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Method for recovering selenium from Cu-In-Ga-Se waste

A copper indium gallium selenium and selenium recovery technology, applied in the direction of element selenium/tellurium, etc., can solve the problems of high cost, difficult control of electrode results, and high anti-corrosion requirements

Pending Publication Date: 2020-07-07
DONGJUN NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former electrolysis method has the problem that the electrode results are difficult to control, and the latter method needs to use acidic or alkaline solution to leach waste, which requires high anti-corrosion requirements for the overall equipment and high cost

Method used

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  • Method for recovering selenium from Cu-In-Ga-Se waste
  • Method for recovering selenium from Cu-In-Ga-Se waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The method for recovering selenium from copper indium gallium selenide waste provided by the embodiment of the present invention comprises the following steps:

[0050] Step A1: Add 1 kg of CIGS material to 6 L of 100 g / L sulfite solution to obtain a mixed solution of CIGS material and sulfite solution.

[0051] Step A2: Put the mixed solution into a pressure leaching kettle, close the leaching kettle, keep the pressure in the leaching kettle at 0.6 MPa, and keep the temperature at 180° C., and leaching for 5 hours.

[0052] Step A3: Use a solid-liquid separation device to filter out the copper indium gallium residue in the leaching tank to obtain a sodium selenosulfate leaching solution.

[0053] Among them, after the copper indium gallium residue is obtained, other methods can be used to recycle the copper indium gallium residue, and the copper, indium, and gallium in it can be recovered.

[0054] Step A4: adding an appropriate amount of hydrochloric acid to the leac...

Embodiment 2

[0058] The method for recovering selenium from copper indium gallium selenide waste provided by the embodiment of the present invention comprises the following steps:

[0059] Step B1: using a ball mill to crush the CIGS waste to obtain granular CIGS materials.

[0060] Step B2: adding an appropriate amount of copper indium gallium selenide material to 8L of 160g / L sulfite solution, the liquid-solid ratio of the sulfite solution to the copper indium gallium selenide material is 15:1, and the copper indium gallium selenide material is obtained and a mixed solution of sulfurous acid.

[0061] Step B3: Put the mixed solution into a pressure leaching kettle, close the leaching kettle, keep the pressure in the leaching kettle at 0.8 MPa, and keep the temperature at 170° C., and leaching for 4 hours.

[0062] Step B4: Use a solid-liquid separation device to filter out the copper indium gallium residue in the leaching tank to obtain a sodium selenosulfate leaching solution.

[0063...

Embodiment 3

[0068] The method for recovering selenium from copper indium gallium selenide waste provided by the embodiment of the present invention comprises the following steps:

[0069] Step C1: using a ball mill to crush the CIGS waste to obtain 2 kg of granular CIGS material.

[0070] Step C2: adding 2 kg of copper indium gallium selenide material into 10 L of 150 g / L sulfite solution to obtain a mixed solution of copper indium gallium selenide material and sulfite solution.

[0071] Step C3: Put the mixed solution into a pressure leaching kettle, close the leaching kettle, keep the pressure in the leaching kettle at 1 MPa, and keep the temperature at 190° C., and leaching for 2 hours.

[0072] Step C4: Use a solid-liquid separation device to filter out the copper indium gallium residue in the leaching tank to obtain a sodium selenosulfate leaching solution.

[0073] Among them, after the copper indium gallium residue is obtained, other methods can be used to recycle the copper indiu...

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Abstract

The invention provides a method for recovering selenium from Cu-In-Ga-Se waste, which comprises the following steps: adding a Cu-In-Ga-Se material into a sulfite solution to obtain a mixed solution; carrying out leaching treatment on the mixed solution in a pressurized environment, thereby obtaining the leachate obtained after leaching treatment; and adding an acid solution into the leachate for acidification decomposition, and then performing solid-liquid separation to obtain crude selenium. According to the method for recycling selenium from the copper-indium-gallium-selenium waste, sulfitewith mild properties serves as a leaching agent, leaching treatment is conducted on the copper-indium-gallium-selenium material in a pressurized environment, the requirement for corrosion prevention of equipment is low, the leaching time efficiency and the leaching rate of selenium can be guaranteed, and acid-base balance treatment is not needed subsequently; in the invention, selenium separationcan be achieved through the two steps of leaching and acidification precipitation, so that the process is short, the selenium separation efficiency is high, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of solid waste recovery, in particular to a method for recovering selenium from copper indium gallium selenide waste. Background technique [0002] CIGS (copper indium gallium selenide) thin-film solar power generation cells have the characteristics of lightness, portability, and high energy conversion efficiency, and have attracted widespread attention. There are currently three main methods for its production: vacuum sputtering, distillation, and non-vacuum spraying. No matter which method is used, it is inevitable to produce wastes with high purity copper, indium, gallium and selenium as the main components in the production process. The above four metals are of high value. How to effectively separate and purify them so that they can be reused as raw materials for CIGS battery production or resold as pure metals has great economic and environmental significance. [0003] There are existing methods for r...

Claims

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Application Information

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IPC IPC(8): C01B19/02
CPCC01B19/02
Inventor 李胜春靳冉公黄海辉常耀超潘勇进孙刚
Owner DONGJUN NEW ENERGY CO LTD
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