微波场中钛精矿的温升行为及吸波特性

The Temperature Rise Behavior and Microwave-absorbing Characteristics of Ilmenite Concentrate in Microwave Field

采用微波谐振腔法对钛精矿、焦炭、氧化钛精矿、复合添加剂的吸波特性(εr")进行研究,同时测定其温升曲线。通过对波谱图的衰减值和相对频移分析表明,钛精矿和焦炭具有良好的吸波特性,氧化钛精矿和复合添加剂对微波的吸收能力较差;钛精矿含碳球团具有良好的吸波特性,经微波还原的金属化球团吸波特性好于钛精矿含碳球团吸波特性。温升行为的结果和波谱图的检测结果相吻合。

The microwave-absorbing composite additive were investigated characteristics of ilmenite concentrate, coke, oxidized ilmenite concentrate and 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.