Primetals Technologies Austria Gmbh

Bernhard Hiebl

Johann Wurm

Norbert Rein

Hanspeter Ofner

Hans Herbert Stiasny

Stephan Hattinger

Roland Eisl

Thomas Wolfinger

Stefan Hötzinger

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

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Wilhering, Austria

Bernhard Hiebl