煤系伴生矿物介电常数和摩擦带电实验研究  

Dielectric constant and tribocharging of minerals companying with coal

作　　者：高孟华[1] 章新喜[2] 陈清如[2] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237 [2]中国矿业大学化工学院,江苏徐州221008

出　　处：《中国矿业》2007年第8期106-109,共4页China Mining Magazine

基　　金：国家高技术研究发展计划(863计划)项目(2002AA529120);国家重大基础研究发展规划(973计划)项目(G1999022205-03)

摘　　要：研究煤炭中伴生矿物的电性质和摩擦带电,将有利于增强对微粉煤摩擦电选过程的理解。对黄铁矿、高岭石、石英和方解石四种矿物进行了实验研究。不同温度和湿度条件下,各矿物的介电常数随温度的升高逐渐减小,随湿度的增加逐渐增大;而矿物的摩擦带电量随温度的升高逐渐增大,随湿度的增加逐渐减小。温度和湿度对矿物的介电常数和摩擦带电量影响较大,因此,摩擦电选过程中,应控制好分选的温度和湿度。It is useful to study the electric property and tribocharging of minerals companying with coal that can be helpful to know the triboelectrostatic beneficiation of fine coal. Pyrite, kaolinite, quartz and calcite are systemically studied. At different temperature and humidity, the dielectric constant of minerals is reduced and the tribocharging magnitude is enhanced when the temperature increases and the dielectric constant is enhanced and the tribocharging magnitude is reduced when the humidity increases. Temperature and humidity have great effect on the dielectric constant and tribocharging magnitude of minerals and so the two parameters should be controlled appropriately during the triboelectrostatic beneficiation.

关 键 词：摩擦电选 介电常数 摩擦带电 微粉煤 

分 类 号：TD924[矿业工程—选矿]