Daniel A Wilbert, Age 4412 Lamp Post Ln, Cherry Hill, NJ 08003

4378244, Mar 29, 1983

Nov 3, 1981

6/317939

James A. Kennelley - Larchmont NY
Geoffrey N. Boulter - New York NY
Alan C. Baker - Harriman TN
Thomas W. Goodell - Harriman TN
Daniel H. Wilbert - Knoxville TN

The Direct Reduction Corporation - New York NY

C21B 1308

75 90R

A method and means for improved control of the process for directly reducing materials containing iron oxides in a rotary kiln using a solid carbonaceous reducing agent, such as coal, introduced from the charge feed and discharge ends of the kiln, as the source of both fuel and reductant, and oxygen-containing gas introduced along the kiln length, is disclosed wherein the portion of the reducing agent fed at the discharge end is injected in the form of two or more streams through the discharge end of the kiln onto the charge bed in such manner as to permit close and efficient control of the process, particularly when carried out in larger kilns. The important features in creating and distributing the streams over the bed are described including their longitudinal distribution and axial spread, as well as their contact regions with the kiln interior side walls and the quadrants of the kiln barrel into which they are directed, to meet the incremental heat demands along the successive segments of the charge bed, whereby the bed and gas phase temperatures may be controlled and heat transfer to the bed enhanced.