Voest-alpine Industrieanlagenbau Gmbh

Deutsche Voest-alpine Industrieanlagenbau Gmbh

J&ouml;rg Diehl

Gerald Rosenfellner

Ernst Eichberger

Franz Reufer

G&uuml;nter Schrey

A plant for producing sponge metal, in particular sponge iron, from charging materials consisting of metal ore or iron ore respectively, preferably in lumps and/or pellets, and optionally fluxes, comprising at least one first gas source (,) dispensing a CO&mdash; and H,- containing feedgas, a CO,elimination plant (,) and optionally a heating means (,) for the feedgas from the first gas source (,) is provided with a reduction reaction (,) which forms a further gas source for a CO&mdash; and H,-containing feedgas and serves for receiving metal ore, a reducing-gas feed duct (,) leading to this reduction reactor (,) and an export-gas discharge duct (,) from said further reduction reactor (,), wherein a conveying duct (,) for at least a portion of the export gas formed in the reduction reactor (,) and serving as a feedgas is flow-connected with the reducing-gas feed duct (,) of the reduction reactor (,) via a CO,elimination plant and optionally a heating means. To increase economic efficiency, the plant is characterized in that at least two CO,elimination plants (,) are provided which are adapted to be connectable in parallel and at least one of which is connectable with the conveying duct (,) for the export gas that is produced in the reduction reactor (,) forming the further gas source and that is conducted as a recycle gas, and at least one CO,elimination plant (,) for the feedgas from the first gas source is provided and each of the CO,elimination plants is flow-connectable with the reduction reactor (,) forming the further gas source (FIG.,).

Process for the production of spongy metal

In a method for producing liquid pig iron or liquid steel pre-products from charging substances comprising iron ore, preferably in lumps or pellets, and optionally fluxes. The charging substances are directly reduced to sponge iron in a reduction zone (,) and the sponge iron is melted in a melt-down gasifying zone (,) under the supply of carbon carriers and oxygen-containing gas. CO-and H,-containing gas is introduced into the reduction zone (,) and is reacted there. An export gas is withdrawn and conducted to a consumer (,). The export gas is subjected to CO,removal or partial combustion and the resulting gas with CO,is introduced back into the reduction process. This is done to keep down the carbon carriers having high portion of C,as well as consumption of O,. A highly CO,-containing gas having a CO,content far in excess of the CO,content of the export gas, preferably exceeding 40%, and having a CO content that is far below the CO content of the export gas is introduced into the melt-down gasifying zone (,).

Growing community of inventors

Linz, Austria

Jörg Diehl

Growing community of inventors

Linz, Austria

J&ouml;rg Diehl

Jörg Diehl