Method of smelting reduction of ores containing metal oxides

Details Method of smelting reduction of ores containing metal oxides Method of smelting reduction of ores containing metal oxides

1989-09-01

1990-07-10

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75446, C21B 1100

Patent

active

049404881

ABSTRACT:
Metal oxide ore is subjected to smelting reduction to obtain the molten metal by a method which comprises prereducing said ore in solid state in a prereduction furnace, thereafter melting said ore and carrying out final reduction thereof in a smelting reduction furnace, and at the same time introducing gas generated in said smelting reduction furnace and having reductive capability into said prereduction furnace, the rate of prereducing said ore in said prereduction furnace being controlled at a value with a maximum of the order of 33 percent for raising the rate of utilization of energy to a maximum limit.

REFERENCES:
patent: 3028231 (1962-04-01), Klemantaski et al.
patent: 3936296 (1976-02-01), Campbell
patent: 4244732 (1981-01-01), Brauns
patent: 4566904 (1986-01-01), Von Bogdandy et al.
patent: 4874427 (1989-10-01), Hamada et al.

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