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Since 2003, Toyo SmelterSmelter and Refinery has been working on developing the technologiesTechnology to improve the smeltingSmelting capacity of the concentrateConcentrate burner in the flash furnaceFlash furnace process. In order to cope with the increasing amount of treated copper concentrateCopper concentrate in the flash furnaceFlash furnace, one converter furnaceFurnace was added, and the converter operationOperation pattern was shifted from 2-hot-2-blowing to 3-hot-2-blowing in 2005. In 2016, cathodeCathode copper productionCopper production reached 450,000 tons per year. In addition, with the aim of achieving a closed loop process and reducingReducing greenhouse gas (GHG) emissionsEmissions, continued efforts have been made to increase the amount of secondary raw materialsSecondary raw material treated in the converter process. As a result, the ratio of copperCopper produced from secondary raw materialsSecondary raw material exceeded 20% in recent years. In the converter process, both the slagSlag making stage and the copperCopper making stage involve exothermic reactions, requiring the addition of coolingCooling materials to maintain the appropriate operating temperature. Secondary raw materialsSecondary raw material are part of these coolingCooling materials. This includes not only high-gradeGrade materials with a copperCopper content exceeding 90%, but also low-gradeGrade materials such as electronic scrap. In the past, increasing the treatment of secondary raw materialsSecondary raw material in converters decreased the fluidity of converter slagConverter slag and increased the copperCopper loss in the converter slagConverter slag. Various investigations revealed that the variation in the composition of secondary raw materialsSecondary raw material caused deterioration of converter slagConverter slag when the processingProcessing amount of secondary raw materialsSecondary raw material was increased. Therefore, by focusing on the composition of secondary raw materialsSecondary raw material and working on improving the processingProcessing methods, it has become possible to significantly increase the secondary raw materialsSecondary raw material processingProcessing while preventing the deterioration of converter slagConverter slag properties.

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Increased Treatment of Secondary Raw Materials in the PS Converter Operation at Toyo Smelter and Refinery

  • 会议论文

  • 发表日期：

    2025年

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  • H. Wada,
  • S. Sasai,
  • T. Kudo

摘要

Since 2003, Toyo SmelterSmelter and Refinery has been working on developing the technologiesTechnology to improve the smeltingSmelting capacity of the concentrateConcentrate burner in the flash furnaceFlash furnace process. In order to cope with the increasing amount of treated copper concentrateCopper concentrate in the flash furnaceFlash furnace, one converter furnaceFurnace was added, and the converter operationOperation pattern was shifted from 2-hot-2-blowing to 3-hot-2-blowing in 2005. In 2016, cathodeCathode copper productionCopper production reached 450,000 tons per year. In addition, with the aim of achieving a closed loop process and reducingReducing greenhouse gas (GHG) emissionsEmissions, continued efforts have been made to increase the amount of secondary raw materialsSecondary raw material treated in the converter process. As a result, the ratio of copperCopper produced from secondary raw materialsSecondary raw material exceeded 20% in recent years. In the converter process, both the slagSlag making stage and the copperCopper making stage involve exothermic reactions, requiring the addition of coolingCooling materials to maintain the appropriate operating temperature. Secondary raw materialsSecondary raw material are part of these coolingCooling materials. This includes not only high-gradeGrade materials with a copperCopper content exceeding 90%, but also low-gradeGrade materials such as electronic scrap. In the past, increasing the treatment of secondary raw materialsSecondary raw material in converters decreased the fluidity of converter slagConverter slag and increased the copperCopper loss in the converter slagConverter slag. Various investigations revealed that the variation in the composition of secondary raw materialsSecondary raw material caused deterioration of converter slagConverter slag when the processingProcessing amount of secondary raw materialsSecondary raw material was increased. Therefore, by focusing on the composition of secondary raw materialsSecondary raw material and working on improving the processingProcessing methods, it has become possible to significantly increase the secondary raw materialsSecondary raw material processingProcessing while preventing the deterioration of converter slagConverter slag properties.