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Recycling method for copper-indium-gallium-selenium materials

A technology of copper indium gallium selenide and recovery method, which is applied to chemical instruments and methods, gallium/indium/thallium compounds, element selenium/tellurium, etc., can solve the problems of volatile hydrochloric acid, high production cost, and reduced gallium recovery rate, etc. Achieve the effect of reducing acid gas pollution, solving the problem of co-extraction, and achieving good separation effect

Active Publication Date: 2017-07-28
HANERGY MOBILE ENERGY HLDG GRP CO LTD
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Problems solved by technology

[0007] In the above-mentioned prior art techniques, the use of hydrochloric acid and hydrogen peroxide leaching will consume a large amount of oxidant, and hydrochloric acid is volatile, and it is an exothermic reaction in the leaching reaction process, causing a large amount of hydrochloric acid to volatilize, and the pollution is relatively serious
At the same time, the extraction agent used in the extraction of indium produces co-extraction of gallium, which makes it difficult to separate indium and gallium, thereby reducing the recovery rate of gallium.
On the other hand, the processing method of replacing copper with indium is too expensive to produce.

Method used

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  • Recycling method for copper-indium-gallium-selenium materials

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Embodiment Construction

[0044] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0045] In step A, 400g of copper indium gallium selenide material is placed in a ball mill, ball milled to a powder below 120 mesh, and dried at 100° C. for 4 hours.

[0046] Step B: Mix the powder obtained in step A with 98% concentrated sulfuric acid and mix well. The liquid-solid ratio is 1:1. After roasting to 750°C, start blowing in air, absorb it with a secondary suction filter bottle, and roast for 6 hours.

[0047] Step C, detecting the selenium content in the calcined slag, if it exceeds a predetermined value, carry out secondary re-burning. Dissolve the final remaining calcined slag directly in 10% dilute sulfuric acid, and stir at room temperature for 30 minutes.

[0048] Step D, after dissolving and filtering, add 8mol / L sodium hydroxide solution to adjust the pH value to 1.8, then extract copper, use AD-100N as the extractant, dilute to...

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Abstract

The invention discloses a recycling method for copper-indium-gallium-selenium materials. The recycling method mainly comprises the steps of performing sulfurization roasting, performing acid dissolution, extracting and electrolyzing metal copper, producing gallium hydroxide precipitates, replacing indium and the like. According to the recycling method for the copper-indium-gallium-selenium materials disclosed by the invention, sulfurization roasting is adopted to remove selenium, and roasted residual slag is oxidation slag which can be directly subjected to acid dissolution, so that acid gas pollution is reduced; a copper extracting agent is adopted to extract copper, so that the separating effect is good and cost is low, and extracted copper is directly electrolyzed to obtain high-purity metal copper; on the other hand, alkali gallium separation is adopted, so that indium-gallium separation can be realized by only needing to regulate the pH value of the solution, and therefore, the co-extraction problem during extraction and separation of indium and gallium is solved, and the separating effect is good; and the obtained indium and gallium products are relatively high in purity.

Description

technical field [0001] The invention relates to a method for recycling copper indium gallium selenide photovoltaic components, in particular to a method for recycling 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/06C22B15/00C22B58/00C01B19/02C25C1/12
CPCC01B19/02C22B1/06C22B7/007C22B15/0071C22B58/00C25C1/12C22B3/26Y02P10/20C22B7/005C22B3/30C22B7/00C22B15/00C01G15/00
Inventor 高永涛刘军飞王冠吴国发彭侃
Owner HANERGY MOBILE ENERGY HLDG GRP CO LTD
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