C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/243
C22B 21/02 (2006.01) C22B 21/06 (2006.01) F27B 1/08 (2006.01)
Patent
CA 1212241
ABSTRACT PROCESS FOR CARBOTHERMIC REDUCTION OF ALUMINA In a carbothermic process for producing aluminum, alumina and carbon are reacted in a furnace to produce aluminum contaminated with aluminum carbide. A charge material (28) including carbon is subjected to back reactions of vapors and gases passing upwardly therethrough and is transferred to the hearth (13) of the furnace (10) where it reacts with a molten slag layer (23) containing alumina to produce an aluminum product as a separate liquid layer (25). At least part of the alumina necessary to form the aluminum product may be supplied to the hearth without being subjected to the back reactions, for example by being transferred with slag (38) from a secondary decarbonizing furnace (30) to which alumina is directly fed. The reduction reaction on the hearth (13) may result in an aluminum product having a carbide content of 20 - 37%, which can be reduced to 4 - 15% in a subsequent reaction on the same hearth in the absence of both reactive carbon and of solid aluminum carbide, and still further to about 2% in the secondary furnace (30).
427369
Reynolds Metals Company
Ridout & Maybee Llp
LandOfFree
Process for carbothermic reduction of alumina does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for carbothermic reduction of alumina, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for carbothermic reduction of alumina will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1261041