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Yuik Eom,Richard Diaz Alorro,Jonah Gamutan,Aleksandar N. Nikoloski 한국자원리싸이클링학회 2023 資源 리싸이클링 Vol.32 No.5
The rapidly rising demand for lithium has made the recycling of spent lithium-ion battery highly attractive. However, the conventional process has faced environmental problems due to gas and wastewater generation, high-energy consumption, and the use of strong acids/alkalis for an extended period of time. An innovative recycling technology exploiting the mechanochemical process is proposed to overcome the drawbacks of the conventional process and improve the metal recovery from spent batteries. In general, the unique mechanism by mechanochemical reaction enables metal extraction with non-hazardous materials and minimal use of solvents at ambient temperature. This emerging technique can be combined with hydrometallurgical processes and offers potential for reagent regeneration. This article reviews different recycling technologies for spent lithium-ion battery cathode materials, particularly the mechanochemical process, to achieve circular economy in spent battery recycling and enhance lithium recovery.
광산배수 처리를 위한 세멘테이션 공정 중 구리제거효율에 대한 철분 응집의 영향
나현진,엄유익,홍승관,유경근,Na, Hyunjin,Eom, Yuik,Hong, Seunggwan,Yoo, Kyoungkeun 한국자원리싸이클링학회 2019 資源 리싸이클링 Vol.28 No.5
The effects of equivalent of iron powder, particle size, agitation speed on the removal efficiency of copper ion were investigated by adding iron powder as cementation agents to simulated mine drainage solution with 117.15 mg/L Cu ion. The 50 % of Cu was removed at 90 min with 2 equivalent of iron powder while more than 99 % of Cu was removed at 60 min with 16 equivalent at 200 rpm and $20^{\circ}C$. The removal efficiencies of Cu ion were not different using 2 equivalent of $48{\mu}m$ and $150{\mu}m$ iron powder, and the removal efficiency increased rapidly with increasing the agitation speed to more than 400 rpm. This lower removal efficiency resulted from agglomeration of iron powder observed by SEM, which could reduce the effective specific surface area. More than 99 % of copper ion was removed using 2 equivalent of $48{\mu}m$ iron powder at 60 min, 600 rpm and $20^{\circ}C$.