Comparison Tests between Magnetic Roasting in a Fluidized Bed and Magnetic Roasting in a Fixed Bed

This paper discussed the roles of magnetic roasting and the main factors that affect magnetic roasting. Mechanism research of magnetic roasting shows that feed size, roasting temperature, reducing atmosphere and roasting time are the main four factors. Comparison tests of magnetic roasting in a fluidized bed or in a fixed bed have been done. The results show that the appropriate feed size and reducing atmosphere play an important role in roasting. The roasting temperature in a fluidized bed is lower than that in a fixed bed and the roasting time in a fluidized bed is much less than that in a fixed bed. As a result, roasting in a fluidized bed has a higher efficiency of heat and mass transfer than that in a fixed bed.