Method for recovering iron phosphate and lithium carbonate from waste lithium battery positive electrode material

The invention discloses a method for recovering iron phosphate and lithium carbonate from a waste lithium battery positive electrode material. The preparation method comprises the following steps: (1) sequentially carrying out microwave heating and microwave acidification on the waste lithium battery positive electrode material to obtain a product a; the temperature of microwave heating is 450-650 DEG C; (2) in the presence of acid, carrying out ball milling on the product a to obtain a product b; in the ball milling process, the mass of milling balls accounts for 30%-60% of the total mass of ball milling materials; the ball milling time is 0.8 to 3h; and (3) carrying out iron-lithium separation on the product b to respectively obtain iron phosphate and lithium carbonate. The method disclosed by the invention is simple in process, short in time consumption, low in production cost and high in leaching rate of iron and lithium elements. 本发明公开了一种从废旧锂电池正极材料中回收磷酸铁和碳酸锂的方法。该制备方法包括以下步骤：(1)将废旧锂电池正极材料依次经微波加热、微波酸化，制得产物a