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Whether top-blowing rotary converters, top submerged lance smeltersSmelter, or other smeltingSmelting processes are used for converting WEEEWaste Electrical and Electronic Equipment (WEEE) (electric and electronic waste, computer scrap) or mixtures of slagSlag from copper smeltersCopper smelter with electrowaste and/or computer scrap to recover copperCopper and other precious metalsPrecious metals, an off-gas treatmentGas treatment is required to ensure an environmentally clean process. The off-gases from these furnacesFurnace differ from the usual gases of primary smeltersSmelter, as they often contain a very low load of SO2 (thus, a sulfuric acid plantSulfuric acid plant is not an option) but very high loads of hydrofluoric acid, hydrochloric acid, hydrobromic acid, and bromine. Further, some processes may carry high mercury loads. For environmental complianceEnvironmental compliance with specific clean gas requirements, multistage gas cleaning trains and advanced materials of constructionConstruction may become necessary. In this paper, GEA presents different treatments of these off-gases as well as key performancePerformance values. Besides the equipmentEquipment of a typical gas cleaning train for primary copper smeltersCopper smelter, which consists of hot electrostatic precipitatorElectrostatic precipitator, scrubbersScrubber, and packed coolingCooling towers followed by wet electrostatic precipitatorsElectrostatic precipitator and often mercury removal technologiesTechnology, additional equipmentEquipment for halideHalide removal as well as advanced material concepts to deal with corrosive halidesHalide will also be explored.

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Designing Gas Cleaning Plants for E-Scrap Recycling Furnaces

  • 会议论文

  • 发表日期：

    2025年

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  • Miguel González,
  • Alfredo Martínez,
  • Federico Mercado

摘要

Whether top-blowing rotary converters, top submerged lance smeltersSmelter, or other smeltingSmelting processes are used for converting WEEEWaste Electrical and Electronic Equipment (WEEE) (electric and electronic waste, computer scrap) or mixtures of slagSlag from copper smeltersCopper smelter with electrowaste and/or computer scrap to recover copperCopper and other precious metalsPrecious metals, an off-gas treatmentGas treatment is required to ensure an environmentally clean process. The off-gases from these furnacesFurnace differ from the usual gases of primary smeltersSmelter, as they often contain a very low load of SO2 (thus, a sulfuric acid plantSulfuric acid plant is not an option) but very high loads of hydrofluoric acid, hydrochloric acid, hydrobromic acid, and bromine. Further, some processes may carry high mercury loads. For environmental complianceEnvironmental compliance with specific clean gas requirements, multistage gas cleaning trains and advanced materials of constructionConstruction may become necessary. In this paper, GEA presents different treatments of these off-gases as well as key performancePerformance values. Besides the equipmentEquipment of a typical gas cleaning train for primary copper smeltersCopper smelter, which consists of hot electrostatic precipitatorElectrostatic precipitator, scrubbersScrubber, and packed coolingCooling towers followed by wet electrostatic precipitatorsElectrostatic precipitator and often mercury removal technologiesTechnology, additional equipmentEquipment for halideHalide removal as well as advanced material concepts to deal with corrosive halidesHalide will also be explored.