Process and an arrangement for producing molten pig iron or...

Details Process and an arrangement for producing molten pig iron or... Process and an arrangement for producing molten pig iron or...

C - Chemistry, Metallurgy

21

B

53/43, 39/57

C21B 7/02 (2006.01) C21B 13/00 (2006.01)

Patent

CA 1228234

ABSTRACT OF THE DISCLOSURE There is disclosed a process for the production of molten pig iron or of steel pre-products from particulate ferrous material as well as for the production of reduction gas in a meltdown gasifier. A fluidized-bed zone is formed by coke particles upon the addition of coal and by blowing in oxygen-containing gas by nozzle pipes penetrating the wall of the meltdown gasifier. The ferrous material to be re- duced is introduced into the fluidized bed. In order to be able to produce molten pig iron and liquid steel pre-prod- ucts in a direct reduction process with a lower sulfur content than has hitherto been the case, without having to make any particular demands on the sulfur content of the coal used, the ferrous material to be reduced is supplied closely above the blow-in gas nozzle plane producing the fluidized bed. An arrangement for carrying out the process includes a meltdown gasifier in which charging pipes pene- trating its wall are provided in the region of the fluidized-bed zone closely above the plane formed by the nozzle pipes. The ferrous material to be melted as well as the dusts separated from the reduction gas and, if desired, fluxes containing calcium oxide, magnesium oxide, calcium carbonate and/or magnesium carbonate are introduced there- through.

459997

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