Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1991-07-26
1995-01-03
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75502, 266162, 266177, 266193, C21B 1310
Patent
active
053782607
ABSTRACT:
A process for continuously smelting iron ore by use of coal to yield molten iron or semi-steel is disclosed. The process comprises the steps of establishing a melt covered by slag; inducing the slag and the molten iron to flow countercurrently to one another, toward opposite ends of the smelter; maintaining iron oxide-reducing conditions in that zone of the smelter towards which the slag flows; maintaining carbon-oxidizing conditions in that zone of the smelter towards which the molten iron flows; continuously or semicontinuously tapping the slag from the reducing zone end of the smelter; continuously or semicontinuously tapping the molten iron from the oxidizing zone end of the smelter; and adding to both zones iron ore, coal, oxygen, and flux at addition rates sufficient to keep the molten iron in the reducing zone substantially saturated with carbon, maintain in the slag being tapped an FeO content of about 5 weight percent or less, and maintain in the molten iron being tapped a carbon content of about 0.5 to 5 weight percent. A slag dam preferably is included in the smelter, to impede the backflow of the slag from the reducing zone to the oxidizing zone. A metal bath dam with one or more flow-through portals also is preferably used, submerged below the slag dam, to impede the backflow of the hot metal.
REFERENCES:
patent: 714449 (1902-11-01), Carson
patent: 714451 (1902-11-01), Carson
patent: 1300410 (1919-04-01), Johnson
patent: 1886937 (1932-11-01), Brett
patent: 1992084 (1935-02-01), McGregor
patent: 2557651 (1951-06-01), Gilliland
patent: 2740710 (1956-04-01), Johannsen
patent: 2758022 (1956-08-01), Jordan
patent: 3022157 (1962-02-01), Huntington
patent: 3275432 (1966-09-01), Alexandrovsky
patent: 3326671 (1067-06-01), Worner
patent: 3752663 (1973-08-01), Worner et al.
patent: 4358094 (1982-11-01), Megerle et al.
patent: 4358311 (1982-11-01), Weigel et al.
patent: 4362561 (1982-12-01), Weigel et al.
patent: 4798624 (1989-01-01), Brotzmann et al.
patent: 4913734 (1990-04-01), Romenets et al.
Queneau/The QSL Reactor for Lead and iIts Prospects for Ni, Cu and Fe,/Jom p. 30-35, Dec. 1989.
Ibaraki et al. 49th Ironmaking Conference Proceedings/pp. 631-638/Mar. 1990/ Detroit.
Queneau, Paul, Direct Steelmaking-Quo Modo?, Iron and Steelmaker (Dec. 1990) at 76.
Fukuzawa, Akira, Continuous Steelmaking Process: Research and Future, 27 Transactions of National Research Institute for Metals 81 (1985).
Ibaraki, Tetsuharu, et al., Development of Smelting Reduction of Iron Ore-An Approach to Commercial Ironmaking, 49th Ironmaking Conference Proceedings, Detroit (Mar. 1990).
Falcon Foundry Co., Copper Water Cooled Panels for Electric Furnaces, Metal Producing, vol. 29, (Mar. 1991) at 67.
Cox James H.
Elliott, deceased John F.
Fruehan Richard J.
Andrews Melvyn J.
Davis Tyrone
Glenn Hugh W.
Moser William R.
The United States of America as represented by the Department of
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