Method of recovering metals and metal alloys and a plant...

Details Method of recovering metals and metal alloys and a plant... Method of recovering metals and metal alloys and a plant...

C - Chemistry, Metallurgy

22

B

39/3, 53/352

C22B 5/12 (2006.01) C21B 13/00 (2006.01) C22B 5/10 (2006.01) F27B 1/10 (2006.01)

Patent

CA 1324265

ABSTRACT OF THE DISCLOSURE Disclosed is a method for recovering a metal or metal alloy in particular a ferro-alloy, by reducing a metal oxide in a reduction zone formed by a coal bed with a reducing gas. To obtain a metal having a high affinity to oxygen, the coal bed is formed by three static bed layers including a bottom layer of degassed coal covering a liquid sump of reduced metal and slag, a middle layer and a top layer. Oxygen or an oxygen- containing gas is blown into the middle layer to form a hot reducing gas, and at a distance thereabove, fine-grain oxidic charging material is introduced into the middle layer. A combustion gas of carbon particles and oxygen or oxygen- containing gas is fed into the top layer.

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