Method of producing molten pig iron or molten steel pre-products

Details Method of producing molten pig iron or molten steel pre-products Method of producing molten pig iron or molten steel pre-products

1993-05-20

1995-08-29

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75961, C22B 702

Patent

active

054456681

ABSTRACT:
In a method of producing molten pig iron from lumpy, iron-ore-containing charging substances, the latter are reduced in a reduction shaft furnace by means of a reducing gas, wherein the iron sponge particles obtained are melted in a melter gasifier under supply of coal and oxygen-containing gas under simultaneous formation of the reducing gas, and the reducing gas is returned to the reduction zone of the shaft furnace.
To enable charging of larger amounts of fine ore and/or ore particles, such as oxidic iron fine dust incurred in a metallurgical plant, in addition to the charging substances, the fine ore and/or the ore dust is supplied with solid carbon carriers to at least one dust burner working into the melter gasifier and is reacted in a substoichiometric cumbustion reaction.

REFERENCES:
patent: 4784689 (1988-11-01), Vuletic
patent: 4921532 (1990-05-01), Corbett et al.

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