Method for recovering copper, indium, gallium and selenium
The technology of a copper indium gallium selenide and a recovery method is applied in the field of non-ferrous metal metallurgy, which can solve the problems of complex process and high cost, and achieve the effect of efficient recovery, simplicity and recovery
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Embodiment 1
[0056] Using 3 kg of CIGS waste as raw material, the composition of the raw material is: 19.8% by weight of copper, 25.4% by weight of indium, 5.7% by weight of gallium, and the balance being selenium.
[0057] 1. CIGS electrolysis steps
[0058] This raw material is put into an indium electrolytic cell, and electrolytic refining is carried out in a hydrochloric acid solution.
[0059] The electrolysis conditions are: the electrolyte is hydrochloric acid solution, the pH is 2.5, and the electrolysis temperature is 35°C.
[0060] As a result, indium is electrodeposited on the cathode side, whereby refined indium can be obtained from CIGS waste. The indium obtained by this method is about 0.76 kg, and the recovery rate of indium reaches 99.94%.
[0061] 2. Gallium separation and recovery steps
[0062] The hydroxide precipitate formed by gallium and the copper-selenium anode slime are leached with hydrochloric acid to obtain hydrochloric acid leaching solution and hydrochlori...
Embodiment 2
[0067] Using 3 kg of CIGS waste as raw material, the composition of the raw material is: 19.8% by weight of copper, 25.4% by weight of indium, 5.7% by weight of gallium, and the balance being selenium.
[0068] 1. CIGS electrolysis steps
[0069] This raw material is put into an indium electrolytic cell, and electrolytic refining is carried out in a sulfuric acid solution.
[0070] The electrolysis conditions are: the electrolyte is a sulfuric acid solution, the pH is 3.0, and the electrolysis temperature is 18°C.
[0071] As a result, indium is electrodeposited on the cathode side, whereby refined indium can be obtained from CIGS waste. The indium obtained by this method is about 0.756 kg, and the recovery rate of indium reaches 99.21%.
[0072] 2. Gallium separation and recovery steps
[0073] The hydroxide precipitate formed by gallium and the copper-selenium anode slime are leached with sulfuric acid to obtain a sulfuric acid leaching solution and a sulfuric acid leachi...
Embodiment 3
[0078] Using 3 kg of CIGS waste as raw material, the composition of the raw material is: 19.8% by weight of copper, 25.4% by weight of indium, 5.7% by weight of gallium, and the balance being selenium.
[0079] 1. CIGS electrolysis steps
[0080] This raw material is put into an indium electrolytic cell, and electrolytic refining is carried out in a hydrochloric acid solution.
[0081] The electrolysis conditions are: the electrolyte is hydrochloric acid solution, the pH is 2.8, and the electrolysis temperature is 25°C.
[0082] As a result, indium is electrodeposited on the cathode side, whereby refined indium can be obtained from CIGS waste. The indium obtained by this method is about 0.758 kg, and the recovery rate of indium reaches 99.48%.
[0083] 2. Gallium separation and recovery steps
[0084] The hydroxide precipitate formed by gallium and the copper-selenium anode slime are leached with sodium hydroxide solution to obtain sodium hydroxide leaching solution and sod...
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