source:Industry News
release time:2023-05-26
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Existing information shows that the recycling treatment of lithium iron phosphate batteries is divided into two types: one is recycling metal, and the other is the positive pole material of recycled iron phosphate.
(1) Wet recycling lithium and iron
Such processes are dominated by recycling lithium, because lithium iron phosphate does not contain precious metals, so the recycling process of lithium cobaltate is transformed. First of all, the lithium iron phosphate battery was disassembled to get the positive electrode material, and the sieve was sieved to obtain the powder. After that, the alkali solution was added to the powder, the oxide of the aluminum and aluminum was dissolved. Sulfuric acid and hydrogen peroxide (reducing agent) mixed solution immersed to obtain an immersion liquid; add alkaline to precipitated iron hydroxide, filtrate to get filtrate; burning hydroxide, can get iron oxide; finally regulate the pH value of the immersion liquid (5.0 ~ 8.0), filtrate The soaked liquid is filter, and the reinforced carbonate concentrates the crystallization of lithium carbonate.
(2) Lithium regenerative iron phosphate
A single recovery of a certain element makes the economic benefits generated by lithium iron phosphate recovery without precious metals. Therefore, it is mainly a solid -phase regeneration iron phosphate to treat lithium iron phosphate battery. This process has high recycling benefits, and the comprehensive utilization rate of resources is high.
First of all, the lithium iron phosphate battery was disassembled to get the positive electrode material, and the powder was fragmented to obtain the powder; then the heat treatment was used to remove the residual graphite and adhesive, and then added the alkali solution to the powder, dissolved aluminum and aluminum oxide; Filtering slag containing lithium, iron, etc., analyze the Moore of the iron, lithium, and phosphorus in the filtration residue. After the ball is grinded, the new lithium iron phosphate is burned in the inert atmosphere
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