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Recovery of An, Ag, and Ni from PCB Wastes by CaF2-containing Slag

형우(螢右) 함유(含有) 슬래그 노이(盧理)를 통한 PCB 스크랩으로부터 Au, Ag, Ni의 회수(回收)에 관한 연구(班究)

  • Park, Joo-Hyun (School of Materials Science and Engineering, University of Ulsan)
  • 박주현 (울산대학교 첨단소재공학부)
  • Received : 2011.06.16
  • Accepted : 2011.07.18
  • Published : 2011.08.31

Abstract

Recovery of novel metals such as Au, Ag and Ni from wastes PCB was investigated by slag treatments. The CaO-$Al_2O_3$(-$SiO_2$) and CaO-$SiO_2$-$CaF_2$ slags were employed in the present study. The PCB/Cu ratio is recommended to be lower than unity. The use of CaO-$SiO_2$-$CaF_2$ slag provided the more higher yield of Au, Ag and Ni than the CaO-$Al_2O_3$(-$SiO_2$) slag did, which was mainly due to the lower melting point and the viscosity of $CaF_2$-containing slag. The terminal descending velocity of metal droplets in the slag phase increased with decreasing slag viscosity.

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