Prediction of accretion growth from dynamic analysis of heat transfer in coal fired sponge iron rotary kiln at Tata Sponge, Joda, India

Abstract

Control of accretion growth in a coal fired rotary kiln for production of sponge iron is important to achieve a long campaign life. Temperature is measured at 11 locations with embedded thermocouples along the entire length of rotary kiln. The surface temperature of kiln is also measured in the form of a thermograph. Heat transfer model is tried to account for both convective and radiation heat transfer inside and outside the kiln. Final accretion thickness is predicted within �16.5 cm towards the end of campaign. In the initial stages of campaign the error is much smaller. � 2018 by AIST.