Sodium Sulfide Slagging for Removing Copper from Scrap Steel

摘要

Fundamental studies of sodium sulfide slagging for removing copper from scrap steel indicate that the copper distribution coefficient is 10, and that if 30 wt % FeS exists in the slag phase, no iron will be transferred to the slag from the metal phase. This process can be used commercially as an added fluxing step with minimal modifications to current electric-furnace steelmaking operations. Preliminary economic analysis shows an incremental return on investment equal to 100% per year. (ERA citation 08:002589)