Fluidized bed reactor and method for recycling lithium precursor using same
AssigneeSK Innovation Co., Ltd.
InventorsMin Ji SUNG, Ye Rhee CHA, Sung Real SON, Ji Min KIM, Young Bin SEO, Hyeon Bae HA
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Abstract
In a method for recycling a lithium precursor of the present invention, cathode active material powders including lithium composite oxide particles and having different particle sizes are prepared. A preliminary precursor mixture is prepared by reducing the cathode active material powders in a fluidized bed reactor including a reactor body whose cross-sectional diameter is decreased stepwise or gradually from an upper portion to a lower portion. Subsequently, a lithium precursor is recovered from the preliminary precursor mixture.
Claims19
A method for recycling a lithium precursor comprising:
- preparing a cathode active material powder comprising a plurality of cathode active material powders each one of the plurality of the cathode active material powders comprising lithium composite oxide particles having different particle sizes;
- preparing a preliminary precursor mixture by reducing the cathode active material powders in a fluidized bed reactor comprising a reactor body whose cross-sectional diameter is decreased stepwise or gradually from an upper portion to a lower portion;
- and
- recovering a lithium precursor from the preliminary precursor mixture.
A fluidized bed reactor for reducing a cathode active material comprising:
- a reactor body whose cross-sectional diameter is decreased stepwise or gradually from an upper portion to a lower portion;
- an active material inlet through which a plurality of cathode active material powders including lithium composite oxide particles and having different particle sizes are injected into the reactor body;
- and
- a gas inlet located at the lower portion of the reactor body and into which a reducing gas for fluidizing the active material powder is injected.
Dependencies are inferred from the claim text.