高灰细泥对煤泥水处理系统的影响

分析了升平煤矿选煤厂煤泥粒度组成,发现浮选入料中高灰细泥含量高,增加了煤泥脱水的难度。在论述颗粒直径与浮选特性、药剂消耗关系的基础上,对选煤厂浮选精煤粒度组成进行了分析,说明细粒煤对浮选精煤污染严重。浮选入料细粒煤泥过多造成了选煤厂滤饼水分、滤液浓度高,煤泥水性质恶化,过滤机吸料差,处理能力低,并针对上述问题,将原有PG78-8圆盘真空过滤机更换为GPJ-96加压过滤机对选煤厂进行了改造。改造完成后,GPJ-96加压过滤机的入料质量分数和滤液质量分数均低于PG78-8圆盘真空过滤机,且滤饼质量分数远大于PG78-8圆盘真空过滤机,可见GPJ-96加压过滤机煤泥压滤效果较好;GPJ-96加压过滤机的固体产率由原来的61.53%增加到67.06%,脱水率由原来的92.34%增加到94.86%,降低了循环水浓度,有利于生产的稳定进行。 The analysis of particle size of slime in Shengping coal preparation plant show that,a considerable amount of high ash content in fine slime make it difficult to dehydrate.Analyse the relationship between particle size and floatability,agent consumption,then investigate the particle size of clean coal,find that fine particle coal is the main contaminant.Too much fine particle slime in flotation feed leads to large moisture in filter cake,high concentration filtrate,bad slime water,poor slime absorption ability of filter,low processing capacity and the like.To resolve all these issues,replace PG78-8 disc-type filter with GPJ-96 pressure filter.After transformation,the mass fraction of feed,filtrate and circulating water decrease,especially the mass fraction of filter cake incredibly increase,solid yield increase from 61.53 percent to 67.06 percent,dehydration rate raise from 92.34 percent to 94.86 percent.The transformation stabilizes the production