VERFAHREN UND ANLAGE ZUR GEWINNUNG VON METALLEN BZW. METALLEGIERUNGEN

摘要

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 oxygencontaining 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 oxygencontaining gas is fed into the top layer.