Method of recovering and preparing cuprous oxide by taking waste copper-tungsten alloy as raw material
A technology of copper-tungsten alloy and cuprous oxide is applied in the field of recycling and preparing cuprous oxide, which can solve problems such as increasing production cost, and achieve the effects of easy operation, mild reaction conditions, high yield and purity
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[0020] Example 1
[0021] (1) Take 10g of waste copper-tungsten alloy and use nitric acid with a concentration of 4mol / L to leach copper in the waste copper-tungsten alloy at a time. The nitric acid leaching temperature is 40℃, the leaching time is 6h, and the amount of nitric acid is twice the theoretical amount. Copper nitrate stock solution, the one-time leaching rate is 26.1%;
[0022] (2) Crush the waste copper-tungsten alloy remaining in step (1) into micron-sized powder with a particle size of 50um;
[0023] (3) Take 2g of the waste copper tungsten powder prepared in step (2), the nitric acid concentration is 6mol / L, the nitric acid leaching temperature is 40°C, the nitric acid leaching time is 30min, and the liquid-solid ratio is 1:1 to obtain a copper nitrate solution. The secondary leaching rate reaches 99.8%;
[0024] (4) The process of reducing sodium sulfite to prepare cuprous oxide, the concentration of sodium sulfite is 1mol / L, the concentration of copper nitrate is 0....
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