FLUIDIZED BED TREATMENT OF EAF DUST

摘要

The invention concerns a method of treating electric arc furnace (EAF) dust. In the method the dust is preheated and decontaminated under conditions which oxidize the magnetite content of the dust to hematite. Thereafter the preheated and decontaminated dust is introduced into a fluidized bed reactor in which hematite is reduced, by means of a hot reducing gas generated by reforming natural gas in a non-catalytic plasma-arc heating process, to yield an iron-rich material suitable for recycling to the EAF, and a high grade zinc oxide product.