旋转摩擦电选及其对粉煤灰脱炭研究  

Study of rotary triboelectrostatic separation and decarbonization of fly ash

作　　者：陶有俊[1] 张杰[1] 王旭[1] 邓明瑞[1] 陶东平[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《中国矿业大学学报》2014年第4期672-677,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51274200);国家自然科学基金委员会创新研究群体科学基金项目(51221462);高等学校博士学科点专项科研基金项目(20130095110010)

摘　　要：从动力学角度论述旋转摩擦电选的原理和分离过程,推导出了球形颗粒在电场中的运动轨迹,分析了粉煤灰试样粒度组成、化学及矿物组成以及摩擦电选脱炭效应,研究了摩擦轮转速和极板电压等关键操作参数对粉煤灰脱炭效果的影响,结果表明:不同颗粒的运动轨迹受颗粒所带电荷、颗粒质量、颗粒半径、以及电场强度影响;随着摩擦轮转速的增加,脱炭效果先增强而后基本保持不变,其他参数不变,摩擦轮转速为4 310 r/min时,脱炭效果最佳;脱炭效果随着极板电压的增加而增强,在选定的水平范围内,最佳极板电压为25 kV.The principle and separation process of rotary triboelectrostatic separation were discussed based on dynamics. The movement trajectory of spherical particles was deduced in electric field. The fly ash characteristics of size composition, chemical and mineral composition and the triboelectrostatic separation effect were analyzed. The influences of key parameters including friction wheel speed and electrode voltage on the decarbonization effect of fly ash were studied. The results show that the moving trajectory of different particles was affected by its charge, weight, radius, and electric field intensity. The decarbonization effect increased first and remained basically the same with the increasing of friction wheel speed. The optimal decarbonization effect was achieved when the friction wheel speed is 4 310 r/min and other specific parameters remained the same. The decarbonization effect increased constantly with the in- creasing of electrode voltage and the optimum value is 25 kV in the range of fixed level.

关 键 词：旋转摩擦电选 粉煤灰 脱炭效果 

分 类 号：TD922[矿业工程—选矿]