Method for recovery of selenium from copper anode mud
A copper anode slime and selenium recovery technology, applied in the field of metallurgical technology, can solve the problems of large energy consumption, large environmental pollution, and dispersion of valence metals, and achieve the effect of reducing recycling costs and reducing emissions
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[0012] The present invention will be further described below in combination with specific embodiments.
[0013] A method for reclaiming selenium from copper anode slime, comprising the following steps from a to c:
[0014] a. Gasification: add sulfuric acid to the copper anode slime containing impurities for acid leaching, and then roast the pre-sulfated copper anode slime. The roasting adopts the indirect heating method of the horse boiling furnace. The elemental selenium in the copper anode slime fully reacts with sulfuric acid to form Gaseous selenium dioxide and sulfur dioxide, control the copper anode slime and 98% concentrated sulfuric acid according to the solid-liquid mass ratio of 1:0.7 to 1:1, preferably 1:0.8, control the heating and roasting temperature to 500°C to 600°C, and the roasting time to 7h ~8h, copper anode slime and 98% concentrated sulfuric acid are roasted in a muffle furnace, and the following reactions are mainly produced:
[0015] Se+2H 2 SO 4 ==...
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