Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1992-05-26
1993-02-09
Kastler, Scott
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
266172, 75450, C21B 110
Patent
active
051850320
ABSTRACT:
A fluidized bed direct process for reducing raw iron ore fines and directly producing an iron product comprises a process for feeding raw iron ore fines into a multi-stage reactor assembly; a process for reducing fines in fluidized beds developed by a counter-current flow of reducing gas, where the reducing gas is developed in a process for directly producing slag and iron in a gasifier/smelter assembly; a process for producing iron by further reducing and removing impurities from a part of the reduced iron ore in a gasifier/smelter assembly; a process for compacting excess reduced iron ore; and, a process for preparing reducing gas from offgas exiting said gasifier/smelter assembly; and, a process for recycling spent reducing gas exiting said reactor assembly. The processed offgas is 100% utilizable as reducing gas by balancing the reduced iron ore between the gasifier/smelter and compacting assemblies. The iron product exiting said gasifier/smelter assembly is refinable into steel with standardly available refining methods, such as those using ladle or basic oxygen furnaces for removal of impurities prior to casting.
REFERENCES:
patent: 3160498 (1964-12-01), Olt et al.
patent: 4359212 (1982-11-01), Bengtsson et al.
patent: 4734128 (1988-03-01), Becerra-Novoa et al.
patent: 4946498 (1990-08-01), Weber
Fior de Venezuela
Kastler Scott
Violette John-Paul J.
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