Microwave strengthens decomposition of mixed rare earth concentrate: Microwave absorption characteristics

作     者：Yukun Huang Ting'an Zhang Zhihe Dou Guozhi Lv Guihong Han Weijun Peng 

作者机构：School of Chemical Engineering and Energy Zhengzhou University Laboratory of Special Metallurgy and Process Engineering School of Metallurgy Northeastern University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2019年第37卷第5期

页      面：541-546页

核心收录：

学科分类：080603[工学-有色金属冶金] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0806[工学-冶金工程] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：Project supported by the National Basic Research Program of China(2012CBA01205) the Basic Research Universities Special Fund Operations(N162505002) 

主　　题：Microwave processing Microwave absorption characteristics Dielectric constant Loss tangent Mixed rare earth concentrate 

摘      要：The potential application of microwave heating technology for processing the mixed rare earth concentrate was systematically investigated by analyzing the microwave absorption characteristics in this study. The complex permittivity was measured through resonant cavity perturbation method. The variations of permittivity, the loss factor, loss tangent and the penetration depth with the increasing temperature were investigated numerically. The results indicate that the permittivity increases as the temperature increases, and temperature has a pivotal effect on it. The mixed concentrate is high loss material at the temperature range from 600 to 800℃ according to theoretical analyses of loss tangent and penetration depth. The results of phase transition analysis prove that the variation of microwave absorption characteristics of mixed concentrate is caused by the changes of crystal and lattice *** reflectivity, loss factor and penetration depth of the mixed concentrate were also calculated, and the results indicate that processing the mixed concentrate by microwave heating is of high feasibility and industrial potential.