Abstract: System for electric extraction of non-ferrous metals from their solutions. The system includes means for applying a reversing electric current of different duration for the current for the electric extraction and the dissolution. The system has means for conducting the process simultaneously in two groups of electrolytic baths, the electric current for dissolution for each group of electrolytic baths being provided by the electric current for electric extraction in the other group of electrolytic baths.

Abstract: An improved technique for purifying a solution of metallic salts from copper and cadmium contained in such solution is described. A bed of zinc granules is disposed on a grid at the bottom of a vertically arranged, cylindrical reaction chamber. The solution to be purified is pumped upwardly through the grid and the zinc bed at a speed in the range of 0.08-0.5 m/sec. to impart a turbulent motion to the zinc granules throughout the height of the reaction chamber. The turbulence causes the copper-cadmium cake adhering to the zinc particles during the reaction to separate from the granules, so that the separated cake flows out of the reaction chamber with the purified liquid to be quickly and easily removed therefrom.

Abstract: Method of and system for electric extraction of non-ferrous metals from their solutions. The process is effected by applying a reversing electric current of different duration for the current for the electric extraction and the dissolution. The process is conducted simultaneously in two groups of electrolytic baths, the electric current for dissolution for each group of electrolytic baths being provided by the electric current for electric extraction in the other group of electrolytic baths.