The method for recovering the battery negative electrode material

A method of recovering LiFePO4 battery negative electrode material: a, after removing housing LiFePO4 battery discharge, positive separation, a negative electrode and a separator; B, the membrane is completely immersed in water for 10min-1h, the separator or manually scrub stirrer aqueous 3min- 20min, remove the diaphragm; C, the negative electrode plate is completely immersed in the aqueous solution, the negative electrode sheet or scrub manually stirred with aqueous 3min-1h, the copper foil current collector with a surface of the conductive fluid separating agent, remove the copper foil, a conductive agent salvage recovery; d, aqueous solution was filtered, the filtrate was heated to 80-100 deg.] C, was added at a concentration of mass per 1L 30-200mL filtrate was 10-30% Na2CO3 solution, the reaction 10min-2h, filtered and the filter cake was washed with boiling water, 1-5 times, each times with boiling water 10-50mL, and dried to obtain pure Li2CO3 product, the filtrate was recycled.