Method of ore reduction with an arc heater

Details Method of ore reduction with an arc heater Method of ore reduction with an arc heater

C - Chemistry, Metallurgy

22

B

53/349

C22B 4/04 (2006.01) C21B 13/00 (2006.01) C21B 13/14 (2006.01) C22B 4/00 (2006.01) C22B 5/18 (2006.01)

Patent

CA 1057960

ABSTRACT OF THE DISCLOSURE A two-stage process for converting metal- bearing ore to a metal or an alloy characterized by the steps of, first, partially reducing an ore having a relatively higher valence state to an intermediate product of a lower valence and, second, treating the intermediate product in an arc heater having a carbon-bearing reductant atmosphere in an amount in excess of that required to reduce the intermediate product to the metal form, whereby to produce a substantially pure metal or an alloy, such as ferrochromium, and an unused excess reducing gas or deriva- tive thereof which are recirculated to the first step to assist in the partial reduction.

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