脉冲微波助磨工艺参数对钛铁矿升温性能的影响研究

Study of Effect of Pulsed Microwave Assisted Grinding Process Parameters on the Ilmenite Heating Performance

为了提高钛铁矿回收效率,对钛铁矿在脉冲微波条件下的升温行为进行了研究,采用自制的脉冲微波设备,对钛铁矿进行脉冲微波预处理。研究了不同辐照时间、脉冲微波功率、矿样质量和不同矿样粒度对钛铁矿升温性能的影响。采用X射线衍射仪对矿样组成进行分析,利用激光粒度仪对样品粒度进行检测。研究结果表明:物料在微波场中的升温行为,既决定于矿物本身的性质,又与微波加热设备的功率密切相关。当矿样粒度为25 mm、质量为40 g、辐照时间为30 s、微波平均功率为3 kW时,样品的升温性能最好。该研究对脉冲微波在助磨领域的应用具有重要意义。

Because of its light weight,high strength,and good corrosion resistance,the development and application of titanium have attracted widespread attention from Chinese and foreign scholars.The higher the content,the lower the grade of titanium concentrate that can be recovered,and it is difficult to improve the recovery rate.In order to improve the recovery efficiency of ilmenite,the heating behavior of ilmenite under pulsed microwave conditions was studied.In this study,pulsed microwave pretreatment of ilmenite was carried out using a self-made pulsed microwave device.The effects of different irradiation time,pulse microwave power,weight of ore sample and particle size of different ore samples on the heating performance of ilmenite were studied.The composition of the ore sample was analyzed by X-ray diffractometer,and the particle size of the sample was detected by a nano-laser particle size analyzer.The research results show that the heating behavior of materials in the microwave field is determined not only by the nature of the mineral itself,but also by the power of the microwave heating equipment.The temperature increase rate of ilmenite is significantly affected by the quality of the sample.At the same time,the change law shows consistency under different heating time conditions:When the mass of ilmenite is 40~60 g,the temperature increase rate reaches the maximum.The changes in the quality of ilmenite can significantly affect the heating temperature of the ore sample.Under the condition of a certain microwave power,the longer the microwave acts on the material,the higher the temperature of the ore sample.With the change of the particle size of the material,the microwave temperature showes a trend of increasing first and then decreasing.When the ore sample has a particle size of 25 mm,a weight of 40 g,an irradiation time of 30 s,and an average microwave power of 3 kW,the sample is heated to the best effect.The research in this paper is of great significance for the application of pulsed microwave in the field of grinding aid.