Recovering selenium from copper refinery slimes

@article{Hyvrinen1989RecoveringSF,
  title={Recovering selenium from copper refinery slimes},
  author={Olli Hyv{\"a}rinen and Leo Lindroos and Erkki Yll{\"o}},
  journal={JOM},
  year={1989},
  volume={41},
  pages={42-43}
}
The selenium contained within copper refinery slimes may be recovered advantageously by roasting at about 600°C. While roasting in air is inefficient, roasting in a sulfating atmosphere enables practically complete selenium recovery. Based on laboratory tests, a new selenium recovery process was adopted at Outokumpu Copper Refinery. In this process, sulfation is achieved by feeding sulfur dioxide and oxygen into the roasting furnace. 
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