US 11,894,531 B2
Method for recovering lithium battery slurry and device for recovery of same
Peichao Ning, Guangdong (CN); Changdong Li, Guangdong (CN); You Zhou, Guangdong (CN); Qiang Li, Guangdong (CN); Dingshan Ruan, Guangdong (CN); and Song Chen, Guangdong (CN)
Assigned to Guangdong Brunp Recycling Technology Co., Ltd., Guangdong (CN); Hunan Brunp Recycling Technology Co., Ltd., Hunan (CN); and Hunan Brunp EV Recycling Co., Ltd., Hunan (CN)
Appl. No. 18/270,471
Filed by Guangdong Brunp Recycling Technology Co., Ltd., Guangdong (CN); Hunan Brunp Recycling Technology Co., Ltd., Hunan (CN); and Hunan Brunp EV Recycling Co., Ltd., Hunan (CN)
PCT Filed Jun. 6, 2022, PCT No. PCT/CN2022/097187
§ 371(c)(1), (2) Date Jun. 29, 2023,
PCT Pub. No. WO2023/284440, PCT Pub. Date Jan. 19, 2023.
Claims priority of application No. 202110799471.3 (CN), filed on Jul. 15, 2021.
Prior Publication US 2023/0395888 A1, Dec. 7, 2023
Int. Cl. H01M 10/54 (2006.01); C22B 7/00 (2006.01)
CPC H01M 10/54 (2013.01) [C22B 7/005 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A recovery method for a lithium battery slurry, comprising:
S1: roughly crushing a waste lithium battery slurry containing NMP, and then ball milling to obtain a ball milled slurry;
S2: sieving the ball milled slurry, and adjusting a pH value of the slurry passed through the sieve; wherein the pH value is adjusted to a range of 7.0 to 8.0;
S3: centrifugal spray-drying the pH-adjusted slurry to obtain a solid powder, and condensing and purifying the gas-phase NMP; wherein the centrifugal spray-drying is performed at a temperature of 150° C. to 300° C.