Metallgesellschaft Aktiengesellschaft

Detlev Schlebusch

Martin Hirsch

Harry Serbent

Wolfram Schnabel

Fred Erich Cappel

Hermann Schmidt

Gerhard Reuter

Norbert Magedanz

Hans-Joachim Werz

Fred Stieler

Jurgen Otto

Walter Gerlach

Heiko Weisel

A sinterable mixture comprising iron-containing materials and solid fuel is sintered on a sintering machine; to decrease the rate at which exhaust gas is to be removed and to produce a desirable sinter, a part of the exhaust gas is enriched to an oxygen content of up to 24% by the addition of higher-oxygen gases and is then recirculated as a recycle gas, and exhaust gas is removed as a tail gas from the process only at a rate which corresponds to the rate of the gas which is formed during the sintering process plus the rate of the gas added for enriching plus the rate of inleaked air which has infiltrated from the outside minus the rate of oxygen consumption.

Process for sintering iron oxide-containing materials on a sintering

In the treatment of bulk materials with hot gases below the melting point of the charge component it is desired to prevent a formation of undesired crusts during normal operation and when the rotary kiln is operated at a reduced speed during short-time trouble. For this purpose, a controlled dissipation of heat is effected in several sections of the rotary kiln in that the shell of the kiln and the refractory lining are cooled so that the temperature of that portion of the inside surface of the rotary kiln which is submerged below the charge is always maintained at or up to 50.degree. C. below the temperature of the charge disposed thereover.

Process of thermally treating bulk materials in a rotary kiln

Growing community of inventors

Wollstadt, Germany

Detlev Schlebusch