针对长期困扰选煤厂的粗煤泥脱泥脱水筛分环节筛上物灰分高、筛下跑粗等问题，通过分析液相、固相透筛规律，基于三质体振动理论，成功开发了三质体智能脱泥脱水细筛，并以此优化了多座选煤厂原有的粗煤泥脱泥脱水工艺。结果表明：筛面加速度越大，液相的透筛速度越高；粒度越小、亲水性越强，物料解聚并发生细粒透筛所需的振动强度就越大；对于潮湿细粒物料的分级，有效方案为“高频、小振幅”；研发的三质体智能脱泥脱水细筛振动频率高达50 Hz，比一般的高频振动设备的频率高一倍，且具有筛框不动、振动器及振动轴微动、筛网正常振动的特点，整机的可靠性高，较常规高频筛节能达50%以上，可应用于粗精煤泥脱泥降灰、难浮选煤泥回收、超细煤泥分级、中矸磁尾脱水等工艺中，并可有效降低煤泥产品的灰分、水分，进而提高选煤厂的经济效益。

High ash of screen oversize and the presence of oversize particle in undersize material are a long-standing vexing trouble faced by coal preparation plant in coarse slime desliming and dewatering process. Based on analysis of the patterns of both liquid and solid phases passing through screen plate and the 3-mass vibration theory, an intelligent 3-mass desliming-dewatering fine screen is successfully developed. The screen has been introduced by several coal preparation plant for optimization of the screens originally used for such purpose. Field application of the screen shows that the higher the acceleration of screen surface, the higher the speed at which the liquid phase passes through the screen; the finer the particle size, the higher the hydrophilicity becomes and a higher vibration intensity is required for the finer size to pass through the screen because of the aggregation and deaggregation affect; for effective sizing of wet fine material, the screen needs to operate preferably with a high frequency and a small amplitude; the 3-mass fine screen developed can operate with a vibration frequency as high as 50 Hz, doubling that of ordinary screen; when the screen mesh is in vibration at such a high frequency, the screen frame remains motionless and only the vibrator and vibrating shaft undergo a slight vibration motion; the screen is high reliable in operation and its energy consumption is 50 percent or even less than conventional high-frequency screen; the screen is suitable for desliming and ash reduction of cleaned coarse slime, recovery of hard-to-float fine coal, sizing of ultrafine coal slime, dewatering of magnetic tailings of middling and refuse, and effective reduction of ash and moisture of slime product for improvement of economic performance of coal preparation plant.