Selection of coal preparation process for Qinglongsi coal prparation plant

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.