PROCESS FOR THE SELECTIVE RECOVERY OF LEAD AND SILVER AND CARBONATE LEAD AND SILVER CONCENTRATE, OBTAINED BY THE METHOD ABOVE Russian patent published in 2018 - IPC C22B11/00 C22B13/00 C22B3/10 C22B3/44 C22B7/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a process for the selective and ecoefficient recovery of lead and silver jointly as a concentrate product from hydrometallurgical residues. Method comprises oxidative leaching of wastes of hydrometallurgical production containing at least lead and silver in the presence of a chloride brine solution and an oxidizing agent to ensure the selectivity of the solubilizing lead and silver by transferring them to the state of soluble chlorides; and reacting the enriched leach solution obtained in the above oxidative leaching with the carbonate compound which acts as precipitating agent thus jointly precipitating lead and silver as a carbonate concentrate. And purifying the concentrate obtained by contacting said concentrate with a carbonate compound solution with 0.01–0.5 % of lead and silver in the carbonate concentrate in dry weight.

EFFECT: simultaneous separation of lead and silver into a single high quality concentrate.

14 cl, 1 dwg, 15 tbl, 10 ex