Process for the production of pig iron and sponge iron

Details Process for the production of pig iron and sponge iron Process for the production of pig iron and sponge iron

1991-11-27

1993-08-24

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C21B 1314

Patent

active

052384870

ABSTRACT:
A process for producing pig iron is described, which contains a reducing shaft furnace 1 and a melting gasifier 2. The sponge iron produced from iron ores in the reducing shaft furnace is supplied to the melting gasifier and converted there into a pig iron melt. The gas produced in the melting gasifier is supplied directly via a line 4 as reducing gas to the reducing shaft furnace. The blast furnace gas passing out of the reducing shaft furnace, after traversing a CO.sub.2 scrubber 6, is at least partly heated in a heat exchanger to 200.degree. to 500.degree. C. and passed to a partial combustion plant 13 where, accompanied by the addition of oxygen, the gas is heated to the necessary reducing temperature.

REFERENCES:
patent: 4857105 (1989-08-01), Hauk et al.
patent: 5043011 (1991-08-01), Hauk

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