煤颗粒密度和粒度及浓度对浮选效果的影响研究  

Research on the effect of the density,particle size and concentration of coal particle on flotation

作　　者：徐虎彪 王成师[2] 杨润全[3] 王怀法[3] 

机构地区：[1]中国煤炭科工集团北京华宇工程有限公司,河南平顶山467000 [2]西山煤电(集团)有限责任公司,山西太原030053 [3]太原理工大学矿业工程学院,山西太原030024

出　　处：《选煤技术》2013年第1期1-4,8,共5页Coal Preparation Technology

基　　金：山西省攻关项目"高效节能大型煤用充气式浮选机研制"(20080321066);山西省科技创新计划项目"细粒煤高效流态化重浮耦合分选机研究"(2010102010)

摘　　要：为研究煤颗粒密度、粒度及浓度对浮选末速度的影响,构建了颗粒-气泡结合体模型,并在此基础上推导出了其上浮末速度计算公式;运用上浮末速度计算公式可计算出不同密度、粒度、浓度时颗粒-气泡结合体的上浮末速度。计算结果表明:煤颗粒粒度越大,不同密度、浓度的颗粒-气泡结合体上浮末速差值越大;煤颗粒浓度越大,不同粒度、密度的颗粒-气泡结合体上浮末速度越接近。The particle - bubble aggregate model was established in order to investigate the effect of coal particle density, size and volume concentration on the terminal floating velocity, and on that basis de- duced the calculation formula. The terminal floating velocity of particle - bubble aggregate is predicted by calculation formula. The calculation result revealed that the difference of terminal floating velocity is en- larged with the increase of particle size, and the terminal floating velocity is closed to each other with the increase of volume concentration of coal particle.

关 键 词：颗粒-气泡结合体 上浮末速度 作用机理 颗粒密度 颗粒粒度 颗粒浓度 

分 类 号：TD943[矿业工程—选矿]