METHOD FOR PRODUCING SECONDARY BATTERY MATERIALS FROM BLACK MATTER

Abstract

This invention is for the designation of a method for producing secondary battery materials from black. The designation of secondary battery materials from black includes a calcination step to calcine the black, a subsequent extraction step to extract the calcined black with water to separate the lithium solution and the liquid, a first evaporation and concentration step to produce lithium carbonate crystals by evaporation and concentration of the lithium solution produced in the pre-extraction step, an extraction step to extract the liquid separated in the pre-extraction step, a first filtration step to remove copper and aluminum from the liming solution produced in the filtration step, and a post-extraction step to neutralize the solution prepared in the first filtration step and separate the solution into lithium and Ni-containing liquid.Co, and Mn (NCM liquid), the supply step provides the lithium carbonate crystals produced in the first evaporation and concentration step and the lithium solution prepared in the post-extraction step for the lithium hydroxide production step.