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US 4,270,740 AGranted
Apparatus for producing molten iron by submerged combustion
AssigneeMidrex Corporation
InventorsCharles W. Sanzenbacher, John C. Scarlett
Life of this patent
Estimating the term…
Abstract
Apparatus for reducing particulate iron oxide and producing molten iron in which coal and oxygen are injected into a molten iron bath to melt the iron, gasify the coal and produce a hot off-gas which is then used as the reductant in a counterflow shaft furnace to reduce iron oxide pellets and/or natural ore in a continuous manner. The hot reduced iron product from the shaft furnace is discharged directly into the molten iron bath from which the molten iron product is discharged.
Claims10
Apparatus for reducing particulate iron oxide and producing molten iron comprising:
- (a) a generally vertical shaft furnace having means for admitting particulate burden material at the top thereof and means for removing particulate material from the bottom thereof, means intermediate the ends of the furnace for introducing a hot reducing gas to the burden therein, and means for withdrawing spent reducing gas from the top thereof;
- (b) a melter-gasifier vessel having a molten metal bath therein, means for admitting particulate materials to the top thereof, heating means for melting said particulates in said vessel and means for withdrawing molten product from said vessel, said vessel being in sealed relationship with the discharge end of said shaft furnace;
- (c) conduit means for introducing oxygen and fossil fuel into said bath beneath the surface of said bath;
- (d) gas humidifying means in the wall of said vessel above the molten metal bath for cooling and humidifying gases from said bath within said vessel;
- and
- (e) a gas passageway communicating with said vessel and said hot gas introducing means in said furnace.
3 more elements
Dependencies are inferred from the claim text.