Process for recovering iron and zinc from steel- making dusts

Details Process for recovering iron and zinc from steel- making dusts Process for recovering iron and zinc from steel- making dusts

C - Chemistry, Metallurgy

22

B

325/32, 53/322,

C22B 19/30 (2006.01) B03C 1/015 (2006.01) C21B 13/00 (2006.01) C22B 7/02 (2006.01)

Patent

CA 1194702

Abstract The object of the invention is to provide a process for the recovery of iron and zinc from steel making flue dust. The process comprises subjecting the flue dust to a carburizing step in a fluid bed in the presence of a reducing agent and a carbon supplying agent to break down the zinc ferrite structure and convert the iron to iron carbide, followed by heat- ing the residue or product of the carburizing step to recover zinc by evaporization. The iron carbide produced may be introduced into a steel making furnace for the production of steel. An alternative procedure is the recovery of iron carbide and zinc by magnetic separation from the gangue after the carburizing step and before separation of zinc from iron carbide.

405521

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