Primetals Technologies Austria Gmbh

Siemens Vai Metals Technologies Gmbh

Posco

Siemens Vai Metals Technologies Gmbh & Co.

Voest-alpine Industrieanlagenbau Gmbh & Co.

Robert Millner

Norbert Rein

Jan-Friedemann Plaul

Johann Wurm

Kurt Wieder

Gerald Rosenfellner

Thomas Eder

Johannes Leopold Schenk

Guenter Peer

Franz Hauzenberger

Hado Heckmann

Karl Zehetbauer

Andreas Scherney

Martin Schmidt

Hanspeter Ofner

Georg Aichinger

Leopold Werner Kepplinger

Myoung-Kyun Shin

Bogdan Vuletic

Franz Berner

Sang-Hyun Kim

Sang-Hoon Joo

Christian Boehm

Reinhard Redl

Herbert Schmid

Andreas Zobernig

Min-Chul Park

Jan Friedemann Plaul

Kurt Lukschander

Harald Sprenger

Ulrike Schmidt

Johannes Rothberger

Hans Thomas Sattler

Bernhard Rummer

Chong Won Choi

Thomas Bürgler

Andreas Steinwandter

Jan-Freidemann Plaul

Alois Gstoettenmayr

Helmut Siegl

Seok Min Yoon

Stephan Lackner

Sang Hoon c/o Posco Joo

Gu c/o Posco Lee

Jin Tae c/o Posco Kim

Myoung Kyun c/o Posco Shin

Sang Hyun c/o Posco Kim

Wan Gi c/o Posco Kim

Hoo Geun c/o Posco Lee

Chang Oh Kang

Deuk Chae c/o Posco Kim

Gi Woong Kwon

Daelyul Kwon

The invention relates to a method for sealing a reduction assembly, wherein the reduction assembly has a product discharge device, wherein the product discharge device is supplied with sealing gas and wherein at least one compressor is provided for delivering prepared sealing gas to the product discharge device, wherein according to the invention, at least one nitrogen generator is provided for producing pure sealing gas, and wherein the sealing gas for supplying to the product discharge device is composed of pure sealing gas from the at least one nitrogen generator or composed of pure sealing gas from the at least one nitrogen generator and of prepared sealing gas from the at least one compressor. The invention also relates to a device with which the method according to the invention is carried out.

Sealing a reduction assembly

A method of direct reduction of metal oxides that includes catalytic reforming of hydrocarbonaceous gas in a reformer to obtain reformer gas, obtaining at least one precursor gas based on the reformer gas, preparing a reduction gas by heating the at least one precursor gas by means of electrical energy, at least a portion of the electrical energy being introduced by means of plasma.

Process and apparatus for direct reduction with electrically heated-up reduction gas

The invention relates to a process for producing carburized directly reduced iron sponge from iron oxide material. Firstly, direct reduction is carried out by means of a reduction gas consisting at least predominantly of Hand the carbon content in the iron sponge is then increased by means of a carburizing gas which is fed in, after which used carburizing gas is at least partly taken off while largely avoiding mixing with the reduction gas. The plant for producing carburized directly reduced iron sponge from iron oxide material comprises a reduction zone for directly reducing introduced iron oxide material to directly reduced product by means of reduction gas consisting predominantly of Hand a reduction gas feed conduit opening into the reduction zone. It also comprises a carburization zone having a carburizing gas feed conduit opening into the carburization zone and a carburization offgas conduit.

Method for carburization of HDRI produced in H2 based direct reduction process

A method for the direct reduction of feedstock, containing metal-oxide, to form metallic material, by contact with hot reduction gas in a reduction assembly (): the product of the direct reduction process is discharged from the reduction assembly by a product discharge apparatus, which is flushed with seal gas, drawn off from the vent gas and subsequently dedusted. At least one portion of the dedusted vent gas is used as a combustion energy source during the production of the reduction gas, and/or as a component of a furnace fuel gas during a combustion process for heating the reduction gas, and/or as a component of the reduction gas. Apparatus for carrying out the method is disclosed.

Method for direct reduction using vent gas

A method for direct reduction of metal oxide-containing starting materials to produce metallized material by contact with hot reduction gas in a reduction unit (), wherein the product of the direct reduction is discharged from the reduction unit () by means of a product discharge device () which is flushed with seal gas and from which vent gas is drawn and subsequently de-dusted. The vent gas is de-dusted dry and the content of at least one gaseous constituent is reduced by catalytic conversion or combustion. Also, a device for carrying out the method is disclosed.

Method and device for direct reduction with dry vent gas de-dusting

The invention relates to a method for reducing metal oxides to metallized material by means of contact with reduction gas, wherein an accumulated top gas is dry dedusted and reformed in a raw gas mixture together with gaseous hydrocarbons. The water vapor content of the dry dedusted top gas designated for the preparation of the raw gas mixture is adjusted in a saturator in the countercurrent by means of saturation water, wherein the temperature of the saturation water is adjusted, by mixing cold water with a hot water having a higher temperature than the cold water, in order to produce the saturation water at a target value. The invention further relates to a device for carrying out such a method, having corresponding conduits.

Reduction gas extraction from saturated top gas

A method for reducing metal oxide containing charge materials (): reducing the metal oxide containing charge materials () in at least two fluidized bed units (RA,RE) by means of a reduction gas (), wherein at least some of the resulting off-gas () is recycled and wherein the metal oxide containing charge materials () are conveyed into the fluidized bed unit RE by a propellant gas. Also, apparatus for carrying out the method according to the invention is disclosed.

Pneumatic ore charging

In a process and apparatus for the reduction of metal oxides () to form metalized material by contact with hot reducing gas, which is produced at least partially by catalytic reformation of a mixture of

[object Object]

A method and apparatus are disclosed for treating process water which is loaded with gaseous compounds and/or possibly with solids and comes from a wet-cleaning installation for cleaning process gas, e.g., from a melt-reduction subassembly or from a direct-reduction subassembly. Process water is introduced in a tank in a first process stage and degassed on the basis of reduced solubility of the dissolved compounds. The tank has, on its upper side, a gas-collecting chamber, in which the separated-off gases are collected and from which these are discharged. Likewise, the treated process water is discharged from the tank via a drainage means.

Method and apparatus for treating process water

In a process and apparatus for the reduction of metal oxides to form metalized material by contact with hot reducing gas, which is produced at least partially by catalytic reformation of a mixture of&#x2014;a gas containing carbon dioxide (CO) and/or steam (HO) with&#x2014;gaseous hydrocarbons, the fuel gas for burners which provide the heat for the endothermal reformation processes which take place during the reformation is obtained at least partially from a partial quantity of the top gas produced during the reduction of metal oxides to form metalized material, wherein this partial quantity of the top gas, before it is used as a component of the fuel gas, is firstly subjected to dedusting and then to a CO conversion reaction, and the conversion gas obtained during the CO conversion reaction is subjected to COremoval after cooling.

Reformer-gas-based reduction process with decarbonization of the fuel gas for the reformer

A method and a device for reducing iron-oxide-containing feedstocks, in which a reducing gas is fed to a reducing unit () containing the iron-oxide-containing feedstocks. The reducing gas is generated by introducing a process gas having reduction potential into a heating appliance () for heating the process gas, which is withdrawn as reducing gas therefrom. In the heating appliance (), heat energy is transferred to the process gas. The heat energy is formed by combustion of a fuel gas containing organic substances, including coke oven gas with addition of technically pure oxygen. The flames of the combustion have an adiabatic flame temperature of above 1000&#xb0; C., wherein, in the combustion of the fuel gas, at least some of the organic substances present in the fuel gas are cracked.

Method and device for reducing iron oxide-containing feedstocks

In a method and a device for operating a smelting reduction process, at least part of an export gas from a blast furnace or a reduction unit is thermally utilized in a gas turbine and the exhaust gas of this gas turbine is used in a waste heat steam generator to generate steam. The remaining part of the export gas is fed to a COseparation apparatus, the tail gas thereby obtained being fed to a waste heat steam generator and burned for additional steam generation. The combustible components of the tail gas are sent for thermal utilization in a steam generator, so that the overall energy balance of the thermal use of the export gas is improved. In addition, a further part of the export gas is qualitatively improved by the COseparation apparatus, so as to generate a high-quality reduction gas which can be supplied for metallurgical use.

Method and device for operating a smelting reduction process

A system for energy optimization in a plant () for producing direct-reduced metal ores (). The plant () has at least one reduction unit (), a device for separating gas mixtures () having an associated compressing device (), and a gas-heating device () upstream of the reduction unit (). Part of the process gases () is fed by a feed line from a smelting reduction plant to the plant for producing direct-reduced metal ores (). A turbine () is fit between the device for separating gas mixtures () and the gas-heating device () upstream of the reduction unit () such that a pressure drop between the device for separating gas mixtures () and the reduction unit () is converted into forms of energy that can be used to operate additional components () of the plant (), in particular electrical energy and/or mechanical energy. Energy consumption of the plant () is reduced.

System for energy optimization in a plant for producing direct-reduced metal ores

A method for introducing fine particulate material () of ferruginous particles into a fluidized bed reduction unit () having a fluidized bed (), wherein the temperature in the fluidized bed () is more than 300&#xb0; C., and wherein the fine particulate material () is introduced directly into the fluidized bed () and/or into a free space () above the fluidized bed () by means of a burner (). The method may be used for producing liquid pig iron () or liquid steel precursor products () by a smelting reduction process in a smelting reduction unit ().

Method and device for introducing fine particle-shaped material into the fluidised bed of a fluidised bed reduction unit

A melter gasifier of a smelting reduction installation is charged by bringing together coal -containing material in lump form and iron carrier material (which may be hot) before and/or while they enter the melter gasifier. The ratio of the combined amounts of iron carrier material and coal-containing material in lump form is variable. The combined amounts of iron carrier material and coal-containing material in lump form are distributed over the cross section of the melter gasifier by a dynamic distributing device, and the ratio of the combined amounts of the iron carrier material and coal-containing material in lump form is set depending on the position of the dynamic distributing device.

Method and device for charging coal-containing material and iron carrier material

Growing community of inventors

Loosdorf, Austria

Robert Millner