LEACHING METHOD FOR TERNARY BATTERY POWDER

WIPO Patent Application WO/2024/037272

A1

A leaching method for a ternary battery powder, which method comprises the following steps: the formulation of a reaction slurry, dechlorination, fluorine removal, alkali leaching, roasting, water leaching and high-pressure leaching, wherein the dechlorination is mainly achieved by adding a calcium oxide powder and a sodium metaaluminate solution; the fluorine removal is mainly achieved by means of coagulating sedimentation; the alkali leaching comprises adding sodium hydroxide to the solution, which has been subjected to fluorine removal and dechlorination, for leaching; the roasting comprises uniformly mixing the alkali leaching slag powder and a roasting additive for roasting; the water leaching comprises adding pure water to the roasting slag for leaching; and the high-pressure leaching comprises uniformly mixing the water-leaching slag powder and a leaching additive, then adding the mixture to a high-pressure kettle, then adding pure water and sulfuric acid thereto, uniformly stirring the mixture, and subjecting the mixture to high-pressure leaching.

LIU YONGQI (CN)
HE RAN (CN)
CHENG QINGYUN (CN)
ZHENG YU (CN)
GONG QINXUE (CN)
LI CHANGDONG (CN)

PCT/CN2023/108096

February 22, 2024

July 19, 2023

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GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)

C22B7/00; C22B26/12; H01M10/54

WO2023002048A1	2023-01-26
WO2023050804A1	2023-04-06
WO2023071353A1	2023-05-04

CN113943864A	2022-01-18
CN112827337A	2021-05-25
CN110767954A	2020-02-07

GUANGZHOU JUNCY INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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