Arrangement comprising a gasifier and a direct reduction furnace
AssigneesKorf Engineering GmbH, Voest-Alpine Aktiengesellschaft
InventorsKlaus Langner, Gero Papst, Rolf Hauk, Michael Nagl
Life of this patent
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Abstract
In the case of an arrangement comprising a gasifier and a direct reduction shaft furnace positioned above it and which is connected to the gasifier by a connecting shaft, the direct introduction of the reduction gas obtained in the gasifier, even in the case of a high dust proportion, is made possible in that the sponge iron particles are discharged through several radially positioned screw conveyors and the reduction gas is fed to an annular zone formed above the screw conveyors.
Claims17
A combined melting gasifier and a direct reduction shaft furnace structure for reducing lumpy iron ore or iron oxide pellets, comprising a base adapted to support a charging column of ore in the shaft furnace, at least one discharge port being formed in the base for discharging sponge iron particles produced by reduction of said ore and at least one annular intake being formed in said shaft furnace to convey the reduction gas supplied by the gasifier to the charge in the lower part of the charging column, and mechanical means disposed at the base of said shaft furnace for causing the continuous reciprocal movement of the reduced charge particles in an area adjacent said annular intake for the reduction gas.
Dependencies are inferred from the claim text.