Separation Coarse Coal Slime By Heavy Medium Treatment Applied Research In Lin-Huan Coal Preparation Plant

With the development of the free-flow three-product heavy medium cyclone, separation process of coarse slime by slime dense medium cyclone is a new method, which is a hot and difficult problem. The research is expanded in the application of slime dense medium process system in lin-huan Coal Preparation Plant, Obtain related data by the small floatation-sink test, small screening test and magnetic-tube test experimental methods, draw the Washability curve and partition curve, analysis raw coal and coarse slime properties.After the experiment and the theoretical analysis, established for+0.125mm slime coal have sorting effect by the system, especially for+0.25mm. And benefit of reduce the viscosity and consumption of the medium, improve the recovery rate of the medium; Reduce the pressure and coal slime interference effect of flotation, which is benefit of flotation.After a lot of discussed and analysis, we can find some problems that fine magnet mineral powder particle size can not meet the requirements, the feeding pressure is not stable, the practical separation density is not easy to control, the determination amount of shunt precision is not enough and so on.Put forward establish a detail database for the raw coal. Aim at the best cooperate suit separate particle problem between mine medium cyclones with the slime dense medium cyclone, we can raise the feeding size to avoid the slime coal has been repeated separation. For-0.25mm separation effect is not stable, we can use the smaller diameter instead of before. And enhance the intelligent control; realize the stability of the feeding pressure, thus, ensure it’s highly efficient.