Two-stage ferrosilicon smelting process

Details Two-stage ferrosilicon smelting process Two-stage ferrosilicon smelting process

1989-03-20

1990-02-06

Andrews, Melvyn J.

Alloys or metallic compositions

Silicon base alloy containing metal

420581, 75 1022, 75 1038, 75 1044, 75 1063, 75 38, 266185, C22C 3300

Patent

active

048987123

ABSTRACT:
The present invention relates to a process for the production of ferrosilicon in a closed two-stage reduction furnace. In the present invention, carbon monoxide released as a result of the smelting process, in the first stage of the furnace, is used to prereduce higher oxides of iron, for example Fe.sub.2 O.sub.3 and Fe.sub.3 O.sub.4, contained in a second stage of a furnace, to iron monoxide (FeO). The iron monoxide is then used as a feed material to the first stage of the furnace. The use of a closed furnace and a pre-reduction process results in substantial energy savings in the production of ferrosilicon alloy.

REFERENCES:
patent: 1171719 (1916-02-01), Harrison
patent: 3140168 (1964-07-01), Halley et al.
patent: 4526612 (1985-07-01), Eriksson et al.

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