青龙寺煤矿选煤厂选煤工艺的确定Selection of coal preparation process for Qinglongsi coal prparation plant
黄开林
HUANG Kai-lin(Yulin Shenhua Energy Co.
摘要(Abstract)：
以青龙寺煤矿5-2,3-1煤为研究对象,通过筛分试验、浮沉试验对试验煤样可选性进行了研究。根据青龙寺煤矿原煤具有高发热量、低硫、中高-高挥发分、较高-高热稳定性、高抗碎强度、较难磨、化学反应性强等特性,确定了选煤厂主要产品结构。通过对是否进行粗煤泥分选和细煤泥干燥的讨论,得出粗煤泥不分选和细煤泥干燥的方案。最后结合选煤厂原煤分选粒级、选煤方法等,确定选煤厂采用50～0 mm原煤无压给料三产品重介旋流器分选,0.50～0.25 mm粗精煤和粗中矸煤分别回收后掺入精煤和中煤;-0.25 mm细粒煤加压过滤机及压滤机联合脱水,脱水后细煤泥可直接掺入中煤或矸石,也可部分或全部进入干燥系统干燥的联合回收工艺。
Taking 5-2,3-1 coal of Qinglongsi coal mine as research objects,analyse their characteristics by screen analysis and float-and-sink analysis.The results show that,the raw coal have the qualities of high calorific value,low sulfur,medium-high/high volatiles,higher/high thermal stability,great broken strengthen,wearability and chemical reactivity.Based on the qualities,confirm the products structure of coal preparation plant.Through the analysis confirm that the coarse slime don't separate and fine slime need to dry.Combining size range of separation and preparation method,determine the specific production plan.Pressureless feeding three-product dense medium cyclone prepares 50 mm to 0 raw coal.Recover coarse clean coal and coarse middings ranging from 0.50 mm to 0.25 mm respectively,then mix into clean coal and middings.Dewater the fine pea coal below 0.25 mm with pressure filter,then mix directly into middings or gangue,part or whole of dry fine pea coal also can be recovered into drying system.
关键词(KeyWords)：
选煤工艺;重介;脱泥;干燥;优化
coal preparation process;dense medium;deslime;dry;optimization
基金项目(Foundation):
作者(Author):
黄开林
HUANG Kai-lin(Yulin Shenhua Energy Co.
DOI: 10.13226/j.issn.1006-6772.2013.02.023