Voest-alpine Industrieanlagenbau Gmbh

Research Institute of Industrial Science & Technology

Pohang Iron & Steel Co. Ltd.

Korf Engineering Gmbh

Other

Voest-alpine Aktiengesellschaft

Voest-alpine Akt.

Deutsche Voest-alpine Industrieanlagenbau Gmbh

Metallgesellschaft Aktiengesellschaft

Chemie Linz Aktiengesellschaft

Brifer International Ltd.

Deutsche Voest-alpine

Deutsche Voest-alpine Industrienalagenbau Gmbh

Voest-alpine Atkiengesellschaft

Werner Leopold Kepplinger

Felix Wallner

Johannes Leopold Schenk

Rolf Hauk

Johannes-Leopold Schenk

Gero Papst

Dieter Siuka

Panajiotis Matzawrakos

Christian Bohm

Il-Ock Lee

Il Ock Lee

Michael Nagl

Udo Gennari

Walter Rockenschaub

Klaus Langner

Leopold Seirlehner

Yong-Ha Kim

Johann Wurm

Franz Hauzenberger

Roy Hubert Whipp, Jr

Horst Sulzbacher

Hang Goo Kim

Kurt Stift

Sang Hoon Joo

Ludwig Von Bogdandy

Yong Ha Kim

Sang Deok Lee

Bong Jin Jung

Uoo Chang Chung

Friedrich Lunzer

Gerhard Kruger

Johannes-Leopold Schnek

Erich Ottenschlager

Gyu-Dae Park

Moon Duk Park

Rodgan Vuletic

Herbert Mayr

Gerald Kern

Bodgan Vuletic

In a method for producing liquid pig iron ( ) or steel pre-products from fine-particulate iron-containing material ( ) in a melter gasifier ( ), the iron-containing material ( ) is melted in a bed of solid carbon carriers ( ) under supply of carbon-containing material ( ) and oxygen-containing gas, at the simultaneous formation of a reducing gas, wherein the fine-particulate reduced material ( ) and oxygen are introduced into the bed ( ) from the side. To be able to charge the fine-particulate iron-containing material to the melter gasifier ( ) without a need for briquetting and, in doing so, avoid discharging of the fine-particulate iron-containing material ( ) by the reducing gas formed in the melter gasifier ( ), a fluidized bed ( ) of fine-particulate solid carbon carriers ( ) and fine-particulate iron-containing reduced material ( ) is maintained above a fixed bed ( ) formed of solid carbon carriers ( ) and the fine-particulate reduced material ( ) is charged into the fluidized bed ( ) directly, in immediate contact with oxygen, preferably in the form of a strand having a ring-shaped cross-section and peripherally surrounding an oxygen jet and enclosing the oxygen, such that the oxygen is enclosed by the supplied fine-particulate reduced material ( ), and the fine-particulate reduced material ( ) is melted in the fluidized bed (FIG. ).

Process for producing liquid pig iron or semifinished steel products from iron-containing materials

In the process for the production of liquid pig iron ) or liquid steel pre-products from charging substances comprising iron ore ( ) and fluxes and at least partially containing a portion of fines, the iron ore is directly reduced to sponge iron in at least two reduction stages ( ) by the fluidized bed method, the sponge iron is melted in a melt-down gasifying zone ( ) under the supply of carbon carriers and an oxygen-containing gas, and a CO- and H -containing reducing gas is produced which is injected into reduction zones of the reduction stages ( ), is reacted there, is withdrawn as a top gas and optionally is supplied to a consumer. To achieve uniform reduction of the iron ore at optimum exploitation of the reducing gas, the iron ore ( ) in a first reduction stage ( ) by aid of the reducing gas is fractionated into at least two fractions having different grain size distributions each, each fraction is reduced by the reducing gas in a separate fluidized bed ( ), wherein the reducing gas maintains a first fluidized bed ( ) containing the coarse-grain fraction and separates the fine-grain fraction from the same, and wherein, further, reducing gas is additionally introduced into the further fluidized bed ( ) directly reduced iron ore ( ) is discharged both from the first and from the further fluidized bed ( ) and the fine- and the coarse-grain fraction reduced in the first reduction stage ( ) are further reduced in at least one further reduction stage ( ) operating in the same manner as the first reduction stage ( ) and from the last reduction stage ( ) the fine-grain fraction is introduced into the melt-down gasifying zone ( ) while being agglomerated by provision of oxygen, and the coarse-grain fraction is fed directly into the melt-down gasifying zone ( ) gravitationally (FIG. 1).

Process for the production of liquid pig iron or liquid steel pre-products

In a process for producing molten pig iron or steel preproducts from fine-particulate iron containing material in a meltdown gasifying zone of a melter gasifier, under the supply of carbon-containing material and oxygen-containing gas at the simultaneous formation of a reducing gas in a bed formed of solid carbon carriers, the iron-containing material is melted when passing the bed. In order to be able to work with a charge consisting of fine ore by up to 100%, yet reliably avoid discharging of the fine ore supplied, a supply duct for fine-particulate coal, such as coal dust and/or other carbon-containing materials including volatile portions, and a duct feeding an oxygen-containing gas enter in the vicinity of the reducing-gas discharge duct of the melter gasifier, the fine-particulate coal and/or other carbon-containing materials including volatile portions are reacted to fine-particulate coke upon introduction into the melter gasifier, the fine-particulate coke is discharged along with the reducing gas carried off the melter gasifier and is separated in a separating means.

Process for producing liquid pig iron or intermediate steel products and installation for implementing it

In a method for treating particulate material in the fluidized bed method, the particulate material is maintained in a fluidized bed by a treating gas flowing from bottom to top and thereby is treated. To minimize the consumption of treating gas and to reduce entrainment of fine particles by the treating gas, a particulate material having a wide grain distribution and a relatively high portion of fines is used for treatment and the treating gas in the fluidized bed is maintained at a superficial velocity less than the velocity required for fluidizing the largest particles of said particulate material.

Method for treating particulate material in the fluidized bed method and vessel and plant for carrying out the method

With a method for producing liquid metal from charging substances containing ore and of fluxes, the ore is directly reduced to sponge metal in at least one reduction zone (,), the sponge metal is melted along with fluxes in a melt-down gasifying zone (,) under the supply of carbon carriers and an oxygen-containing gas. A CO- and H,-containing process gas serving as a reducing gas is produced, fed into the reduction zone (,), reacted there, and subsequently withdrawn, wherein slagforming fluxes, in particular calcium carbonate, dolomite etc., gas are calcined by the process gas in a calcining zone (,&prime;) that is separate from the reduction zone (,) and melt-down zone (,). To be able to employ slagforming fluxes of any desired grain and without disturbances of the reduction process, the calcining zone (,&prime;) is connected in parallel to the reduction zone (,) with respect to the material flow and the calcined fluxes are fed into the melter gasifier (,) directly.

Process for producing liquid metal and facilities for carrying out the process

Process for producing sponge iron

Process for reducing ore fines and arrangement for carrying out the

Method for injecting fine iron ore in smelting reducing process

Process for producing molten pig iron of liquid steel preproducts and

Process for the production of molten pig iron or steel pre-products and

Process and plant for avoiding metal dusting in the direct reduction of

Fluidized bed type reduction apparatus for iron ores and method for

A process for producing molten pig iron or molten steel pre-products from charging substances formed of iron ores and fluxes and at least partially comprising fines, wherein the charging substances are directly reduced to sponge iron in at least one reduction zone by the fluidized layer process, the sponge iron is melted in a melting-gasifying zone under supply of carbon carriers and oxygen-containing gas, and a CO and H.sub.2 -containing reducing gas is produced, which is injected into the reduction zone, is reacted there, is withdrawn as an export gas and is supplied to a consumer, is to be improved with a view to rendering feasible the use of fine ore in an economic manner. This is effected in that

Process for producing molten pig iron or molten steel pre-products

Plant for producing molten pig iron or molten steel pre-products

Growing community of inventors

Leonding, Austria

Werner Leopold Kepplinger