Voest-alpine Aktiengesellschaft

Voest-alpine Industrieanlagenbau Gmbh

Other

Research Institute of Industrial Science & Technology

Pohang Iron & Steel Co. Ltd.

Deutsche Voest-alpine Industrieanlagenbau Gmbh

Vereinigte Osterreichische Eisen- Und Stahlwerke-alpine Montan

Krautkraemer Gmbh

Deutsche Voest-alpine Industrieanlagenbav

Felix Wallner

Werner Leopold Kepplinger

Johannes Leopold Schenk

Leopold Werner Kepplinger

Johannes-Leopold Schenk

Udo Gennari

Il-Ock Lee

Walter Lugscheider

Franz Hauzenberger

Horst Wiesinger

Wilhelm Schiffer

Il Ock Lee

Ernst Eichberger

Othmar Puhringer

Walter Rockenschaub

Paul Freimann

Otto Ganglbauer

Adam Krier

Yong-Ha Kim

Rolf Hauk

Bogdan Vuletic

Michael Nagl

Roy Hubert Whipp, Jr

Hang Goo Kim

Peter Brandl

Siegfried Zeller

Yong Ha Kim

Sang Hoon Joo

Christian Bohm

Bong Jin Jung

Uoo Chang Chung

Sang Deok Lee

Reinhold Angerer

Johann Reidetschlager

Bernhard Rinner

Rainer Frielinghaus

Hermann Reindl

Helmut Scheidl

Gotthard Uckert

Josef Ausserwoger

Johannes-Leopold Schnek

Gyu-Dae Park

Werner-Leopold Kepplinger

Moon Duk Park

Walter-Rainer Kastner

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reducing gas is produced which is injected into reduction zones of the reduction stages ( ), is reacted there, is withdrawn as a top gas and optionally is supplied to a consumer.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 method of charging metal carriers which contain a portion of fines and are at least partially reduced and carbon carriers to a melter gasifier (,) in which a melt-down gasifying zone (,) is maintained, the metal carriers and the carbon carriers are fed into the melter gasifier (,) above the level of the melt-down gasifying zone (,) and descend to the melt-down gasifying zone (,) and travel through the same forming a metal melt and producing a reducing gas by coal gasification. In order to prevent a partial discharge of the metal carriers from the melter gasifier (,) during the charging of the same and to be able to achieve uniform distribution of the carbon carriers and the metal carriers, both the carbon carriers and the metal carriers are introduced into the melter gasifier centrally above the melt-down gasifying zone (,), preferably gravitationally, with a central strand (,) of metal carriers being formed which is peripherally surrounded by a jacket strand (,) formed by the carbon carriers.

Method of charging metal carriers to a melt-down gasifying zone

According to a process for injecting metal-oxide-containing fine particles into a reducing gas, a central material stream formed by the fine particles and a carrier gas is introduced into the reducing gas and at least one gas stream formed by a secondary gas is directed against the material stream to ensure an optimum contact of the fine particles with the reducing gas, the gas stream atomizing the material stream and the fine particles being evenly distributed within the reducing gas.

Method for blowing fine particles containing metal oxide into a reducing gas

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

An arrangement for the dosed introduction of fine-particulate material into a reactor vessel comprises a fluidized bed sluice, into which a material supply means enters from above and into which a gas duct feeding a fluidization gas runs in the lower end region thereof and which includes an overflow tube for conveying on the fine-particulate material. In order to introduce the fine-particulate material into the reactor vessel at specific zones, a plurality of independently connectable fluidized bed sluices are provided outside of the reactor vessel, the fluidized bed sluices having overflow tubes which project into the interior of the reactor vessel.

Arrangement for the dosed introduction of fine-particulate material into a reactor vessel

In a method of producing molten pig iron (,) or steel pre-products from lump ore which in at least one reduction zone is reduced to partially and/or completely reduced sponge iron (,) in a shaft furnace, the sponge iron (,) is melted down in a melt-down gasifying zone (,) of a melter gasifier (,) under supply of carbon-containing material (,) and oxygen and while simultaneously forming a reducing gas. To ensure that there will be a specific gap volume in the bed (,) of solid carbon carriers (,) even when charging fine-particle sponge iron (,) and hence that the bed (,) of solid carbon carriers (,) will be thoroughly flown through by gas, at least the sponge iron (,) is charged to the melt-down gasifying zone (,) discontinually, under formation of areas (,) of piled-up sponge iron which are embedded in the bed (,) of carbon carriers (,) and which are superposed and which are separated by solid carbon carriers (,), wherein each of the areas (,) of piled-up sponge iron while sparing a cross section zone (,) of the melt-down gasifying zone (,) extends over the cross section of the same and wherein the reducing gas forming the melt-down gasifying zone (,) flows past the areas (,) of piled-up sponge iron under melting of the same and upwards through the cross section zones (,) that are free from sponge iron and formed from carbon carriers (,), and flows through these zones.

Process for producing liquid pig iron or semifinished steel products from ore

Process for producing sponge iron

Process for producing sponge iron by direct reduction of

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

Fluidized bed type reduction apparatus for iron ores and method for

A conveying arrangement for the dosed conveyance of bulk material from one metallurgical vessel into another through a conveying channel. The conveying channel has an entry opening and a discharge opening. A conveyor worm is rotatably located in the conveying channel, extending at least from the entry opening to the discharge opening and including a first flight formed by a plurality of paddles. In order to be able to configure the conveyor worm as short as possible and to minimize gas streaming through the conveying channel, the conveyor worm, on its end associated with the discharge opening, has a second flight that is formed by a continuous helix extending at least over half a convolution.

Conveying arrangement for the dosed conveyance of bulk material

Growing community of inventors

Linz, Austria

Felix Wallner