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This study traces the partitioning of arsenic and other minor elements in two primary copper production flowsheets. The first flowsheet employs calcium ferrite slag during the converting stage, while the second utilizes a fayalite-based type of slag. The calculations are conducted using the self-consistent thermodynamic database within the Pb-Cu-Fe-O-S-Si-Al-Ca-Mg-Zn-Ni-Sn-As-Sb-Bi-Ag-Au-C-N-H chemical system and FactSage software operated by the Macro code. The model incorporates recycled streams and considers nonthermodynamic factors identified through literature analysis, with a focus on mechanical dust carryover and nonequilibrium arsenic evaporation. Furthermore, this study establishes a connection between the fundamentals of slag chemistry, slag/matte distribution coefficients, and the fate of arsenic, as well as other minor elements in the process.

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The Link Between Slag Chemistry and Arsenic Flows in Primary Copper Smelting

  • 会议论文

  • 发表日期：

    2025年

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  • Denis Shishin,
  • Nagendra Tripathi,
  • Igor Babaian,
  • Evgueni Jak

摘要

This study traces the partitioning of arsenic and other minor elements in two primary copper production flowsheets. The first flowsheet employs calcium ferrite slag during the converting stage, while the second utilizes a fayalite-based type of slag. The calculations are conducted using the self-consistent thermodynamic database within the Pb-Cu-Fe-O-S-Si-Al-Ca-Mg-Zn-Ni-Sn-As-Sb-Bi-Ag-Au-C-N-H chemical system and FactSage software operated by the Macro code. The model incorporates recycled streams and considers nonthermodynamic factors identified through literature analysis, with a focus on mechanical dust carryover and nonequilibrium arsenic evaporation. Furthermore, this study establishes a connection between the fundamentals of slag chemistry, slag/matte distribution coefficients, and the fate of arsenic, as well as other minor elements in the process.