed of 8000 rpm for 10 minutes, and the separation is repeated 4 times to ...

Embodiment 2

[0035] The first step: take the high-sodium liquid in the process of producing alumina to be separated for analysis and detection, and the obtained ak value is 11, the content of sodium oxide in the solution is 300 g / kg, and the content of alumina is 45 g / kg. By calculating The quantitative configuration scheme of the three structural ratios of sodium, aluminum and water, to separate the solution of 1000g of the liquid to be separated, it is necessary to add 100g of water;

[0036] The second step: add 100g of water to 1000g of the solution to be separated, and then use ultrasound and stirring for 60 minutes to induce the self-assembly process of the structural reorganization at a temperature of 80 degrees to complete the reorganization of its structure;

[0037] The third step: the above solution that has completed the self-assembly process is separated for 20 minutes through a tunnel separation device with a rotating speed of 2000 rpm at 80 degrees. After repeated separation ...

Embodiment 3

[0039] The first step: take the high-sodium liquid in the process of producing alumina to be separated for analysis and detection, and the obtained ak value is 11, the content of sodium oxide in the solution is 300 g / kg, and the content of alumina is 45 g / kg. By calculating The quantitative configuration scheme of the three structural ratios of sodium, aluminum and water, to separate the solution of 1000g of the liquid to be separated, it is necessary to add 100g of water;

[0040] Step 2: Add 100g of water to 1000g of the solution to be separated, and then use ultrasound and stirring for 60 minutes to induce the self-assembly process of the structural reorganization at a temperature of -5 degrees to complete the reorganization of its structure;

[0041] The third step: the above solution that has completed the self-assembly process is separated by a conventional centrifuge separation device at -5 degrees at a speed of 1000 rpm tunnel separation device for 30 minutes. After sep...

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Abstract

The invention relates to a recombination structure and a structure separating and purifying method, which can solve the problem of low effective utilization rate of circulating mother liquid in the aluminum oxide production process. The structure separating and purifying method comprises the following main technological steps of (1) selecting to-be-separated liquid, analyzing and detecting the contents of sodium and aluminum by a conventional chemical titration detection method in the aluminum production process, obtaining the values a and k, and calculating and determining a quantitative preparation scheme of the ratio of sodium, aluminum and water structures; (2) concentrating the solution to reduce water, or adding water, inducing the self-assembly process for the recombination of the structure, and completing the recombination of the structure; (3) enabling the solution after self-assembly process to pass through the separating equipment, so as to obtain a high-sodium solution anda high-aluminum solution.

Description

technical field [0001] The invention relates to the field of typical separation and purification, and relates to a production and separation process for separating high-sodium and high-alumina solutions from a solution in the production of alumina by a Bayer process; it relates to the separation of substances in seawater, separation of heavy metals in sewage, and other separation fields. Background technique [0002] The production of alumina by the Bayer process was established in 1887 by the Bayer process and is widely used in the production of alumina from bauxite. So far, more than 90% of alumina products are derived from the Bayer process. Its advantages are: simple process, low energy consumption, good product quality, and relatively less pollution. It is currently the most environmentally friendly production method. Its disadvantages are: the effective utilization rate of the circulating mother liquor in the alumina production process is low, the decomposition rate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02B01D21/26
CPCB01D21/26C01F7/02
Inventor 黄铭
Owner 黄铭
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