Clarification method for gallium purification electrolysis waste solution

A technology for electrolytic waste liquid and purification treatment, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc. It can solve problems such as increased alkali consumption in production, complicated process operation, and increased impurity content. Achieve the effect of reducing alkali consumption, simplifying production process and improving production efficiency

Active Publication Date: 2008-05-28
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of operation flow, firstly, the process operation is complicated, secondly, it increases the production alkali consumption, and thirdly, stainless steel plates are often used as electrode materials in the recycling process, which is easy to cause the content of im

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] (1) Mix the electrolyte to be purified with high-purity water at 60°C in a ratio of 2:1, stir evenly and filter to remove the black scum and oxide film in the solution.

[0031] (2) Adjust the filtered filtrate with high-purity water to adjust the Nk118g / L, Ga 3+ 222g / L, keep the solution temperature not lower than 35℃.

[0032] (3) The above-mentioned prepared solution is slowly added to the cylindrical electrolytic tank, the insoluble electrodes are inserted into the cathode and anode regions respectively, and 20-30 g of metal gallium is added to the cathode region.

[0033] (4) Connect the DC power supply and control the cathode current density to 1250A / m 2 , Start electrolysis, and keep the solution temperature at 40~65℃ during the electrolysis process.

[0034] (5) The electrolysis is carried out for 96 hours, the electrode is taken out, and the cathode material is discharged. After the product is washed with water and acid, the impurity content is a...

Example Embodiment

[0036] Example 2

[0037] (1) Mix the electrolyte to be purified with high-purity water at 60°C in a ratio of 2:1, stir evenly and filter to remove the black scum and oxide film in the solution.

[0038] (2) Adjust the filtered filtrate with high-purity water to adjust the Nk128 / L, Ga3+ 222g / L, keep the solution temperature not lower than 35℃.

[0039] (3) The above-mentioned prepared solution is slowly added to the cylindrical electrolytic tank, the insoluble electrodes are inserted into the cathode and anode areas respectively, and 20-30 g of metallic gallium is added to the cathode area.

[0040] (4) Connect the DC power supply and control the cathode current density to 1000A / m 2 , Start electrolysis, and keep the solution temperature at 40~65℃ during the electrolysis process.

[0041] (5) The electrolysis is carried out for 72 hours, the electrode is taken out, and the cathode material is discharged. After the product is washed with water and acid, the impurity content of the ...

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PUM

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Abstract

The invention relates to a purification treatment method for purifying gallium from waste electrolyte, which is characterized in that the treatment process comprises that: the electrolyte is filtered to remove floating slag and passive film of the electrolyte, the electrolyte to be purified is used as an electrolysis medium to electrolyze an insoluble anode, thus precipitating and eliminating impurities and Ga, and the purified electrolyte can be sent back to be reused. On the one hand, the purification and treatment method for purifying gallium from waste electrolyte can purify the electrolyte by electrolyzing the electrolyte, thus recycling the electrolyte, cutting down alkaline consumption and realizing the closed loop circulation of the electrolyte during the purification process of gallium; on the other hand, a specialized electrolyte recovery device needs not to be set up, thus simplifying the production process and improving the production efficiency.

Description

technical field [0001] The invention relates to a purification treatment method for gallium purified electrolytic waste liquid. Background technique [0002] Gallium is a precious rare metal. More than 90% of gallium in the world is extracted in the process of producing alumina, and the remaining 10% of gallium is mainly recovered and regenerated from zinc smelting residues or other impurities. With the rapid development of microelectronics and optoelectronics industries, people pay more and more attention to gallium metal, and the requirements for its purity and stability are getting higher and higher. More than 80% of the gallium consumption in the world is high-purity gallium and ultra-pure gallium, and more than 95% of Ga is used to prepare GaAs or GaN. The terminal markets are mobile phones, digital cameras, LEDs and semiconductor light sources. [0003] High-purity gallium is made of crude gallium as a raw material, which is comprehensively purified by various purific...

Claims

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Application Information

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IPC IPC(8): C02F1/461
Inventor 吴钢江新民刘彩玫黄健全玉郭海峰管督
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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