C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/47, 53/48
C22B 4/00 (2006.01) C22B 5/04 (2006.01) C22C 33/00 (2006.01)
Patent
CA 1188104
ABSTRACT Elemental metal is produced from a metal oxide by forming an ignitable mixture containing the metal oxide and at least one metallic reducing agent therefore, and igniting the mixture to cause the mixture to react whereby to produce a molten metal phase covered by a slag phase. While the slag phase remains liquid but after burnout of the reaction, at least one pair of electrodes is introduced into the slag phase and an alternating current is passed through the slag phase between the electrodes to heat and simultaneously agitate the slag phase so as to induce further reaction of residual metal oxide therein, whereby elemental metal liberated from the metal oxide migrates to the metal phase. Additional metallic reducing agent is added to the slag phase at an empirically determined rate during the heating thereof, until substantially complete trans- formation of all the metal oxide remaining in the slag phase and migration of the resulting metal into the metal phase.
402856
Continental Alloys S.a.
Swabey Ogilvy Renault
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