METHOD OF PRODUCTS REPROCESSING, CONTAINING CHALCOGENIDES OF BASE METALS, LEAD, PLATINUM METALS, GOLD AND SILVER Russian patent published in 2009 - IPC C22B11/00 C22B3/20 

FIELD: metallurgy.

SUBSTANCE: invention relates to noble metals metallurgy and can be used for reprocessing of different wastes of refining, such as dust-fumes or water-insoluble residues of dust-fumes. Method of products reprocessing, containing chalcogenides of base metals, lead, platinum metals, gold and argentum includes leaching of initial product in solution of caustic soda, separation of received alkaline solution from insoluble residue. Insoluble residue is subject to melting with addition of manufactured products of refining, sodium-bearing flux and carbonaceous reductant. After melting it is implemented grinding of separated bottom heavy phase into the powder and its treatment as a concentrate of refining. Into received during leaching initial products alkaline solution it is added sulfuric acid up to pH=4-6, it is separated laid-down from the solution deposit of hydroxides on the basis of tellurium dioxide. Solution after the sediment separation is again treated by sulfuric acid up to pH=1-2, it is added sodium sulfite and separated laid-down deposit of metal selenium, and mother solution is subject to finishing de-refining.

EFFECT: cost cutting while de-refining of received during the reprocessing solutions.

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