Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1997-03-13
1999-08-17
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75448, 75500, C21B 1314, C22B 514
Patent
active
059388153
ABSTRACT:
An iron ore refining method in which a secondary reactor is employed for partly reducing iron ore and partly oxidizing a carbon containing substance to form partly reduced secondary iron ore, the coal char and a calorific containing carbon dioxide and carbon monoxide in a ratio of no less than about 0.25. The calorific gas is separated from the partly reduced secondary iron ore and the coal char and the resulting heated solids are introduced into the primary reactor without substantial cooling. All or part of the iron product is formed from the partly reduced iron ore produced in the primary reactor. Since the secondary reactor operates at a lower temperature than the primary reactor, part of the iron product is processed at a lower temperature to reduce oxygen requirements for the refining and to increase thermal efficiency.
REFERENCES:
patent: 3028231 (1962-12-01), Klemantaski et al.
patent: 5613997 (1997-03-01), Satchell, Jr.
Andrews Melvyn
Pace Salvatore P.
Rosenblum David M.
The BOC Company, Inc.
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