不连沟选煤厂降低介耗的措施

结合不连沟选煤厂工艺流程,分析了不连沟选煤厂介耗不稳定的原因。通过加强介质质量管理、改变介质添加方式、调整磁选机磁偏角、减小磁选机滚筒与槽体间隙、提高磁选机精矿挡沿、控制分流量、增加加压泵、清理维护固定筛、调整脱泥筛筛板筛孔尺寸等措施,不连沟选煤厂降低了磁选机尾矿带介量和产品带介损失,有效减少了-3 mm碎煤进入重介系统,减轻了磁选机工作负荷,改善了悬浮液不稳定的情况,有效平稳了合介桶位,分流量得到合理有效的控制。2010年11月—2011年4月,选煤厂介耗由1.26 kg/t降至0.18 kg/t,降低了85.71%。2011年4月,选煤厂介耗降至0.18 kg/t,已低于国内吨原煤消耗的最低值,节省介质费用高达60.6万元。

Research on ways of reducing medium consumption in Buliangou coal preparation plant

Based on technological process of Buliangou coal preparation plant,analyze the causes of unstable medium consumption.The medium contents in tailing and products have been reduced by several ways,which are strengthening medium quality management,changing medium addition methods,adjusting declination,shortening distance between drum and cell body,lifting clean coal baffles of magnetic separator,controlling bypass flow,adding pressure pump,cleaning and maintaining fixed screen,adjusting screen aperture and the like.All those measures effectively prevent crushed coal below 3 mm into dence medium system,lighten the workload,and stabilize the suspension and medium bucket level.From November,2010 to April,2011,the medium consumption have been reduced from 1.26 kg/t to 0.18 kg/t,in other words,which has been reduced by 85.71 percent.The medium consumption in April 2011 is below the minimum raw coal consumption at home,the saving cost of medium consumption is up to 0.606 million yuan.