Patent ID: 6264724
Filing Date: 2001-07-24
Classification: C21B,Y02P

Abstract:
Method for producing sponge metal from charging materials comprising metal ore and optionally fluxes wherein a CO.sub.2, CO--, H.sub.2 - and tar containing feedgas from a first gas source comprising a melt-down gasifying zone (8) and a first reduction zone (12) is subjected to CO.sub.2 elimination and optionally to heating and an at least largely CO.sub.2 -free reducing gas is supplied to at least one further reduction zone (21) forming a further CO.sub.2, CO, nitrogen and tar containing gas source, to serve for the direct reduction of metal ore and which after reaction with the ore is withdrawn as an export gas and said export gas at least partially is also subjected to CO.sub.2 elimination as a recycle gas for the reduction zone (21), characterized in that both the feedgas from the first gas source (8, 12) and the recycle gas recycled from the reduction zone (21) are each subjected to CO.sub.2 elimination separately.