Method for removing impurities from waste battery leachate

• Main Authors: FU ZHONGMENG, GONG QINXUE, ZHOU RONGCHAO, LU JUNQUE, TAN YUNJUN, ZHENG YU, WANG DU, LIU YONGQI
• Format: Patent
• Language: Chinese; English
• Published: 19.06.2020
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a method for removing impurities from waste battery leachate. The method comprises the following steps that iron powder is added, and filtering is carried out after stirring so as to obtain a copper-removed solution; an oxidant is added to obtain a ferrous-removed solution; a small amount of the ferrous-removed solution is taken and diluted to serve as a base solution, theferrous-removed solution and a pH regulator are added, the pH regulator is continuously added after the ferrous-removed solution is completely added, and filtering is carried out after stirring so asto obtain an iron-aluminum-removed solution and iron-aluminum slag; fluoride is added into the iron-aluminum-removed solution, and filtering is carried out after stirring so as to obtain a calcium-magnesium-removed solution; the obtained iron-aluminum slag is added, and filtering is carried out after stirring so as to obtain fluorine-silicon-removed solution and fluorine-silicon-removed iron-aluminum slag; and manganese p