C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/154, 53/240
C22B 1/00 (2006.01) C01G 49/10 (2006.01) C22B 1/06 (2006.01) C22B 1/08 (2006.01) C22B 21/00 (2006.01) C22B 34/12 (2006.01)
Patent
CA 1134149
A B S T R A C T "MOVING BED CHLORINATION OF BAUXITE AND ILMENITE" A process for the selective removal of iron from a ferruginous ore which comprises feeding the dried heated ore into a countercurrent reactor comprising a sulphidizing zone, an intermediate zone and a chlorination zone, through which zones the ore moves in sequence and wherein (a) in the sulphidizing zone, a reductant is introduced and the iron values present in the ore react selectively with sulphur and/or volatile sulphur- containing compounds in the presence of the reductant to form iron sulphides; (b) in the intermediate zone, volatile ferric chloride formed in the chlorinating zone is introduced and reacts with the sulphidized ore to convert the iron sulphides into ferrous chloride and reform the sulphur and/or volatile sulphur containing compounds; (c) in the chlorination zone, chlorine is introduced and converts the ferrous chloride formed in the intermediate zone into volatile ferric chloride; (d) the volatile iron chlorides and the upgraded host oxide are separately removed from the chlorination zone; and (e) any volatile host chloride produced rises from the intermediate zone back to the sulphidizing zone where it meets the incoming ore, and is reconverted to host oxide.
329914
Foley Ernest
Wadsley Michael W.
Commonwealth Scientific And Industrial Research Organization
Kirby Eades Gale Baker
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