Kinetic model research on drying characteristics of artificial magnetite green pellet

In this study, the effects of drying temperature, hot airflow speed and diameter of green pellet on drying rate of artificial magnetite pellet were deeply investigated to clarify the drying characteristics of artificial magnetite green pellet. The results show that the drying process of artificial magnetite green pellet has three stages, accelerated drying stage, constant drying stage and decelerated drying stage. And drying temperature and hot airflow speed both have significant reciprocal effects on moisture ratio and drying rate of green pellet during the drying process. However, the diameter of green pellet has little effect on drying process of green pellet. Then the drying fitting models of Correction Henderson and Pabis, Lewis, Correction Page (III), Wang and Singh are used to describe the drying kinetics of artificial magnetite green pellet. The fitting results indicate that the drying process of artificial magnetite pellet can be described by Correction Page (III) model accurately. Finally, the contrast experiments demonstrate that the fitting model can well describe the actual drying process.