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Research Article

Rapid Removal of the Copper Impurity from Bismuth-Copper Alloy Melts via Super-Gravity Separation

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  • Received: 26 April 2020Revised: 29 May 2020Accepted: 15 June 2020Available online: 17 June 2020
  • To rapidly remove the copper impurity from bismuth-copper alloy melts, a green method of super-gravity separation was investigated, which has the characteristics of enhancing the filtration process of bismuth and copper phases. In this study, the influence of super-gravity on the removal of copper impurity from bismuth-copper alloy melts was discussed. After super-gravity separation, the liquid bismuth-rich phases were mainly filtered into the lower crucible, while most of the fine copper phases were remained in the opposite direction. With optimized conditions of T = 280℃, G = 450, and t = 200 s, the purity of the filtered bismuth phase exceeded 99.7wt%, and the mass proportion of the separated bismuth of Bi-2wt%Cu and Bi-10wt%Cu alloys reached 96.27wt% and 85.71wt% respectively, which indicated the little loss of bismuth in the residual. Simultaneously, the removal rate of copper impurity went to 88.0% and 97.8%, respectively. Furthermore, the separation process could be completed rapidly, environmentally friendly and efficiently.
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Rapid Removal of the Copper Impurity from Bismuth-Copper Alloy Melts via Super-Gravity Separation

  • Corresponding author:

    Zhan-cheng Guo    E-mail: zcguo@ustb.edu.cn

  • State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

Abstract: To rapidly remove the copper impurity from bismuth-copper alloy melts, a green method of super-gravity separation was investigated, which has the characteristics of enhancing the filtration process of bismuth and copper phases. In this study, the influence of super-gravity on the removal of copper impurity from bismuth-copper alloy melts was discussed. After super-gravity separation, the liquid bismuth-rich phases were mainly filtered into the lower crucible, while most of the fine copper phases were remained in the opposite direction. With optimized conditions of T = 280℃, G = 450, and t = 200 s, the purity of the filtered bismuth phase exceeded 99.7wt%, and the mass proportion of the separated bismuth of Bi-2wt%Cu and Bi-10wt%Cu alloys reached 96.27wt% and 85.71wt% respectively, which indicated the little loss of bismuth in the residual. Simultaneously, the removal rate of copper impurity went to 88.0% and 97.8%, respectively. Furthermore, the separation process could be completed rapidly, environmentally friendly and efficiently.

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