摘要
通过具有微波吸收功率测定功能的微波干燥试验装置,进行了钼精粉的干燥工艺特性试验研究。结果表明,应用矩形脉冲式微波加热方法干燥钼精粉,且采用依靠物料自身温度高于环境温度的条件所形成的自然对流通风的排湿方式,即接近于无风状态的微风干燥模式是可行的。在本研究的工艺条件下,单位能耗脱水量可达1.0kg/kw·h;与传统的热风干燥工艺相比,单位能耗的脱水量提高了近一倍;本研究结果也表明微波干燥钼精粉工艺与传统干燥工艺技术相比具有干燥速度快、无飞尘损失及节能等优势。
In order to determine the characteristics of molybdenum powder during microwave drying, a microwave drying test device with absorbed microwave power measuring functions was used to carry out the microwave drying of molybdenum powder. The results showed that the rectangular pulse microwave heating method is feasible for applying to dry the molybdenum powder with natural convection ventilation causing by the temperature of material itself is higher than the environment. That is also to say that the breeze drying mode is also feasible on the condition of nearly no wind for microwave drying of molybdenum powder. The dehydration efficiency for unit energy consumption in the conditions of this study is up to 1.0kg/kW·h. That is almost double of that of traditional hot air drying process and molybdenum powder have the characteristics during microwave drying process, such as short drying time, lower lost, dust free and lower power consumption.
基金
河南省自然科学研究基金重点项目(0211062000)
教育部及河南省人事厅留学回国人员资助项目
河南省教育厅创新人才基金资助目
关键词
微波干燥
干燥
矩形脉冲加热
钼精粉
微风干燥
microwave drying
rectangular pulse heating
molybdenum concentrate powder
breeze drying
