天池选煤厂选矸系统的设计

通过对原煤工业分析、元素分析及工艺性能的分析,说明主采煤层15号煤属高灰、中高硫贫煤,可选性为易选。在分析选煤厂工艺流程的基础上,对选煤厂数质量流程和水量流程进行了计算,说明重介斜轮分选指标δp=1.80 g/cm3,Ep=0.04,次生煤泥质量分数为4%,磁选效率η=99.80%,浓缩作业底流液固比R=3.0;块精煤、粗煤泥、细煤泥水分分别为8%,26%和21%;系统进水量与排水量相等,洗水系统平衡。基于立足国产,确保设备性能先进、成熟可靠、高效低耗的选型原则,对选煤厂主要设备进行了选型计算,并得到了选煤厂最终产品平衡结果。最后对选煤厂经济效益进行了分析,说明选煤厂全年平均介耗为0.8 kg/t,电耗1.35 kWh,洗矸带煤≤3%,块煤Ad和混煤Qnet,ar合格率≥98%,全年净利润2000万元。选煤厂工艺流程具有设计合理,洗选效率高,产品结构灵活等特点,对类似选煤厂的建设具有一定的借鉴作用。 The analysis of raw coal proximate analysis,ultimate analysis and processing property show that No.15 coal is high ash,medium-and-high sulfur meagre coal,which is easy to wash.Based on the technological process,deduce the data quality equation process and hydrologic budget.The results show that,the separation index of inclined lifting wheel separator δp is 1.80 g/cm3,Ep is 0.04,the mass fraction of secondary slime is 4 percent,magnetic separation efficiency is 99.80 percent,liquid-solid ratio of concentrated liquid underflow is 3.0.The moisture of lump clean coal,coarse slime and fine slime is respectively 8 percent,26 percent and 21 percent.The water inflow is equal to water outflow.To adopt advanced,reliable and effective devices,conduce model section calculation for major devices in coal preparation plant.The average medium consumption one year are 0.8 kg/t,power consumption are 1.35 kWh,the mass fraction of coal mixed in gangue is less than or equal to 3 percent,the qualified rate of lump coal Ad and mixed coal Qnet,ar is more than or equal to 98 percent.The retained benefits for each year is 2×107 yuan.Since a series of great advantages of the improved technological process,it provides reference for the transformation of other coal preparation plants