Abstract: The invention relates to a process for producing directly reduced iron, liquid pig iron and steel, in which charge materials, which are formed from iron ore, preferably in lump and/or pellet form, and, if appropriate, additions, are reduced directly, in a first reduction zone, to form iron sponge, the iron sponge is smelted in a melter gasifier zone supplied with carbon carriers and oxygen-containing gas, to form liquid pig iron, and a reduction gas is generated, which gas, after off-gas cleaning, is introduced into the first reduction zone, where it is converted and drawn off as top gas, and in which process the top gas is subjected to off-gas cleaning, if appropriate is fed to a further reduction zone for direct reduction of iron ore to form iron sponge and, following reaction with the iron ore, is drawn off as export gas and is subjected to off-gas cleaning, and in which process the liquid pig iron and, if appropriate, the iron sponge from the further reduction zone are fed to a steelmaking process, in par

Abstract: In a method of producing molten pig iron (13) or molten steel pre-products from charging substances formed of iron ore (4), preferably in the shape of lumps and/or pellets, and optionally of fluxes (5), the charging substances are directly reduced to sponge iron in a reduction zone (2), the sponge iron is charged into a melt-down gasifying zone (12) and, there, is melted under the supply of carbon carriers (10) and an oxygen-containing gas, wherein a CO—H2-containing reducing gas is generated that is withdrawn from the melt-down gasifying zone (12) and introduced into the reduction zone (2), is reacted there and is withdrawn as a topgas, wherein the topgas is subjected to scrubbing and the sludges thus separated are at least partially agglomerated. To utilize the agglomerates thus formed while expending as little energy as possible, the agglomerates are recirculated into the reduction zone (2).

Abstract: In a method of effectively utilizing dusts incurring in the reduction of iron ore by means of a reducing gas and separated on that occasion in a scrubber in the form of sludges, the sludges at first are dehydrated and are used as starting materials for the production of cement (FIG. 1).