潮湿细粒物料的筛分粘附模型研究  

Adhesive Model of Moist Fine Material

作　　者：陈惜明[1] 赵跃民[2] 朱红[2] 高庆宇[2] 

机构地区：[1]淮北煤炭师范学院化学系,安徽淮北235000 [2]中国矿业大学化工学院,江苏徐州221008

出　　处：《中国矿业大学学报》2002年第5期407-410,共4页Journal of China University of Mining & Technology

基　　金：国家杰出青年科学基金项目 (项目编号 5 0 0 2 5 411);煤炭科学基金资助项目 (96加 10 10 3 )

摘　　要：探讨了潮湿细粒物料在普通振动筛 (如直线振动筛和圆振动筛 )筛面上积聚的原因和粘附机理以及粘附力、粘附厚度的影响因素 ,进行了潮湿细粒物料和干燥细粒物料的对比筛分实验、X射线衍射分析、电子显微镜扫描等试验 .结果表明 ,存在于颗粒之间的液体桥是促使潮湿细粒物料聚集的首要因素 ,外在水分是造成细粒物料筛分困难的主要原因 .Accumulation, adhering mechanism, adhering force, and adhering thickness of fine moist material adhered on a commonly used vibrating screen were discussed, and the influencing factors were analyzed. The XRD and SEM analyses were carried out for both moist and dry fine particles. The result shows that the liquid bridge between two particles is the main factor for the accumulation of moist fine particles. The moisture is the main factor for the fine particles to be hardly separated. The mathematics model for calculating the adhering force and the method for solving the problem of screen blocking are put forward.

关 键 词：筛分粘附模型 潮湿细粒物料 外在水分 粘附力 粘附厚度 粉煤 X射线衍射分析 

分 类 号：TD94[矿业工程—选矿]