φ1500/1100无压给料三产品重介质旋流器在二塘选煤厂的应用

Application of the φ1500/1100 gravity-fed 3-product dense-medium cyclone at Ertang Coal Washery

二塘选煤厂针对精煤产率低,矸石含量大,煤质极难选等原煤特性,新增了设计能力为4.5 Mt/a的生产系统,采用超大直径φ1500/1100型无压给料三产品重介质旋流器作为主选设备,生产实践表明,该重介旋流器工艺指标良好,处理能力达500-600 t/h,分选精度EP1=0.022 g/cm^3、EP2=0.020 g/cm^3,数量效率为98.95%,分选下限达到0.25 mm,满足了选煤厂生产需求。

A low yield of clean coal used to be the problem facing Ertang Coal Washery for the reason that the raw coal treated is a kind of extremely hard-to-wash coal in nature and has a high dirt content. To tackle this problem,a new washing system with a designed capacity of 4. 5 Mt / a is added. The system features the use of the superlarge-diameter φ 1500 /1100 gravity-fed 3-product H. M. cyclone as the primary washing equipment. Result of field operation shows that the cyclone works with a remarkable technical performance as follows,which can well meet the demands of the plants： capacity-up to 500-600 t / h,sharpness of separation- Ep1= 0. 022 g / cm^3,Ep2= 0. 020 g / cm^3,organic efficiency-98. 95% and lower separation size limit-down to 0. 25 mm.