INFLUENCE OF THE MOTION BEHAVIOR ON THE CONTACT HEAT TRANSFER BETWEEN THE COVERED WALL AND SOLID BED IN ROTARY KILNS

摘要

The effect of the transverse motion behavior on contact heat transfer was experimentally investigated in an indirectly heated batch rotary drum. Inside the drum, one rotating and one stationary measuring rod were installed, each assembled with 16 K-type thermocouples to measure temperatures. Thus, the radial and circumferential temperature gradients within the solid bed were measured, and the contact heat transfer was determined. As test materials, quartz sand, alumina, and cement powder were used, and the parameters filling degree (10-20%) and rotational speed (1-6 rpm) were varied.