Abstract: An apparatus for obtaining enriched fractions from storage batteries is preferably three units connected in series, each of which has two concentrically disposed drums provided with helical strips on their inner wall. Concentrically to the axis of the outer drum is mounted an inner perforated drum to which are fastened perforated blades and are formed longitudinal openings over which are fixed reflectors and a screen. In its rear end, the inner perforated drum ends in a conic perforated passage to which is fastened a tube with a helical strip and outlet opening.

Abstract: A metallurgical apparatus; air is continuously blown into a mixture of agglomerates of lead concentrates and carbonaceous fuel in a shaft furnace. The resulting slag is delivered from the shaft furnace into a settling tank to which the slag continuously flows while the slag is continuously delivered from the settling tank into a fuming furnace, so that the slag flows in cascade from the shaft furnace to the settling tank and from the settling tank to the fuming furnace, thereby providing a continuous flow of the treated slag from the shaft furnace through the settling tank into the fuming furnace; the slag, in addition, is continuously withdrawn from the shaft furnace.

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.