RECOVERY METHOD OF RAW MATERIAL FOR MANUFACTURING FERRONICKEL FROM WASTE NICKEL HYDROGEN BATTERY AND

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PROBLEM TO BE SOLVED : To provide a recovery method of a raw material for manufacturing ferronickel from a waste nickel hydrogen battery capable of setting bleeding percentage of nickel to 85% or more even when a bleeding reaction of valuable metals or the like and a crystallization reaction of rare earth elements are same process and a recovery device thereof. SOLUTION : A recovery method has a bleeding and crystallization process S1 of supplying a sulphuric acid solution and sulfate of an alkali metal to a valuable metal-containing article to obtain a bleeding and crystallization slurry and a first solid liquid separation process S2 of solid solution separating the bleeding and crystallization slurry into a mixture of a bleeding residue and a mixture deposit of sulfate double salt of rare earth elements and a liquid excluding rare earth elements, and sulfate of the alkali metal is supplied after adding sulphuric acid solution to the valuable metal-containing article in the bleeding and crystallization process S1. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2017, JPO&INPIT