A method for recycling waste lithium battery black powder

Abstract

The present application relates to the technical field of resource recycling, more particularly, it is a kind of waste lithium battery black powder recovery method, comprising the following steps: S1, after mixing photocatalyst, polyhydroxy auxiliary agent, waste lithium battery black powder and water, ultrasonic dispersion treatment is carried out, and mixed solution is obtained;S2, the mixed solution is placed in dark box and is carried out photocatalytic treatment, and after liquid is obtained;S3, the catalyzed liquid is transferred into the closed reaction kettle with stirring function, heated to the subcritical state of water and carried out the preferential extraction of lithium, and after solid-liquid separation, lithium extraction liquid and lithium extraction residue are obtained.The present application realizes the front-end extraction of lithium and the low-acid recovery of transition metal under the premise of not introducing strong corrosive acid and alkali, wherein the leaching rate of lithium can reach more than 99%, and the leaching rate of transition metal can reach more than 98%.

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