煤泥重介旋流器在赵各庄选煤厂的应用 -

阐述了煤泥重介旋流器的结构特征和工作原理。通过小筛分试验、小浮沉试验和分配曲线分析煤样性质。煤泥重介旋流器分选下限已达到0.10 mm,溢流精煤灰分由入料17.78%降至14.76%,底流灰分达到36.19%,起到了降灰作用;煤泥重介旋流器溢流精煤累计灰分为9.97%,小于精煤产品灰分要求;分选密度δp为1.55 kg/L,可能偏差E为0.085,分选效果达到设计要求。煤泥重介工艺自2011年在赵各庄选煤厂应用以来,使用效果较好,1.00~0.25 mm粗精煤灰分由原来的14%降至11%以下,避免了对精煤产品的污染,降低了浮选系统的入浮煤泥量;精煤损失较低,洗选效率达到90%以上。最后针对煤泥重介工艺存在的合格介质分流量调节空间受限、煤泥合格介质密度调节滞后、精煤产品分级效果差等问题提出了相应的解决措施。 Introduce the structure and mechanism of slime dense-medium cyclone.Investigate the properties of coal samples through size analysis,float-and-sink test and partition curve.The results show that the lower separation limit of the cyclone is 0.10 mm when the overflow ash decrease from 17.78 percent to 14.76 percent and the underflow ash is 36.19 percent.The accumulated ash of slime dense-medium cyclone overflow is 9.97 percent which is lower than required.The separation density δp is 1.55 kg/L and ecart probable moyen E is 0.085,the separation efficiency meet the design requirement.The slime dense-medium process runs well since it was introduced in Zhaogezhuang coal preparation plant in 2011.The ash of primary clean coal whose size ranging from 1.00 mm to 0.25 mm decline from 14 percent to less than 11 percent.This change reduces the clean coal pollution and decreases the pulp into flotation system,the separation efficiency ascend to more than 90 percent.Propose some corresponding solutions to solve the following problems,such as poor classification performance for clean coal,noneffective qualified medium regulating system and lagging qualified medium density regulating system