【摘要】：對(duì)比研究廢棄鋰離子電池富鈷破碎產(chǎn)物與商品化電極材料的浮選行為,并分析不同浮選行為的機(jī)理。結(jié)果表明:商品化鈷酸鋰和石墨的天然可浮性差異較大,將以質(zhì)量比1:1混合后的模擬物料進(jìn)行浮選,鈷品位由15.66%富集到50.71%;手工拆解廢棄鋰離子電池得到的鈷酸鋰顆粒和石墨顆粒表面粗糙,有雜質(zhì)附著,使得電極材料表面相關(guān)元素的含量降低,該雜質(zhì)為以C、F、P和O元素為主的有機(jī)物,使回收的鈷酸鋰和石墨顆粒表面化學(xué)組成相近,造成材料表面潤濕性發(fā)生改變;富鈷破碎產(chǎn)物經(jīng)浮選后,鈷品位由24.21%僅提高到28.08%。因此,浮選前必須對(duì)回收的富鈷破碎產(chǎn)物進(jìn)行表面改性,以增大鈷酸鋰和石墨表面潤濕性差異,從而使浮選獲得有效的分離。
[Abstract]:The flotation behavior of cobalt-rich broken products and commercial electrode materials for waste lithium-ion batteries was compared and studied, and the mechanism of different flotation behaviors was analyzed. The results show that the natural floatability of commercial lithium cobalt and graphite is quite different. The grade of cobalt is enriched from 15.66% to 50.71% when the simulated material mixed with mass ratio 1:1 is used for flotation. The surface of lithium cobalt and graphite particles obtained by manual dismantling of waste lithium ion batteries are rough and impurity attached, which reduces the content of related elements on the surface of electrode materials. The impurities are mainly C, F, P and O elements. The surface chemical composition of the recovered lithium cobalt and graphite particles is similar, resulting in a change in the surface wettability of the material. After flotation, the grade of cobalt increased only from 24.21% to 28.08%. Therefore, it is necessary to modify the surface of the recovered cobalt-rich broken products before flotation in order to increase the surface wettability difference between lithium cobalt acid and graphite, so that the flotation can be separated effectively.
【作者單位】： 中國礦業(yè)大學(xué)化工學(xué)院;中國礦業(yè)大學(xué)現(xiàn)代分析與計(jì)算中心;
【基金】：上海電子廢棄物資源化產(chǎn)學(xué)研合作開發(fā)中心開放基金項(xiàng)目(ZF1224-07)
【分類號(hào)】：TM912

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