Primetals Technologies Austria Gmbh

Siemens Vai Metals Technologies Gmbh

Voest-alpine Industrieanlagenbau Gmbh & Co.

Siemens Vai Metals Technologies Gmbh & Co.

Hanspeter Ofner

Robert Millner

Johann Wurm

Norbert Rein

Wilhelm Schiffer

Harald Fischer

Ernst Oberndorfer

Johannes Leopold Schenk

Leopold Werner Kepplinger

Franz Hauzenberger

Gerald Rosenfellner

Konstantin Milionis

Siegfried Zeller

Johann Reidetschlager

Andreas Steinwandter

Bernhard Hiebl

Roland Eisl

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

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

Disclosed is a composite system that includes a reduction system for reducing oxides in a continuous process, a process assembly for manufacturing liquid metal in a discontinuous process, wherein a reduction product is fed from the reduction system to the process assembly, at least one buffer device for receiving the reduction product and further starting materials and also for charging the process assembly, and a conveyor system for transporting the reduction product from the reduction system into the at least one buffer device.

Conveyor system, composite system and method for coupling metallurgical methods

A conveying system comprising elements for conveying lumpy, particularly hot, conveying stock and a cover for shielding the conveying stock. Disclosed are measures for inerting the conveying stock. A combined system encompasses a reduction plant for reducing oxides in a continuous process and processing unit for producing liquid metal in a discontinuous process. The reduction product is deliverable from the reduction plant to the processing unit. A method for coupling a reduction method used for reducing oxides in a continuous process and a method used for producing liquid metal in a discontinuous process. A reduction product from the reduction method is fed to the liquid metal production method for processing.

In a process for reducing iron-ore-containing particulate material in at least a two-stage process, reducing gas is conducted through at least two reaction zones consecutively arranged in series and formed by a moving particulate material and the particulate material passes through the reaction zones in reverse order to the reducing gas, with the particulate material being heated in the reaction zone arranged first for the particulate material and being reduced in the further reaction zone. In order to achieve a maximum preheating temperature without any formation of magnetite, the reducing gas added to the first reaction zone is conditioned such that no or hardly any reduction takes place, although for the particulate material a preheating temperature within the fringe range of starting a reduction is achieved, whereby either the degree of oxidation of the reducing gas is increased or the temperature of the reducing gas is decreased or both measures are carried out jointly and whereby, in the reactor zone arranged second for the iron ore, a temperature level of at least about 600&#xb0; C., preferably in the range of between 600 and 700&#xb0; C., in particular of between 620 and 660&#xb0; C., is adjusted and the iron-oxide-containing material is reduced to wuestite ().

Method for reducing a particulate material containing a metal, especially iron ore

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Pucking, Austria

Hanspeter Ofner