Lithium recovery by leaching from waste cationic materials and method for preparation of lithium carbonate

Abstract

One embodiment provides a method of selectively recovering lithium from a waste cathode active material, the method including: a step of mixing and calcining a waste cathode active material and a carbon source; a step of leaching a valuable metal in the calcined mixture under acidic conditions; and a step of recovering the leached valuable metal, wherein, in the step of mixing and calcining the waste cathode active material and the carbon source, lithium contained in the waste cathode active material is converted into lithium carbonate so that lithium is selectively leached through the step of recovering the leached valuable metal, and in the step of mixing and calcining the waste cathode active material and the carbon source, the average particle size of the carbon source is 220 μm or less.

Dependencies are inferred from the claim text.