| 摘要 |
Disclosed is a method for recovering a metal or metal alloy, in particular a ferro-alloy, by reduction of a metal oxide in a reduction zone formed by a coal bed by passing a reducing gas through the reduction zone. To obtain a metal that has a high affinity of oxygen, lumpy oxidic charging material is guided under the action of gravity through the coal bed consisting of three static bed layers, wherein a bottom layer of degassed coal covering a liquid sump of reduced metal and slag is provided. Furthermore, oxygen or an oxygen-containing gas is fed into a middle layer to form a hot reducing gas consisting essentially of CO, and combustion gases of carbon particles and oxygen or oxygen-containing gas are fed into a top layer. |
