城郊选煤厂煤泥水处理系统改造实践

针对城郊选煤厂煤泥水处理系统存在的块煤磁选机尾矿灰分低,压滤系统低灰煤泥含量高,浮选精煤损失,集中水池来料复杂,低灰煤泥损失严重等问题,从优化斜轮磁选机尾矿处理,改善加压过滤机入料性质,提高浮选机处理效率和回收集中水池的低灰煤泥4个方面论述了城郊选煤厂煤泥水处理系统的改造实践。最后对城郊选煤厂的改造效果进行了分析,结果表明:改造完成后,选煤厂煤泥水负荷减轻,粗精煤和浮精产率明显提高,降低了煤泥带介量,水处理效率提高,循环水质量得以改善,保障了洗水闭路循环,对保证洗选产品质量具有重要意义。城郊选煤厂每年可创造经济效益1530万元。 There are some striking shortcomings in slime water treatment system in Chengjiao coal preparation plant,which are as followed.Tailings ash from lump coal magnetic separation machine is lower,low-ash slime in filter pressing system not only is higher,also lose seriously,clean coal is the same.The supplied material into gathering pond is complex.Introduce the reform methods from four aspects.Optimize tailings disposal which is operated by inclined lifting wheel magnetic separation machine,better quality of feedstock,improve efficiency of flotation machine and recover low-ash slime in gathering pond.At last,analyze the reform effect.The results show that the reform has lightened slime water treatment,pronouncedly improved clean coal recovery and recirculating water quality,decreased medium content in slime,guaranteed closed water circuit.The good reform effect means high-quality products.The coal preparation plant creates 15.30 million yuan every year