Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1986-06-18
1988-02-16
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 38, 75 40, 75 43, C21B 1108
Patent
active
047253088
ABSTRACT:
There is disclosed a process for the production of molten pig iron or of steel pre-products from particulate ferrous material as well as for the production of reduction gas in a meltdown gasifier. A fluidized-bed zone is formed by coke particles upon the addition of coal and by blowing in oxygen-containing gas by nozzle pipes penetrating the wall of the meltdown gasifier. The ferrous material to be reduced is introduced into the fluidized bed. In order to be able to produce molten pig iron and liquid steel pre-products in a direct reduction process with a lower sulfur content than has hitherto been the case, without having to make any particular demands on the sulfur content of the coal used, the ferrous material to be reduced is supplied closely above the blow-in gas nozzle plane producing the fluidized bed. An arrangement for carrying out the process includes a meltdown gasifier in which charging pipes penetrating its wall are provided in the region of the fluidized-bed zone closely above the plane formed by the nozzle pipes. The ferrous material to be melted as well as the dusts separated from the reduction gas and, if desired, fluxes containing calcium oxide, magnesium oxide, calcium carbonate and/or magnesium carbonate are introduced therethrough.
REFERENCES:
patent: 3948645 (1976-04-01), Elvander et al.
patent: 4317677 (1982-03-01), Weber et al.
patent: 4504043 (1985-03-01), Yamaoka et al.
Andrews Melvyn J.
Korf Engineering GmbH
Voest-Alpine Atkiengesellschaft
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