(同濟大學(xué) 環(huán)境科學(xué)與工程學(xué)院，上海 200092)
摘 要: 基于鋰電池負極結(jié)構(gòu)及其組成材料銅與碳粉的物料特性，采用錘振破碎、振動篩分與氣流分選組合工藝對廢鋰電池負極組成材料進行分離與回收。實驗采用ICP-AES分析實驗樣品與分離富集產(chǎn)品的金屬品位。結(jié)果表明：該負極材料經(jīng)破碎篩分后，粒徑大于0.250 mm的破碎料中銅的品位為92.4%，而粒徑小于0.125 mm的破碎料中碳粉的品位為96.6%，均可直接回收；粒度為0.125~0.250 mm的破碎料中，銅的品位較低，可通過氣流分選實現(xiàn)銅與碳粉的有效分離回收；氣流分選過程中，操作氣流速度為1.00 m/s時，銅的回收率達92.3%，品位達84.4%。
關(guān)鍵字: 廢鋰離子電池；負極材料；破碎；氣流分選
anode materials from spent lithium-ion batteries
（College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China）
Abstract:Based on the analysis of the structure and properties of anodes, the pulverization, vibratory screening and pneumatic separation were utilized to separate and recover the copper and carbon powder in the anodes from spent lithium-ion batteries. The metal grade in the samples and separation products were determined by ICP-AES. The results indicate that anode materials are pulverized first and then sieved, the grades of copper (＞0.250 mm) and carbon powder (＜0.125 mm) in the crushed particles reach 92.4% and 96.6%, respectively, which can be recycled directly. As for the specific particles (0.125−0.250 mm) with low copper grade, the pneumatic separation was applied to achieve an effective separation of copper and carbon particle. When the flow velocity is 1.00 m/s, the recovery rate and grade of copper reach 92.3% and 84.4%, respectively.
Key words: lithium-ion battery; anode; pulverization; pneumatic separation
