C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/347
C22B 5/02 (2006.01) C22B 4/00 (2006.01) C22B 5/10 (2006.01) C22B 5/12 (2006.01) C22B 5/16 (2006.01) C22B 7/02 (2006.01) C22B 9/20 (2006.01) C22B 9/22 (2006.01)
Patent
CA 1147558
ABSTRACT TITLE: "METHOD OF RECOVERING VOLATILE METALS FROM MATERIAL CONTAINING METAL OXIDES" A method of reducing and recovering volatile metal from metal oxides comprising the steps of injecting metal oxide-containing material into a shaft reactor, simultaneously injecting reducing agent into said reactor, continuously maintaining said reactor substantially filled with coke, supplying thermal energy to the reactor, preferably by means of a plasma burner, such that at least some of the metal oxides are reduced to metal and melted or volatilized depending upon whether the metal is volatile. The melted metal is removed from the bottom of the reactor while the volatilized metal is permitted to flow upwardly through the shaft reactor in the form of metal vapour together with a gas flow. The coke in the shaft reactor through which the volatilized metal passes is maintained at a temperature in excess of 1000°C, thus screening the upper portion of the shaft reactor and the reactor top by means of the coke so as to prevent condensation of the volatilized metal.
364988
Fetherstonhaugh & Co.
Skf Steel Engineering Aktiebolag
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