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Method for recovering valuable metals from waste copper indium gallium selenide battery chips

A technology of copper indium gallium selenide and valuable metals, which is applied in the field of secondary utilization of resources, can solve problems such as low comprehensive recovery rate, complicated and dangerous operation, and large environmental pollution, and achieve high recovery rate, environmental friendliness, and complete separation effect

Active Publication Date: 2019-10-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0007] To sum up, it can be seen that there are problems such as low comprehensive recovery rate, incomplete separation, complicated and dangerous operation, high production cost, and large environmental pollution in the existing copper indium gallium selenium waste recycling method. It is urgent to invent a CIGS that can solve the above problems. Waste Chip Recycling Method

Method used

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  • Method for recovering valuable metals from waste copper indium gallium selenide battery chips

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Experimental program
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Effect test

Embodiment 1

[0044] Such as figure 1 As shown, the implementation steps of this embodiment include: taking 50g of CIGS waste battery chips and peeling off the substrate; after the peeled valuable metal layer is sulfuric acid of 500kg / t-waste, carry out sulfuration roasting, the roasting temperature is 200 ° C, The roasting time is 3 hours to obtain crude selenium and slag; the slag is soaked in water, the water immersion temperature is 95°C, the leaching time is 5h, the liquid-solid ratio is 10:1ml / g, the stirring speed is 400rpm, and the water immersion solution is obtained after water immersion and filtration and water leaching slag; water leaching liquid first removes impurities / separation, filters out slag containing zinc, cadmium, aluminum, and the filtrate is recrystallized to obtain copper sulfate; water leaching slag uses a mass concentration of 80% NaOH solution as the leaching agent at normal pressure Under the conditions of alkaline leaching, the leaching temperature of the alka...

Embodiment 2

[0046]The implementation steps of this embodiment include: taking 100g of CIGS waste battery chips and peeling off the substrate; adding 700kg / t-scrap sulfuric acid to the peeled valuable metal layer, and then performing sulfuration roasting, the roasting temperature is 700°C, and the roasting time is 700°C. 0.5h to obtain crude selenium and slag; the slag is soaked in water, the water immersion temperature is 20 ℃, the leaching time is 5h, the liquid-solid ratio is 1:1ml / g, the stirring speed is 200rpm, and the water immersion liquid and Water leaching slag; the water leaching liquid is firstly cleaned of impurities / separation, and the slag containing zinc, cadmium, and aluminum is filtered out, and the filtrate is recrystallized to obtain copper sulfate; The leaching temperature during the leaching process is 30°C, the leaching time is 4.5 hours, and the solid-to-liquid ratio before leaching is 1:5g / mL. After leaching, the alkali leaching solution and alkali leaching residue ...

Embodiment 3

[0048] The implementation steps of this embodiment include: taking 50g of CIGS waste battery chips and peeling off the substrate; adding 100kg / t-scrap of sulfuric acid to the peeled valuable metal layer, and then carrying out sulfuration roasting, the roasting temperature is 500°C, and the roasting time is 500°C. for 3.5h to obtain crude selenium and slag; the slag was soaked in water at a temperature of 70°C for 0.5h, the liquid-solid ratio was 5:1ml / g, and the stirring speed was 600rpm. and water leaching slag; water leaching liquid first removes impurities / separation, filters out slag containing zinc, cadmium, aluminum, and the filtrate is recrystallized to obtain copper sulfate; water leaching slag uses a mass concentration of 50% NaOH solution as the leaching agent at normal pressure Under the conditions of alkaline leaching, the leaching temperature of the alkaline leaching process is 90°C, the leaching time is 3 hours, the solid-liquid ratio before leaching is 1:5g / mL, a...

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Abstract

The invention provides a method for recovering valuable metals from a copper indium gallium selenide waste battery chip, and belongs to the technical field of resource secondary utilization. The method comprises the steps that the copper indium gallium selenide (CIGS) waste battery chip is subjected to substrate stripping; crude selenium and slag are obtained by sulfurating and roasting a valuablemetal layer after stripping; a water leaching solution and water leaching slag are obtained after leaching of slag water; slag containing zinc, cadmium and aluminum and filtrate are obtained after the water leaching solution is subjected to impurity removing / separation, and copper sulfate is obtained by the crystallization of the filtrate; an alkali leaching solution and alkali leaching slag areobtained after the water leaching slag is subjected to alkali leaching; an acidic leaching solution and acidic leaching slag are obtained after the alkali leaching solution is subjected to acidic leaching, the acidic leaching slag is returned to be subjected to sulfatizing roasting; crude indium is obtained by reducing the acidic leaching solution, and slag containing aluminum and tin and high purity indium are obtained by the purification of the crude indium; slag containing molybdenum and tin is obtained by separating the alkali leaching solution, and filtrate is obtained by filtration; andthick gallium is obtained by electrolyzing the filtrate, and high purity gallium is obtained by purifying the thick gallium. According to the method for recovering the valuable metals from the copperindium gallium selenide waste battery chip, efficient selective leaching of copper, indium, gallium and selenide can be realized, and good application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of resource secondary utilization, in particular to a method for recovering valuable metals from copper indium gallium selenium waste battery chips. Background technique [0002] Copper indium gallium selenide (CIGS) thin-film solar cells have high photoelectric efficiency and have good development potential. Its production methods include vacuum sputtering method, distillation method and non-vacuum coating method. No matter which production method is used, some copper indium gallium selenide waste will be generated during the production process. From the perspective of green economy, environmental protection and sustainable development, in order to facilitate the sustainable utilization of rare metals such as indium, gallium and selenium, and heavy metal copper, it is necessary to separate them and recycle them separately to facilitate further recycling and ensure that copper indium Sustainable development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B1/06C22B15/00C22B58/00C01B19/02C25C1/22
CPCC01B19/02C22B1/06C22B7/006C22B15/0065C22B58/00C25C1/22Y02P10/20
Inventor 马保中王成彦陈永强邵爽邢鹏
Owner UNIV OF SCI & TECH BEIJING
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