Process for reducing carbon content of physically regenerated positive electrode product of waste lithium battery

• Main Authors: YUAN XUNLONG, FANG TING, ZHENG TIAN, LYU CHAORAN, HU WEN, LI SHOUDING, ZHAO YUZHEN
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2023
• Subjects: BASIC ELECTRIC ELEMENTS; DISPOSAL OF SOLID WASTE; ELECTRICITY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; RECLAMATION OF CONTAMINED SOIL SOIL; TRANSPORTING

The invention relates to a process for reducing the carbon content of a physically regenerated positive electrode product of a waste lithium battery. The process comprises the following steps: calcining a pole piece, and stripping a to-be-decarbonized lithium battery material on the pole piece; washing and standing the lithium battery material stripped from the pole piece, so that the carbon-containing material attached to the particle surface of the lithium battery material is separated and floats on the upper layer; removing an upper-layer solution, and drying a lower-layer settled material; the dried materials are put into airflow crushing and grading equipment to be crushed, the particle size D50 is controlled to be smaller than 1.5 micrometers through airflow crushing, and light materials with the high carbon content enter a pulse powder collecting position after being graded; and the materials in the powder collecting box are put into a flotation machine for deep flotation of the carbon materials, bubbl