METHOD OF LEACHING-OUT POLYMETALLIC RAW MATERIAL AND DEVICE FOR REALIZATION OF THIS METHOD Russian patent published in 2005 - IPC

FIELD: non-ferrous metallurgy; leaching-out polymetallic hard-to-open materials.

SUBSTANCE: proposed method includes treatment of material with chlorine in aqueous solution containing chlorine ions which is stirred in anode space of electrolyzer with separated anode and cathode spaces; as a result pulp is obtained; leaching-out operation is performed in anode space of electrolyzer separated from cathode space by cation-exchange membranes; operation is performed in aqueous solution containing hydrochloric acid in presence of nitrogen oxides at additional delivery of chlorine-containing gas by suction of this gas into rarefaction zone formed by impeller stirring the pulp. Gas formed during leaching-out process is combined with chlorine-containing gas; layer of finely-dispersed particles formed on surface of pulp is removed and is fed to stirring zone in lower part of anode space; productive leaching-out solution obtained after separation of it from insoluble residue is delivered to cathode space of electrolyzer; leaching-out process is performed at anode potential ensuring discharge of chlorine ions and cathode potential not exceeding the potential of discharge of hydrogen ions. Device proposed for realization of this method has housing with cover; interior of housing is divided into anode and cathode spaces with anodes and cathodes located inside them, units for loading the initial materials and discharging pulp formed during leaching-out process and units for mixing and feeding the chlorine-containing gas; anode space is made in form of chamber and cathode chambers are located on its opposite sides; anode chamber walls contain cation-exchange membranes; stirring unit is provided with impeller located below lower edge of anodes; vertical fins are provided on inner surface of anode chamber at level of impeller.

EFFECT: increased rate of extraction of beneficial components from initial material into solution for further extraction of them from solution.

17 cl, 3 dwg, 1 tbl, 8 ex