PROCESSING METHOD OF COPPER ANODE SLIME Russian patent published in 2015 - IPC C22B7/00 C22B61/00 C22B15/00 C22B3/12 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy of non-ferrous and precious metals, namely to processing of slimes of electrolytic copper refining. A processing method of copper anode slime involves decoppering, saturation and leaching of selenium from decoppered slime or products of its saturation in an alkaline solution. Leaching of selenium is performed in a solution that contains a reducing agent, namely water-soluble organic or non-organic compounds providing a normal oxidation-reduction potential of the system in alkaline medium of more positive than -0.3 V in relation to a hydrogen electrode. With that, leaching is performed in a solution containing 50-200 g/l of sugar as a reducing agent and 20-100 g/l of alkaline at the temperature of 70-90°C.

EFFECT: increasing speed and limit degree of selenium leaching.

2 cl, 2 tbl, 1 ex