Method for treating metal-containing solution

The present disclosure provides a method for treating a metal-containing solution, in which the metal is selected from nickel, cobalt, zinc or copper, and the metal-containing solution comprises a metal sulfate. The method includes: (1) mixing the metal-containing solution with lime cream to obtain a liquid-solid mixture; (2) performing a thickening treatment on the liquid-solid mixture to obtain an overflow containing a metal hydroxide precipitate and an underflow containing calcium sulfate; and (3) filtering the overflow containing the metal hydroxide precipitate to obtain the metal hydroxide and a filtrate. mixing the metal-containing solution with lime cream to obtain a liquid-solid mixture performing a thickening treatment on the liquid-solid mixture to obtain an overflow containing a metal hydroxide precipitate and an underflow containing calcium sulfate filtering the overflow containing the metal hydroxide precipitate to obtain the metal hydroxide and a filtrate Fig. 1 mixing the metal-containing solution with lime cream to obtain a liquid-solid mixture performing a primary thickening treatment on the liquid-solid mixture to obtain a first underflow and a first overflow containing the metal hydroxide precipitate performing a secondary thil ening treatment on the first S220 underflow to obtain the underflow containing calcium sulfate and a second overflow containing the metal hydroxide prei-riitate filtering the overflow containing the metal hydroxide precipitate to obtain the metal hydroxide and a filtrate Fig. 2