The microwave-absorbing characteristics of ilmenite concentrate, coke, oxidized ilmenite concentrate and composite additive were investigated by means of microwave cavity perturbation, and their temperature rise curves were measured. Analyses of spectrum attenuation and relative frequency shift showed that the microwave absorbing characteristics of ilmenite concentrate and coke were good, but those of oxidized ilmenite concentrate and composite additive were poor. The microwave-absorbing characteristic of ilmenite concentrate pellets containing coke was also good,and that of the metallized pellets reduced under microwave heating was better than that of the pellets without being reduced under microwave heating. The temperature rise behavior were in good agreement with the spectrum.
