Process for producing pig iron

Details Process for producing pig iron Process for producing pig iron

1989-10-17

1990-04-03

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75 1022, C21B 1100

Patent

active

049137336

ABSTRACT:
A process for producing pig iron is described involving the use of a reduction shaft furnace 1 and a melt-down gasifier 2. The sponge iron produced from iron ore in the reduction shaft furnace is fed into the melt-down gasifier and converted into a pig iron melt. The gas produced in the melt-down gasifier is passed as reducing gas into the reduction shaft furnace both via a cyclone separator 11 and a line 12 and directly via a line 13. The top gas leaving the reduction shaft furnace, after passing through a scrubber 4, is largely returned via a CO.sub.2 scrubber 6, in which CO.sub.2 and H.sub.2 O are removed from the gas, in such a way that it can be used for forming the reducing gas in the melt-down gasifier and also as a cooling gas for the reducing gas produced in said gasifier.

REFERENCES:
patent: 3853538 (1974-12-01), Nemeth
patent: 4019895 (1977-04-01), Santer
patent: 4225340 (1980-09-01), Beggs et al.
patent: 4260412 (1981-04-01), Summers et al.
patent: 4317677 (1982-03-01), Weber et al.
patent: 4412858 (1983-11-01), Viramontes-Brown et al.
patent: 4543123 (1985-09-01), Vuletic
patent: 4591380 (1986-05-01), Summers et al.

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