METHOD OF PRODUCING LITHIUM WORKPIECES FROM REJECTED LITHIUM-CONTAINING ELECTRODES Russian patent published in 2024 - IPC C22B26/12 C22B7/00 H01M6/52 

FIELD: various technological processes.

SUBSTANCE: invention relates to production of lithium metal. Method comprises first remelting of preliminarily prepared rejected lithium-containing electrodes in melting nozzle at temperature from 240 to 250°C under cover with collection of released slag from surface of melt, at which electrodes are periodically rocked up and down to release the stainless base from lithium metal. After lithium melting in the melting cup, the stainless base is removed and placed on the metal tray for solidification, produced cylindrical blanks are cut at top and bottom edges. Second remelting of the obtained lithium workpieces in the melting nozzle under the cover with collection of slag from the melt surface is carried out similarly to the first remelting. After that, a lithium sample is taken from the obtained workpiece for lithium content, wherein if the analysis result for lithium metal content is less than 99.6%, then additional remelting is carried out, and if lithium content is more than 99.6%, the obtained workpieces are cut along the lower and upper edges. Corrosion-proof base is disposed of by grinding, oxidation in air and quenching of formed lithium salts with control of water heating of not more than 50°C and finished lithium workpieces are packed into containers.

EFFECT: invention widens the range of known methods of producing lithium workpieces, which increases convenience of their further use.

1 cl, 1 ex