A two-stage ferrosilicon smelting process

Details A two-stage ferrosilicon smelting process A two-stage ferrosilicon smelting process

C - Chemistry, Metallurgy

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C

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C22C 33/04 (2006.01) C22C 33/00 (2006.01) C22C 33/06 (2006.01) C22C 35/00 (2006.01)

Patent

CA 2012011

A TWO-STAGE FERROSILICON SMELTING PROCESS 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, Fe2O3 and Fe3O4, 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.

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