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以井工开采为主的地方,煤中的含矸量日益增加,采煤综合机械化程度的不断提高,使粉煤在原煤中的比例也越来越大。如英国煤矿的原煤中0.5mm以下的粉煤比重平均达15%;含矸率平均可达45%,有的矿高达60%。为了回收粉煤和澄清洗煤水,实现洗水闭路循环,絮凝剂和过滤剂的使用极为重要。使用絮凝剂有如下效果:沉降速度快;能提高单位面积的过滤速度;改善循环水质和滤液的澄清度;产品均匀。絮凝剂的作用机理合成絮凝剂都是高分子量的水溶性有机聚合物,有很长的链状分子。分子由桥键结合而成,实际上是一种交键的三维矩阵,
In the mining-based areas, increasing the amount of coal in the gangue, coal mechanization continues to increase, so that the proportion of pulverized coal in the coal is also growing. Such as coal in the United Kingdom coal 0.5mm below the average weight of up to 15%; containing rock average rate of up to 45%, and some ore up to 60%. The use of flocculants and filters is extremely important in order to recover the pulverized coal and clarify the coal washing water and achieve a closed loop of washing water. The use of flocculant has the following effects: settling speed; can improve the filtration rate per unit area; improve the quality of circulating water and filtrate clarity; product uniformity. The mechanism of action of flocculants Synthetic flocculants are high molecular weight water-soluble organic polymers, have a long chain of molecules. Molecular bridge formed by the bridge, in fact, is a cross-linked three-dimensional matrix,