METHOD FOR REMOVING NICKEL AND CADMIUM FROM WASTE ALKALINE BATTERIES AND BATTERIES

摘要

1. A method for extracting cadmium and nickel from spent alkaline batteries and batteries (hereinafter referred to as the initial product), including their physicochemical treatment, which is carried out continuously, in cycles, while in each cycle condensed vapors of a heated ammonia solution in water are passed through the product for processing, dissolving oxides of cadmium and nickel and forming the corresponding solutions of ammonia, which are then isolated and decomposed by additional heating to cadmium and nickel hydroxides, after which these hydroxides are precipitated and separated in the form of a precipitate, and the ammonia solution is again heated to evaporation and condensed and the condensate is again passed through the remaining mass of the product for processing, and the released solution is checked for the presence of cadmium and / or nickel ammonates, respectively, by testing it with sodium or potassium sulfides, while the cycles of physicochemical treatment of the remaining product are repeated until the specified test effect is not will show the absence in the released ammonia solution. 2. A method for extracting cadmium and nickel from used alkaline batteries and batteries according to claim 1, characterized in that these articles containing cadmium and nickel oxides are mechanically affected until the initial product is obtained in the form of a homogeneous bulk mass. A method for extracting cadmium and nickel from spent alkaline batteries and batteries according to claims 1 or 2, characterized in that heating the mass of the initial product, heating the ammonia solution and heating the ammonia solutions are carried out to temperatures (90-110) ° C. 4. Method for recovering cadmium and nickel from spent alkaline batteries