Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Recycling method for copper indium gallium selenide (CIGS) waste

A copper indium gallium selenide and recovery method technology, which is applied in the field of metal-nonmetal mixed waste recycling, can solve the problems of large environmental pollution, incomplete, complex and dangerous operations, etc., and achieve high environmental friendliness, easy large-scale production, and broad The effect of applying the foreground

Active Publication Date: 2016-08-24
HANERGY MOBILE ENERGY HLDG GRP CO LTD
View PDF5 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technical solution faces the same problems of environmental pollution and operational danger as the aforementioned Chinese patent 102296178A. In addition, reducing selenium with sodium sulfite in an acidic environment is likely to produce chlorine dioxide gas, which is harmful to the human body and the reduction is not complete, resulting in the recovery rate of selenium. low, and the residual selenium will affect the subsequent recovery of indium and gallium, all of which show that the separation strategy of the patented method is not very reasonable
[0007] To sum up, there are problems such as low comprehensive recovery rate, incomplete separation, complicated and dangerous operation, high production cost, and large environmental pollution in the recycling method of copper indium gallium selenium waste in the prior art. It is urgent to invent a method that can solve the above problems. CIGS Waste Recycling Methods

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Recycling method for copper indium gallium selenide (CIGS) waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Follow the steps below to recycle copper indium gallium selenide waste:

[0048] a. Milling: Crushing copper indium gallium selenide waste into powder with a particle size of 70-90 mesh;

[0049] b. Separation of selenium: add concentrated sulfuric acid to the powder and stir evenly, wherein the consumption of concentrated sulfuric acid is based on the basic requirement that the powder can be completely dissolved. Preferably, the mass ratio of the concentrated sulfuric acid to the powder is (1.0~1.8): 1, Then roast under negative pressure and 320°C. The specific pressure of roasting is based on the basic requirement of controlling the roasting furnace not to emit smoke, so as to obtain CuSO 4 、In 2 (SO 4 ) 3 , Ga 2 (SO 4 ) 3 Mixed sulfate and volatile SeO 2 gas, then Na 2 SO 3 solution to reduce the SeO 2 The gas gets crude selenium;

[0050] c. Dissolving: heating and dissolving the mixed sulfate with water to obtain a solution with an indium ion concentrati...

Embodiment 2

[0056] Follow the steps below to recycle copper indium gallium selenide waste:

[0057] a. Milling: Crushing copper indium gallium selenide waste into powder with a particle size of 70-90 mesh;

[0058] b. Separation of selenium: add concentrated sulfuric acid to the powder and stir evenly, wherein the consumption of concentrated sulfuric acid is based on the basic requirement that the powder can be completely dissolved. Preferably, the mass ratio of the concentrated sulfuric acid to the powder is (1.0~1.8): 1, Roasting at negative pressure and 400 ° C, the specific pressure of the roasting is based on the basic requirement of controlling the roasting furnace not to emit smoke, and CuSO 4 、In 2 (SO 4 ) 3 , Ga 2 (SO 4 ) 3 Mixed sulfate and volatile SeO 2 gas, then Na 2 SO 3 solution to reduce the SeO 2 The gas gets crude selenium;

[0059] c. Dissolving: heating and dissolving the mixed sulfate with water to obtain a solution with an indium ion concentration of 3 to ...

Embodiment 3

[0065] Follow the steps below to recycle copper indium gallium selenide waste:

[0066] a. Milling: Crushing copper indium gallium selenide waste into powder with a particle size of 70-90 mesh;

[0067] b. Separation of selenium: add concentrated sulfuric acid to the powder and stir evenly, wherein the consumption of concentrated sulfuric acid is based on the basic requirement that the powder can be completely dissolved. Preferably, the mass ratio of the concentrated sulfuric acid to the powder is (1.0~1.8): 1, Roasting under negative pressure and 500 ° C, the specific pressure of the roasting is based on the basic requirement of controlling the roasting furnace not to emit smoke, and CuSO 4 、In 2 (SO 4 ) 3 , Ga 2 (SO 4 ) 3 Mixed sulfate and volatile SeO 2 gas, then Na 2 SO 3 solution to reduce the SeO 2 The gas gets crude selenium;

[0068] c. Dissolving: heating and dissolving the mixed sulfate with water to obtain a solution with an indium ion concentration of 3 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a recycling method for copper indium gallium selenide (CIGS) waste. The recycling method comprises the steps that selenium in the CIGS waste is subjected to acidifying, roasting and volatilizing at first, SeO2 gas is reduced through a sodium sulfite solution, and crude selenium is obtained to achieve advance separation of the selenium, so that the problem that the selenium is always difficult to separate in the industry is solved; and then, the rest of three kinds of metal are separated, particularly, gallium-containing alkali liquor produced in the indium separation process and a gallium-containing solution obtained in the gallium separation process are combined, and electrodepositing residual liquor can be returned to the to-be-electrodeposited gallium-containing solution to be subjected to circulatory electrodepositing, so that efficient and circulatory recycling of gallium is achieved. According to the recycling scheme of the recycling method for the CIGS waste, the comprehensive recycling rate of the various materials is much higher than the existing level in the same industry; in addition, production wastewater zero discharge can be achieved in the whole recycling process, and the environment-friendly degree is high; and moreover, the whole recycling process is easy to operate, high in safety and reliability, low in cost and capable of achieving large-scale production easily and has broad application prospects.

Description

technical field [0001] The invention relates to the field of metal-nonmetal mixed waste recycling, in particular to a method for recycling copper indium gallium selenide (CIGS) waste. Background technique [0002] Copper indium gallium selenide (CIGS for short) solar thin film battery has the characteristics of low cost, convenient installation and wide application range, and its application prospect is very broad. In the process of producing CIGS batteries, a large amount of copper indium gallium selenide (CIGS for short) waste will be produced, such as CIGS targets that cannot be fully utilized, defective CIGS batteries, etc.; at the same time, with the widespread use of CIGS batteries, they are also facing scrapping The issue of recycling of CIGS battery components. [0003] CIGS waste mainly contains copper, indium, gallium, and selenium, which are all valuable materials. Among them, indium, gallium, and selenium are important strategic resources, and copper is an urgen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C01B19/02C22B58/00C22B15/00
CPCY02P10/20
Inventor 张发杨武斌
Owner HANERGY MOBILE ENERGY HLDG GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com