Microwave response characteristics and influencing factors of ores based on dielectric properties of synthetic samples

作     者：Feng Lin Xia-Ting Feng Chengxiang Yang Shiping Li Jiuyu Zhang Xiangxin Su Tianyang Tong Feng Lin;Xia-Ting Feng;Chengxiang Yang;Shiping Li;Jiuyu Zhang;Xiangxin Su;Tianyang Tong

作者机构：Key Laboratory of Ministry of Education on Safe Mining of Deep Metal MinesNortheastern UniversityShenyang110819China 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2022年第14卷第2期

页      面：315-328页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 0818[工学-地质资源与地质工程] 

基　　金：financial support from the National Natural Science Foundation of China(Grant No.41827806) supported by Liaoning Revitalization Talents Program(Grant No.XLYC1801002) 

主　　题：Metal minerals Electrical conductivity Metal mineral content Synthetic ore Prediction model 

摘      要：In order to understand the influence of different factors on the microwave response characteristics of ores,the effects of electrical conductivity,metal mineral content,compactness,metal mineral distribution,microwave frequency and temperature on the dielectric properties of synthetic ores(metal mineral and quartz)were *** heating tests were carried out on three types of natural ores(Hongtoushan copper ore,Sishanling iron ore and Dandong gold ore)with significant differences in metal mineral *** test results showed that under microwave irradiation,the stronger the electrical conductivity of the metal minerals,the smaller the penetration depth in synthetic *** those metal minerals with lower electrical conductivity,the microwave absorption coefficient of the synthetic samples increases with increasing metal mineral *** those metal minerals with higher electrical conductivity,the microwave absorption coefficient of the samples first increases and then decreases as the metal mineral content *** the metal minerals are distributed in layers,the penetration depth is much less than that given a uniform *** penetration depth in the sample at microwave frequency of 915 MHz is greater than that at 2.45 *** higher the electrical conductivity of metal minerals used in synthetic ores,the higher the high-temperature sensitivity of electromagnetic shielding coefficient(0.C-500.C).The Hongtoushan copper ore with high metal mineral content exhibits obvious size *** effects of ore structure and crystal particle size on the distribution characteristics of microcracks were *** on the test results,a quantitative prediction model of microwave sensitivity of ore was proposed,which provides guidance for the prediction of ore heating effect and the selection of microwave heating sequence of ore.