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Copper indium gallium diselenide treatment method

A technology of copper indium gallium selenide and a processing method, which is applied in chemical instruments and methods, selenium/tellurium compounds, selenium/tellurium oxysalts, etc., can solve the problems of low valuation coefficient, low added value, single product, etc. Efficiency of process simplicity, reduction and oxidation reduction methods

Inactive Publication Date: 2018-11-27
HANERGY NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selenium extraction product plan is to use sulfur dioxide reduction to obtain crude selenium products, the product is single, and the use of sulfur dioxide reduction process produces sulfur dioxide gas, which has an impact on environmental protection
Most of the products obtained by the existing technology are primary products such as hydrolyzed copper slag, sponge copper, sponge indium, and crude gallium. The price coefficient of selling such products is low, and the added value is low compared with high-purity metal products.

Method used

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  • Copper indium gallium diselenide treatment method
  • Copper indium gallium diselenide treatment method
  • Copper indium gallium diselenide treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] A. Sintering: Mix 3kg of copper indium gallium selenide with 25% sodium carbonate, add water to make a thick slurry, extrude and granulate, dry at 90°C for 2 hours, put it into an electric furnace, and control it at 550°C to feed air Carry out sodium carbonate sintering, sintering for 1 hour and 30 minutes, selenium is converted into sodium selenite, copper indium gallium is converted into the corresponding oxide, and carbon dioxide and sintering material are obtained;

[0100] B. Dissolving: Transfer the sintered material into a 30L leaching tank, leaching with dilute sulfuric acid, the mass fraction of dilute sulfuric acid is 1-5%, and filter to obtain the filtrate and a small amount of insoluble matter. The filtrate contains copper sulfate, gallium sulfate, A mixed solution of indium sulfate and sodium selenite;

[0101] C. Ion exchange method for selenium extraction: the filtrate is passed into the exchange column that the cathode is equipped with 717 strong basic a...

Embodiment 2

[0107]A. Sintering: Mix 1 kg of copper indium gallium selenide with 20% sodium carbonate, add water to make a thick slurry, extrude and granulate, dry at 100°C for 1 hour, put it into an electric furnace, and control it at 450°C to feed air Carry out sodium carbonate sintering, sintering for 1 hour, selenium is converted into sodium selenite, copper indium gallium is converted into corresponding oxides, and a sintered material is obtained;

[0108] B. Dissolving: Transfer the sintered material to a 10L leaching tank, leaching with dilute sulfuric acid with a mass fraction of 1-5%, and filtering to obtain a filtrate and a small amount of insoluble matter. The filtrate contains copper sulfate, gallium sulfate, indium sulfate and A mixed solution of sodium selenate;

[0109] C. Ion exchange method for selenium extraction: the filtrate is passed into the exchange column that the cathode is equipped with D201 strong basic anion exchange resin, and the sodium selenite in the filtrat...

Embodiment 3

[0115] A. Sintering: Mix 5kg of copper indium gallium selenide with 30% sodium carbonate, add water to make a thick slurry, extrude and granulate, dry at 80°C for 2 hours, put it into an electric furnace, and control it at 650°C to feed air Carry out sodium carbonate sintering, sintering for 2 hours, selenium is converted into sodium selenite, copper indium gallium is converted into corresponding oxides, and a sintered material is obtained;

[0116] B. Dissolution: Transfer the sintered material to a 50L leaching tank, leaching with dilute sulfuric acid with a mass fraction of 1-5%, and filtering to obtain a filtrate and a small amount of insoluble matter. The filtrate contains copper sulfate, gallium sulfate, indium sulfate and A mixed solution of sodium selenate;

[0117] C. Ion exchange method for selenium extraction: the filtrate is passed into the exchange column that the cathode is equipped with D301 strong basic anion exchange resin, and the sodium selenite in the filtr...

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Abstract

The application discloses a copper indium gallium diselenide treatment method, comprising the steps of adding sodium carbonate into copper indium gallium diselenide for sintering to obtain carbon dioxide and a sintered material, wherein the sintered material is a mixture of sodium selenite and copper indium gallium oxide; adding sulfuric acid to the sintered material for leaching, and filtering toobtain a mixed solution containing copper sulfate, gallium sulfate, indium sulfate and sodium selenite; subjecting the mixed solution containing copper sulfate, gallium sulfate, indium sulfate and sodium selenite to ion exchange through anion exchange resin to obtain copper indium gallium solution; desorbing the anion exchange resin to obtain high-purity selenium; treating the copper indium gallium solution to obtain copper, indium and gallium. The copper indium gallium waste mainly includes selenides; sodium carbonate sintering is performed to convert copper indium gallium diselenide into anoxide easily soluble in an acid; the consumption of acids and strong antioxidants is reduced.

Description

technical field [0001] The present application relates to a treatment method, in particular to a copper indium gallium selenide treatment method. Background technique [0002] CIGS (copper indium gallium selenide) thin film photovoltaic cell is a new type of solar cell developed in the late 1980s. It has the advantages of low cost, stable performance, light and portable, good light transmission, and strong applicability. CIGS thin-film photovoltaic cells are mainly made of scattered metal materials such as indium, gallium, and selenium. At present, China is the main supplier of raw materials in the global market. The reserves and output of indium and gallium account for more than half of the global market. Scattered metal materials such as indium, gallium, and selenium are rare elements in the earth's crust. The current total output is very low, and they largely rely on the mining of associated basic metals. The mining process has a high environmental burden. These material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/16C22B15/00C22B58/00C01B19/00
CPCC01B19/008C22B1/16C22B7/007C22B15/0071C22B15/0084C22B58/00Y02P10/20
Inventor 潘勇进葛鹏
Owner HANERGY NEW MATERIAL TECH CO LTD
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