Thermal reduction process of aluminum

Details Thermal reduction process of aluminum Thermal reduction process of aluminum

C - Chemistry, Metallurgy

22

B

53/242

C22B 21/02 (2006.01) C22B 4/02 (2006.01)

Patent

CA 1107078

ABSTRACT The thermal reduction process for producing metals such as aluminum in a reactor utilizes a dispersed discharge to provide the heat of reaction within the reaction zone in the presence of aluminum vapor to maintain the temperature in excess of 2000°C. The aluminum oxide powder and a reductant in a gaseous medium are introduced with a tangen- tial component into the reactor to create a vortex motion. A minimum turbulence level within the reactor in the reaction zone is maintained so as to keep the solid particles in suspension and prevent the dispersed discharge from forming electrical arcs. Aluminum oxide is reduced to aluminum vapor which is removed with the effluent stream of gases from the reaction zone. Thereafter, the effluent is rapidly passed through a condenser where the temperature is dropped to liquefy the aluminum vapor which is then discharged in a continuous stream. The effluent stream is monitored for unreacted carbon or aluminum oxide and this information is fed back to the reactor for controlling the input of the starting materials.

318916

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