龙山选煤厂高灰细煤泥回收方法研究 -

近年来,随着煤炭洗选深度的增加和煤质赋存条件的变化,煤泥水中高灰细泥含量不断增加,用常规的方法回收煤泥越来越困难,常用的圆盘过滤机和板框压滤机在部分选煤厂不能满足生产的需要,一种新型脱水设备——带式压滤机在高灰细泥的煤泥水回收中显露头角。龙山选煤厂建厂15 a来,厂内煤泥由板框压滤机回收,循环水质量浓度一般在400 g/L以上,一直困扰正常的选煤生产。2010年经过技术改造,由带式压滤机代替板框压滤机回收煤泥,经过1 a的生产使用效果很好,洗水质量浓度降到10 g/L以下,真正实现了厂内选煤用水的闭路循环,提高了精煤产率,净化了周围环境。 The content of high-ash fine slime in slime water increase with the reduction of lower limit of separation and more and more complex coal depositional models.For this dind of fine slime,the common recovery methods are not effective.The typical inoperative facilities are disc-type pressure filter and plate and frame pressure filter.The latter has been used for fifteen years in Longshan coal preparation plant,the concentrations of slime in recirculating water were always more than 400 g/L.To resolve this problem,replaced the plate and frame pressure filter with belt one in 2010.The concentrations decrease to below 10 g/L,realize closed water circuit,improve clean coal yield,reduce environmental pollution