METHOD OF TREATMENT OF COPPER ELECTROLYSIS SLIME FLOATATION CONCENTRATE CONTAINING PRECIOUS METALS Russian patent published in 2012 - IPC C22B11/00 C22B61/00 C22B7/00 C22B3/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to a method of treatment of copper electrolysis slime floatation concentrate containing precious metals. The method includes leaching and precious metal extraction. Prior to leaching, sintering of floatation concentrate is done in a saline mixture of NaNO₃ and NaOH at a ratio 3: 2 at 350-370°C during an hour. The product produced by sintering is subjected to leaching conducted by water at a ratio S:L-1:3 resulting in metal fraction production. The latter is directed to extraction of precious metals through refining and pulp containing a salt fraction and a solution. The pulp is subjected to filtering, wherein the solution is used rot tellurium and selenium extraction, and the salt fraction is used for lead and antimony extraction.

EFFECT: separating of silver, aurum and platinum metals is simplified, silver and aurum loss in water solutions is reduced, and power inputs and labour expenditures are lowered.

1 dwg, 5 ex