Treatment method for extracting gold from high-impurity silver anode slime
A technology of silver anode slime and treatment method, which is applied in the fields of non-ferrous metallurgy and precious metal hydrometallurgy, can solve the problems of unattainable gold purity, complicated treatment process, long treatment time, etc., and achieves high reaction efficiency, reliable process and impurity removal rate. high effect
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[0024] Example 1
[0025] The processing method of gold extraction from high-impurity silver anode mud, the specific steps are as follows:
[0026] (1) First, wash 3kg of high-impurity silver anode slime produced by silver electrolysis, including Au 10.7%, Ag, 5.54%, Cu1.13%, Fe2.01%, Pb1.97%, and Sb1.96%. , Si2.17%, liquid-to-solid ratio 3:1, temperature 90℃, stirring time 0.3h, and then filtered to obtain washing residue, and the washing liquid is returned to the silver electrolysis;
[0027] (2) Add the washed residue obtained in step (1) to 68% nitric acid for leaching, liquid-to-solid ratio 2:1, temperature 100℃, reaction time 0.2h, and then filter to obtain nitric acid leaching residue, and nitric acid leaching liquid is returned to the silver system to recover silver And other valuable metals;
[0028] (3) Add the nitric acid leaching residue obtained in step (2) to 98% concentrated sulfuric acid for leaching, with a liquid-to-solid ratio of 2:1, temperature 100°C, reaction ti...
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[0032] Example 2
[0033] The processing method of gold extraction from high-impurity silver anode mud, the specific steps are as follows:
[0034] (1) First, wash 1kg of high-impurity silver anode mud produced by silver electrolysis, including Au11.3%, Ag, 6.12%, Cu1.98%, Fe1.96%, Pb1.55%, Sb2.64% , Si2.02%, liquid-to-solid ratio 2:1, temperature 95℃, stirring time 0.3h, and then filtered to obtain washing residue, and the washing liquid returns to the silver electrolysis;
[0035] (2) Add the washed residue obtained in step (1) to 65% nitric acid for leaching, with a liquid-to-solid ratio of 3:1, a temperature of 98°C, and a reaction time of 0.4h, and then filter to obtain the nitric acid leaching residue. The nitric acid leaching solution is returned to the silver system to recover silver And other valuable metals;
[0036] (3) Add the nitric acid leaching residue obtained in step (2) to 98% concentrated sulfuric acid for leaching, liquid-solid ratio 2:1, temperature 100°C, reacti...
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