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CopperCopper producers which are aggressive in enhancing their recyclingRecycling businesses have been facing an increase in the tinTin concentration of their feeds because the fastest growing business in the venous industry is the recyclingRecycling of waste electrical and electronic equipmentWaste Electrical and Electronic Equipment (WEEE) or E-waste which contains Sn-base solder alloy. Such business circumstances require technologiesTechnology to make homogeneous slagsSlag even though those slagsSlag are extraordinary rich in tinTin, while avoiding the precipitationPrecipitation of both magnetite and refractoryRefractories stannic oxide. UsingLime-ferrite slag lime-ferrite slagSlag of the CaO–FeOx–Cu2O system has been a proven technologyTechnology to avoid the precipitationPrecipitation of magnetite under any oxidizingOxidizing atmosphere. The present paper, thus, experimentally determined the phase equilibriaPhase equilibria between the CaO–FeOX–SnOY–Cu2O system and moltenMolten copperCopper under various oxygen pressures between 10–9 and 10–5 atm at 1250 and 1300 ℃. The results have been converted into the solubilitySolubility of Sn in lime-ferrite slagSlag and the distributionDistribution behavior of tinTin between the slagSlag and copperCopper. The present paper will also discuss the feasible copper smeltingCopper Smelting/converting operationsOperation with feeding plenty of tinTin into a copper smeltingCopper Smelting furnaceFurnace.

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Thermodynamic Behavior of Tin in Primary/Secondary Smelting Systems Using Lime-Ferrite Slag

  • 会议论文

  • 发表日期：

    2025年

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  • Naoyuki Hashimoto,
  • Shigeru Ishikawa,
  • Fumito Tanaka

摘要

CopperCopper producers which are aggressive in enhancing their recyclingRecycling businesses have been facing an increase in the tinTin concentration of their feeds because the fastest growing business in the venous industry is the recyclingRecycling of waste electrical and electronic equipmentWaste Electrical and Electronic Equipment (WEEE) or E-waste which contains Sn-base solder alloy. Such business circumstances require technologiesTechnology to make homogeneous slagsSlag even though those slagsSlag are extraordinary rich in tinTin, while avoiding the precipitationPrecipitation of both magnetite and refractoryRefractories stannic oxide. UsingLime-ferrite slag lime-ferrite slagSlag of the CaO–FeOx–Cu2O system has been a proven technologyTechnology to avoid the precipitationPrecipitation of magnetite under any oxidizingOxidizing atmosphere. The present paper, thus, experimentally determined the phase equilibriaPhase equilibria between the CaO–FeOX–SnOY–Cu2O system and moltenMolten copperCopper under various oxygen pressures between 10–9 and 10–5 atm at 1250 and 1300 ℃. The results have been converted into the solubilitySolubility of Sn in lime-ferrite slagSlag and the distributionDistribution behavior of tinTin between the slagSlag and copperCopper. The present paper will also discuss the feasible copper smeltingCopper Smelting/converting operationsOperation with feeding plenty of tinTin into a copper smeltingCopper Smelting furnaceFurnace.