粗煤泥分选工艺在安家岭选煤厂的应用

从原煤性质变化对产品结构的影响,原有系统的工艺环节是否满足能力提升及工艺改造对选煤厂生产的影响3个方面分析了安家岭选煤厂采用粗煤泥分选工艺进行扩能改造的可行性。对比分析了安家岭选煤厂改造前后的工艺流程,并对改造后的效果进行了分析。结果表明:TBS粗煤泥分选提高了系统处理能力,减轻了浓缩机负荷,保证了加压过滤机、浓缩机的稳定生产,提高了主再选重介质旋流器分选下限,减少了细泥在系统中的积聚,提高了脱介筛的脱介效果、处理能力,改善了末煤离心机的脱水效果,降低了介质损耗;正常生产时,TBS分选密度设定为1.20～1.25 g/cm3,顶水压力设定为95 L/min;选煤厂单系统处理能力由原先的750 t/h增至850 t/h,精煤产率提高了2.92%,每月增加利润700.80万元。

Application of coarse slime separation technology in Anjialing coal preparation plant

The possibility of adopting coarse slime separation technology in Anjialing coal preparation plant is analyzed from three aspects： The influence of different raw coals on product structure, whether the original technology meets the demands of larger throughput capacity, the effect of transformation. The coarse slime separation technologies before and after transformation are compared. The results show that TBS coarse slime separation technology improves the processing capacity of system, lightens the thickener load, promises the stable production of pressure filter and thickener, improves the lower limit of separation of dense-medium cyclone and processing capacity of medium drainage screen, reduces fine slime accumulation and medium consumption, betters the dehydration effect of centrifuge in slack coal treatment process. The proper separation density ranges from 1.20 g/cm3 to 1.25 g/cmz, the backwater pressure is 95 L/min. After transformation, the processing capacity of single system increases from 750 t/h to 850 t/h, the clean coal yield increases by 2.92 percent, the profit increases by 7.0080 million yuan every month.