Primetals Technologies Austria Gmbh

Siemens Vai Metals Technologies Gmbh

Posco

Norbert Rein

Robert Millner

Jan-Friedemann Plaul

Thomas Eder

Johann Wurm

Karl Zehetbauer

Franz Hauzenberger

Gerald Rosenfellner

Andreas Scherney

Kurt Wieder

Hanspeter Ofner

Jan Friedemann Plaul

Johannes Leopold Schenk

Martin Schmidt

Myoung-Kyun Shin

Bogdan Vuletic

Georg Aichinger

Jun-Hyuk Lee

Franz Berner

Sang-Hyun Kim

Dong-Won Kim

Jan-Freidemann Plaul

Bernhard Hiebl

Roland Eisl

Daelyul Kwon

Gi Woong Kwon

Thomas Wolfinger

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 method for the direct reduction of oxidic iron carrier particles to a reduction product in a fluidized bed through which a reduction gas containing 30-100 mol % hydrogen Hflows in crossflow. At least 90% by mass of oxidic iron carrier particles introduced into the fluidized bed have a particle size of less than or equal to 200 micrometers. The superficial velocity U of the reduction gas flowing through the fluidized bed is set between 0.05 m/s and 1 m/s such that, for the particle size d equal to dof the oxidic iron carrier particles introduced into the fluidized bed, it is above the theoretical suspension velocity Uand is less than or equal to U.

Method for direct reduction in a fluidized bed

Provided is a method for manufacturing reduced iron which includes the steps of: i) drying ores in an ore drier; ii) supplying the dried ores to at least one reduction reactor; iii) reducing the ores in the at least one reduction reactor and manufacturing reduced iron; iv) discharging exhaust gas by which the ores are reduced in the reduction reactor; v) branching the exhaust gas and providing the branched exhaust gas as ore feeding gas; and vi) exchanging heat between the exhaust gas and the ore feeding gas and transferring the sensible heat of the exhaust gas to the ore feeding gas. In the supplying the dried ores to the at least one reduction reactor, the dried ores are supplied to the at least one reduction reactor by using the ore feeding gas.

Method for manufacturing reduced iron

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

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

A device for closed-loop control of process gases () in a plant () for producing directly reduced metal ores includes at least one reduction unit (), an appliance upstream of the reduction unit () for separating gas mixtures (), a gas purification appliance () connected downstream of the reduction unit () for rate control of process gases (). Process gases () are obtained by recycling from the production process itself and from a plant for pig iron generation () via a supply conduit (). An open-loop pressure control appliance () upstream of a junction of the supply conduit () into a return conduit () for the process gases () such that a pressure level for the appliance for separating gas mixtures () is kept constant and the process gases () are controlled in a closed-loop manner in a plant for producing directly reduced metal ores ().

Device for the closed-loop control of process gases in a plant for producing directly reduced metal ores

A method is provided for producing pressed articles which contain direct-reduced, fine particulate iron (direct reduced iron, DRI) from a fluidized bed reduction system for direct reduction of fine particulate iron ore, wherein direct-reduced, fine particulate iron produced in the fluidized bed reduction system during direct reduction is compacted into pressed articles. Dry, fine particulate material containing at least fine particulate iron ore and optionally fine particulate iron and carbon is admixed to the direct-reduced fine particulate iron and the mixture thus obtained is subsequently compacted into pressed articles. An apparatus for carrying out such method is also provided.

Process and apparatus for producing pressed articles

A process and a device for charging a primary product for pig iron into a smelting unit are provided. According to the process and device, some of the primary product that has been formed by reducing oxidic iron carriers is stored in the hot state in a reservoir tank before being supplied into the storage device or charging device that is directly connected to the smelting unit.

Process and device for charging into a smelting unit

A process and an apparatus for reducing charge materials containing iron ore or for producing pig iron or liquid primary steel products in a smelting unit are provided, the charge materials being at least partially reduced in at least one reduction unit by means of a reducing gas and optionally at least some of the at least partially reduced charge materials being melted in a smelting unit while supplying coal or coke and gas containing oxygen, while simultaneously forming the reducing gas, and the reducing gas or a reducing gas generated externally being supplied to the reduction unit. In the event of an interruption in the production of pig iron or primary steel products, the at least one reduction unit is emptied and the at least partially reduced charge materials are introduced into at least one vessel and kept under a non-oxidizing shielding gas atmosphere.

Process and apparatus for reducing charge materials containing iron ore or for producing pig iron or liquid primary steel products

In a method and an apparatus for separating at least one gaseous component from a waste gas of an installation for producing liquid pig iron, liquid primary steel products or sponge iron, in a first step, a stream of the waste gas passes through at least one adsorption separator at a first pressure, whereby the gaseous component is largely separated from the waste gas and, in a second step, the gaseous component is largely removed from the adsorption separator at a second pressure, which is lower than the first pressure. The method and apparatus are maintenance-free, cause low investment and energy costs and has a lower space requirement by a method in which the second pressure or the desorption pressure is generated by at least one jet pump, which is fed a stream of a propellant gas at a third pressure, which is higher than the second pressure.

Method and apparatus for separating a gaseous component

In a method for the production of molten metal, oxygen, a reducing agent and iron reduced in a reduction reactor are introduced into a melt gasifier, the reducing agent is gasified with oxygen and the reduced iron is melted by the heat which occurs, the cupola gas being used as at least a fraction of the reduction gas. Reacted top gas is drawn off from the reduction reactor. For increased efficiency at least part of the heat energy of the top gas and/or of the fraction of the reduction gas which is provided for use as cooling gas and as excess gas to be utilized for the indirect heating of at least one further gas used in the method.

Growing community of inventors

Vienna, Austria

Norbert Rein