Polysius Ag

Karl Krutzner, Jr

Otto Heinemann

Heinz-Herbert Schmits

Horst Ritzmann

Wolfgang Rother

Wolf Goldmann

Jurgen Wurr

Werner Schossler

Hans Mollenkopf

Georg Schepers

Paul Weber

Kurt Henning

Fine-grained material such as raw ground cement adapted to be fired in a rotary tube furnace is introduced to a vertical preheater and falls through a heating zone located at a level below the level at which the material enters the preheater. A stream of air enters the preheater at a level below the heating zone and passes upwardly at sufficient velocity to entrain the material that has passed through the heating zone, thereby causing such material to pass again through the heating zone. From the preheater the material is delivered to the furnace for final firing.

Methods and apparatus for the heat treatment of fine-grained materials

Fine-grained material such as raw ground cement adapted to be fired in a rotary tube furnace is introduced to a vertical perheater and falls through a heating zone located at a level below the level at which the material enters the preheater. A stream of air enters the preheater at a level below the heating zone and passes upwardly at sufficient velocity to entrain the material that has passed through the heating zone, thereby causing such material to pass again through the heating zone. From the preheater the material is delivered to the furnace for final firing.

Growing community of inventors

Neubeckum, Germany

Karl Krutzner, Jr