Method for separating and recovering valuable metal from material containing copper, indium, gallium and selenium

A copper indium gallium selenide, separation and recovery technology, which is applied in the field of separation and recovery of valuable metals, can solve the problems of difficult operation of separation of gallium, complicated process flow, serious corrosion of sulfation roasting equipment, etc.

Inactive Publication Date: 2021-02-19
FIRST RARE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the metal leaching rate of this method is not high. At the same time, SLM liquid membrane technology is difficult to separate gallium. The production process is complicated and the cost is high, so it is not suitable for large-scale production.
[0006] Chinese patent application CN105886767A first acidifies and roasts the selenium in the CIGS waste to volatilize, and then separates the remaining three metals, especially the gallium-containing lye produced in the indium separation step and the gallium-containing solution obtained in the gallium separation step Merge treatment is carried out, and the residual electrolytic solution can be returned to the gallium-containing solution to be electrolytically deposited for cyclic electrolytic deposition. The process is relatively complicated, and the sulfation roasting equipment is severely corroded.
However, the process is long and the recovery rate of selenium is low, which cannot solve the recovery problem of gallium.
[0008] Chinese patent CN 106987719 B first acidifies and roasts selenium in CIGS waste to volatilize, then extracts and separates copper, and separates gallium and indium by adjusting the pH. This method realizes the separation and recovery of copper indium gallium selenium, but there is also a high risk of environmental pollution , Sulfation roasting equipment serious corrosion and other problems
[0009] To sum up, it can be seen that the recovery method of copper indium gallium selenide waste in the prior art has problems such as low comprehensive recovery rate, incomplete separation, complicated and dangerous operation, high production cost, and large environmental pollution. It is urgent to invent a method that can solve the above problems. A method for separating and recovering valuable metals from copper indium gallium selenide materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for separating and recovering valuable metals from copper indium gallium selenide materials, comprising the following steps: crushing copper indium gallium selenide materials (CIGS material components Cu 15%, In 15%, Ga 15%, Se 55%), ball milling Pass through a 100-mesh sieve to obtain the material under the 100-mesh sieve, mix 100g of the under-screen material with 500g of water evenly to form the first mixed solution; add 28g of sodium chlorate to the first mixed solution, heat up to 50~60°C, Slowly add 230g of 32% concentrated hydrochloric acid dropwise again, the solution terminal potential is 400 ~ 450mv to form the second mixed solution, the second mixed solution is filtered to obtain the first solution and thick selenium; the thick selenium is washed with 2% dilute hydrochloric acid, after washing Filtrate to obtain 54.5g of 2N selenium; add 16.5g of zinc powder to the first solution to replace copper to obtain the third mixed solution, filter the third m...

Embodiment 2

[0034]A method for separating and recovering valuable metals from copper indium gallium selenide materials, comprising the following steps: crushing copper indium gallium selenide materials (CIGS material components Cu 15%, In 15%, Ga 15%, Se 55%), ball milling Pass through a 100-mesh sieve to obtain the material under the 100-mesh sieve, mix 600g of the under-screen material with 3600g of water evenly to form the first mixed solution; add 176g of sodium chlorate to the first mixed solution, heat up to 60~70°C, Then slowly add 1500g of 33% concentrated hydrochloric acid dropwise to form the second mixed solution, the solution terminal potential is 480 ~ 530mv, the second mixed solution is filtered to obtain the first solution and thick selenium; the thick selenium is washed with 3% dilute hydrochloric acid, after washing Filtrate to obtain 327g of 2N selenium; add 101g of zinc powder to the first solution to replace copper to obtain the third mixed solution, filter the third mi...

Embodiment 3

[0037] A method for separating and recovering valuable metals from copper indium gallium selenide materials, comprising the following steps: crushing copper indium gallium selenide materials (CIGS material components Cu 15%, In 15%, Ga 15%, Se 55%), ball milling Pass through a 100-mesh sieve to obtain the material under the 100-mesh sieve, mix 10kg of the under-screen material with 75kg of water evenly to form the first mixed solution; add 3kg of sodium chlorate to the first mixed solution, and heat up to 70~80°C. Then slowly add 27kg of 33% concentrated hydrochloric acid dropwise to form the second mixed solution, the solution terminal potential is 590 ~ 630mv, the second mixed solution is filtered to obtain the first solution and thick selenium; the thick selenium is washed with 4% dilute hydrochloric acid, after washing Filtrate to obtain 5.39kg of 3N selenium; add 1.7kg of zinc powder to the first solution to replace copper to obtain the third mixed solution, filter the thi...

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PUM

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Abstract

The invention relates to a method for separating and recovering valuable metal from a material containing copper, indium, gallium and selenium. The method mainly comprises the steps that hydrochloricacid and sodium chlorate are adopted for controlling potential leaching to obtain crude selenium, zinc powder is added into leachate for replacement to obtain spongy copper, zinc powder continues to be added for replacement to obtain spongy indium, a solution obtained after replacement is neutralized, and then 4N gallium is obtained through liquid preparation electrolysis. The method for separating and recovering the valuable metal from the material containing copper, indium, gallium and selenium is easy to carry out, efficient, short in process, high in recovery rate, free of toxic hydrogen selenide gas and environmentally friendly.

Description

technical field [0001] The invention relates to the field of resource recovery, in particular to a method for separating and recovering valuable metals from copper indium gallium selenide materials. Background technique [0002] Copper indium gallium selenide thin film solar cells have many advantages and are favored by the market. It is the biggest hotspot in the research and development, scale production and application of thin film solar cells in recent years. The absorption layer of copper indium gallium selenium solar cells is composed of copper, indium, gallium, and selenium in an optimal ratio to form a chalcopyrite structure, which can absorb a wide range of spectral wavelengths, except for the visible spectral range where amorphous silicon solar cells can absorb light , and can also cover the near-infrared region with a wavelength between 700 and 2000nm, that is, the longest power generation time in a day. Compared with crystalline silicon solar cells of the same wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B58/00C01B19/02
CPCC22B7/007C22B7/006C22B15/0091C22B58/00C01B19/02Y02P10/20
Inventor 石静儒殷亮李如旭朱刘
Owner FIRST RARE MATERIALS CO LTD
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