FJC20-4A喷射式浮选机在望峰岗选煤厂的应用

Application of FJC20-4A jet flotation machine in Wangfenggang coal preparation plant

通过对煤泥粒度组成及原煤小浮沉试验的研究可知,望峰岗选煤厂入选原煤属难选煤,浮选入料煤泥为极难浮煤。针对KHD浮选机存在的操作复杂,微泡析出量不足,浮选药剂用量大等问题,分析了FJC20-4A喷射式浮选机的工作原理及主要特点,并对两者的应用效果进行了对比。结果表明:与KHD浮选机相比,FJC20-4A型浮选机浮选精煤产率、尾煤灰分、可燃体回收率、浮选完善指标及浮选数量效率分别提高了22.04%、43.83%、26.51%、23.07%和18.08%,浮选抽出率增加了63.64%左右,浮选药剂消耗量降低了0.03 kg/t。最后对选煤厂效益进行了分析,说明FJC20-4A浮选机的应用使选煤厂生产工艺更加灵活,降低了工人的劳动强度和作业难度,增加了浮选剂的使用效率,选煤厂实际增加经济效益7219.96万元/a。

Analysis of size composition of slime and small-scale flotation tests indicate that raw coal is difficult to prepare,while slime is extremely difficult to separate.KHD flotation machine has some disadvantages,its operational process is complex,lacks micro bubble precipitation,consumes large amounts of flotation agents.Analyze working principle and major characteristics of FJC20-4A jet flotation machine.Compare the application effects of those two types of flotation machines.The results show that,compared with KHD,the clean coal recovery,tailings ash,combustible recovery,flotation perfect index and quantity index of FJC20-4A are increased respectively by 22.04 percent,43.83 percent,26.51 percent,23.07 percent,18.08 percent.Flotation extration rate has increased by around 63.64 percent and flotation agent has reduced by 0.03 kg/t.At last,the economic benefits indicates that,thanks to FJC20-4A jet flotation machine,the process becomes more flexible,lightens labour intensity and task difficulty,improves the utilization ratio of flotation agent,the actual economic benefits has increased by 72.1996 million yuan every year.