Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1990-01-30
1991-08-27
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75 1022, C22B 110
Patent
active
050430114
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 top 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.
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Andrews Melvyn J.
Deutsche Voest-Alpine Industrieanlagenbau GmbH
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