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A new process for extracting gallium from Bayer mother liquor with chelating resin

A chelating resin and new process technology, applied in the field of gallium extraction, can solve the problems of resin gallium absorption capacity reduction, temperature rise, etc., and achieve the effect of eliminating the phenomenon of sharp temperature rise

Active Publication Date: 2011-12-14
SUNRESIN NEW METERIALS CO LTD XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the rinsing and transformation process, there will also be a replacement process between water and alkaline solution or alkaline solution and water. The change in concentration gradient will cause a short-term sharp rise in temperature, which will cause a decrease in the gallium absorption capacity of the resin.

Method used

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  • A new process for extracting gallium from Bayer mother liquor with chelating resin
  • A new process for extracting gallium from Bayer mother liquor with chelating resin
  • A new process for extracting gallium from Bayer mother liquor with chelating resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Under the same operating conditions, water and sodium hydroxide solution were used as media respectively to investigate the temperature change and resin adsorption capacity during each process.

[0020] Using water as the medium, the temperature changes during each process are as follows (wherein the temperature of entering the tower and the temperature of leaving the tower take the average value of the detection data in the whole process, and the following examples are all the same):

[0021] (1) Saturated washing: The resin volume of the saturated washing tower is 5m 3 , with a velocity of 2m 3 / h, the processing time is 2h. The solution entering the tower is water, the temperature of the water entering the tower is 23°C, and the temperature of the liquid exiting the tower is 34°C;

[0022] (2) Rinsing: The resin volume of the rinsing tower is 5m 3 , with a velocity of 2m 3 / h, the processing time is 2h. The solution entering the tower is water, the temperature o...

Embodiment 2

[0038] Under the same operating conditions, water and potassium hydroxide solution were used as media respectively to investigate the temperature change and resin adsorption capacity of each process.

[0039] Using water as the medium, the temperature changes during each process are as follows:

[0040] (1) Saturated washing: The resin volume of the saturated washing tower is 5m 3 , with a velocity of 2.5m 3 / h, the processing time is 2h. The solution entering the tower is water, the temperature of the water entering the tower is 21°C, and the temperature of the liquid exiting the tower is 35°C;

[0041] (2) Rinsing: The resin volume of the rinsing tower is 5m 3 , with a velocity of 2.5m 3 / h, the processing time is 2h. The solution entering the tower is water, the temperature of the water entering the tower is 23°C, and the temperature of the liquid exiting the tower is 36°C;

[0042] (3) Rinse: The resin volume of the single tower of the eluent tower is 5m 3 , with a ...

Embodiment 3

[0057] Under the same operating conditions, water and ammonia solution were used as media respectively to investigate the temperature change and resin adsorption capacity during each process.

[0058] Using water as the medium, the temperature changes during each process are as follows:

[0059] (1) Saturated washing: The resin volume of the saturated washing tower is 5m 3 , with a velocity of 2m 3 / h, the processing time is 2h. The solution entering the tower is water, the temperature of the water entering the tower is 21°C, and the temperature of the liquid exiting the tower is 33°C;

[0060] (2) Rinsing: The resin volume of the rinsing tower is 5m 3 , with a velocity of 2m 3 / h, the processing time is 2h. The solution entering the tower is water, the temperature of the water entering the tower is 21°C, and the temperature of the liquid exiting the tower is 38°C;

[0061] (3) Rinse: The resin volume of the single tower of the eluent tower is 5m 3 , with a velocity of ...

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Abstract

The invention discloses a novel process for extracting gallium from Bayer mother solution by using a chelating resin, which comprises the following steps: (1) fully washing, namely filling 6.5 to 2.5N of alkaline solution into a fully washing tower in a concentration gradient decrease manner to fully wash a saturated resin, and returning the effluent into an aluminum oxide plant; (2) rinsing, namely filling alkaline solution which has the same alkali concentration as an eluent into a rinsing tower for rinsing, filtering the effluent to remove suspended matters, recovering the effluent for preparing the eluent; and (3) performing transformation, namely filling 2.5 to 6N of alkaline solution into a transformation tower in a concentration gradient decrease manner to perform the transformation treatment of the resin, recovering part of the effluent to prepare eluent and recovering part of the effluent for use in transformation treatment in next period. When the novel process disclosed by the invention is used, the rises of the temperatures in the towers in the steps for extracting gallium by using chelating resin can be reduced obviously, the attenuation of the performance of the resin can be reduced, and the service life of the resin can be prolonged.

Description

technical field [0001] The invention relates to a process for extracting gallium from Bayer mother liquor by using chelating resin, which belongs to the field of hydrometallurgy. Background technique [0002] Gallium is a rare metal that plays an important role in the semiconductor industry, and the demand for gallium metal continues to increase year after year. However, sources of gallium metal are scarce, and most of its products come from by-products such as the aluminum industry. Bauxite usually contains 0.002-0.008% gallium metal. During the production of alumina by the Bayer process, about 70% of the gallium metal in the bauxite is leached together with the alumina, and about 30% remains in the red mud. With the circulation of the mother liquor, the concentration of gallium metal in the mother liquor of the Bayer process can accumulate to 100-300ppm. [0003] The process of extracting metal gallium with chelating resin has become the main way to extract gallium from...

Claims

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Application Information

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IPC IPC(8): C22B3/24C22B58/00
CPCY02P10/20
Inventor 寇晓康王刚刘琼李岁党
Owner SUNRESIN NEW METERIALS CO LTD XIAN
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