Method of reducing finely grained material containing iron...

Details Method of reducing finely grained material containing iron... Method of reducing finely grained material containing iron...

C - Chemistry, Metallurgy

21

B

53/28

C21B 15/00 (2006.01) C21B 13/00 (2006.01) C22B 5/14 (2006.01)

Patent

CA 1070954

Inventors: PER HARALD COLLIN BJORN WIDELL Title: METHOD OF REDUCING FINE GRAINED MATERIAL CONTAINING IRON OXIDES IN A FLUID BED. Abstract: Fine-grained iron oxide is reduced in a fluidized bed. A reducing agent in the form of fine-grained solid car- bonaceous material containing volatile constituents is introduced into at least one zone of the fluidized bed. In said zone the volatile constituents are driven off, and a tarry material is temporarily formed on the surface of the particles of the carbonaceous material. The fine-grained iron oxide to be reduced is introduced into said zone. Iron oxide particles adhere to the tarry carbonaceous particles. In this way micro-aggregates are formed, but the formation of bigger aggregates is prevented.

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