Microwave Drying and Roasting Pellets

A microwave oven of 1400/850 W was used for drying and roasting of pellets.In experiment,the microwave heating rate,drying process and the mineralogical analysis for pellets were investigated. The results show that under microwave radiation the temperature of pellets increases rapidly and the temperature distribution inside the pellets is very uniform compared with the conventional heatly process.The drying rate is also very fast without crack and burst in pellet. The mineralogical phase of the roasted pellets is hematite oxidized from magnetite. The strength of aroasted pellets ranged 170~230kg.