二氧化锰基吸波剂的真空微波成粒规律及应用性能  

Vacuum-Microwave Granulation Law and Application Performance of the Manganese Dioxide-Based Absorbents

作　　者：连明磊[1] 缪应菊[1] 白志玲[1] 王克良[1] 

机构地区：[1]六盘水师范学院化学与化学工程系,贵州六盘水553004

出　　处：《中北大学学报（自然科学版）》2016年第1期55-60,共6页Journal of North University of China(Natural Science Edition)

基　　金：贵州省科学技术联合基金重点项目资助(黔科合LH字[2014]7446号);贵州省普通高等学校煤系固体废弃物资源化技术创新团队项目资助(黔教合人才团队字[2014]46号);贵州省教育厅特色重点实验室项目资助(黔教高发:2011-278)

摘　　要：在真空条件下用微波辐照粉末状MnO2以制备颗粒状二氧化锰基吸波剂,研究其升温过程及成粒规律.结果表明:存在决定MnO2升温成粒的临界功率点,当MnO2质量为30.0g时,其升温成粒的临界功率点为576W.在800W微波功率下,平均粒径主要为0.75mm和0.52mm.相比空气氛围,真空条件下的成粒粒径图像向粒径增大的方向移动,且升温速率更高.认为过程分为微波诱导、MnO2分解、MnO分解、熔融成粒等4个步骤.二氧化锰基吸波剂与100.0g气化用煤以1∶3.0的质量比混合后在800 W微波场中气化的完全气化时间仅为14.9s.In vacuum, microwave was used for producing granular manganese dioxide -based absorbents from the powdered manganese dioxide, and the heating process and granulation law were explored. The critical power points were found which decided whether manganese dioxide could be warming granulation. When the mass of the manganese dioxide was 30.0 g, the critical power point was 576 W. In the microwave power of 800 W, the average particle sizes were mainly in 0.75 mm and 0.52 ram. Compared to the air atmosphere, the particle sizes images were moved towards the direction of increasing in vacu- um, also, the heating rates were higher. Reaction processes that are divided into microwave -induced, manganese dioxide decomposition, manganese monoxide decomposition and granulation are proposed. After the manganese dioxide -based absorbent made in vacuum was mixed with 100.0 g coal according to the weight ratio of 1 ： 3.0, the complete gasification time was only 14.9 s in the microwave power of 800 W.

关 键 词：微波 真空 吸波剂 临界功率点 

分 类 号：TQ137.12[化学工程—无机化工] TQ536.1