Method for removing iron and aluminum from nickel-cobalt-manganese solution

• Main Authors: GONG QINXUE, WANG YUBIN, ZHOU RONGCHAO, LU JUNQUE, TAN YUNJUN, WANG DU, LIU YONGQI
• Format: Patent
• Language: Chinese; English
• Published: 10.04.2020
• 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 discloses a method for removing iron and aluminum from a nickel-cobalt-manganese solution. The method comprises the following steps of adding an oxidant solution and a precipitant solution into the nickel-cobalt-manganese solution containing iron-aluminum impurities, stirring and heating the mixed solution to 50-80 DEG C, controlling the pH value to be 2.5-3.0, and performing reaction for 0.5-1.0 h; and then, continuing adding a precipitant solution, stirring and heating the mixed solution to 50-80 DEG C, controlling the pH value to be 4.6-5.1, and performing aging and filteringto obtain iron-aluminum slag and the nickel-cobalt-manganese solution with the iron-aluminum impurities removed. According to the method, two stages are adopted for removing the iron and aluminum, inthe first stage, the pH value of a material liquid is controlled, and the materials are added parallelly at the same time to precipitate most of iron ions firstly, and in the second stage, the precipitant solution is added sep