为提高振动筛的筛分性能,对振动筛筛面的振动形式和筛分过程中的透筛环节进行了研究分析。由于筛分系统是一个复杂随机过程,限于物理实验的发展,颗粒在筛面上重要的运动信息如位移,速度难获得,利用基于离散单元法(Discrete Element Meth...为提高振动筛的筛分性能,对振动筛筛面的振动形式和筛分过程中的透筛环节进行了研究分析。由于筛分系统是一个复杂随机过程,限于物理实验的发展,颗粒在筛面上重要的运动信息如位移,速度难获得,利用基于离散单元法(Discrete Element Method,DEM)的EDEM软件,对创新型的筛面以摆动与平动复合的振动筛分过程进行了数值模拟,提出透筛概率的概念,建立并分析筛机的振动参数与透筛概率的数学关系。对筛分过程中透筛机理的研究,可以更好地理解筛分过程,为分析筛分机理及筛机参数化设计提供理论基础。展开更多
The Probability Sizing Screen (PSS) developed by China University of Mining and Technology has been used since 1980 for the screening of moist fine raw coal. More than 600PSS's have been installed in Chinese coal ...The Probability Sizing Screen (PSS) developed by China University of Mining and Technology has been used since 1980 for the screening of moist fine raw coal. More than 600PSS's have been installed in Chinese coal mines, bringing about economic benefits to both coal producers and consumers in terms of reduced energy saving, transpertation cost reduction,and environmental protection. While the PSS treats some high-moisture fine raw coal, the mesh apertures may be blinded by the fine particles stuck on the mesh wire of the screen. Recently, the authors have developed the Piano-wire Probability Screen, a new screen which screens moist fine raw coal. This screen assimilates advantages of PSS, having large deck inclination, large aperture and multideck. In addition the new screen uses piano-wire decks which have a new structure, great open area, and no blinding. The results of sizing fine moist raw coal in Lugou Coal Mine, Henan Province,show that the Piano-wire Probability Screen has a large capacity and high efficiency and is an efficient screen for separating moist raw coal with diameter of 6mm. This paper describes the results of fundamental studies on the Piano-wire Probability Screen. and also includes data from pilot-plant studies.展开更多
Based on the analysis of the piano wire’s vibration characteristics, the authors estab lished the mechanical model of piano wire proba bility screen , obtained the analytic so lution of thestable forced vibration...Based on the analysis of the piano wire’s vibration characteristics, the authors estab lished the mechanical model of piano wire proba bility screen , obtained the analytic so lution of thestable forced vibration of screen wires , and developed the para meter designfor m ula of the piano wire screen . The para meter design form ula has been used in coalpreparation industry .展开更多
文摘为提高振动筛的筛分性能,对振动筛筛面的振动形式和筛分过程中的透筛环节进行了研究分析。由于筛分系统是一个复杂随机过程,限于物理实验的发展,颗粒在筛面上重要的运动信息如位移,速度难获得,利用基于离散单元法(Discrete Element Method,DEM)的EDEM软件,对创新型的筛面以摆动与平动复合的振动筛分过程进行了数值模拟,提出透筛概率的概念,建立并分析筛机的振动参数与透筛概率的数学关系。对筛分过程中透筛机理的研究,可以更好地理解筛分过程,为分析筛分机理及筛机参数化设计提供理论基础。
基金This project is supported by the special fund of Chinese institutions of higher learning
文摘The Probability Sizing Screen (PSS) developed by China University of Mining and Technology has been used since 1980 for the screening of moist fine raw coal. More than 600PSS's have been installed in Chinese coal mines, bringing about economic benefits to both coal producers and consumers in terms of reduced energy saving, transpertation cost reduction,and environmental protection. While the PSS treats some high-moisture fine raw coal, the mesh apertures may be blinded by the fine particles stuck on the mesh wire of the screen. Recently, the authors have developed the Piano-wire Probability Screen, a new screen which screens moist fine raw coal. This screen assimilates advantages of PSS, having large deck inclination, large aperture and multideck. In addition the new screen uses piano-wire decks which have a new structure, great open area, and no blinding. The results of sizing fine moist raw coal in Lugou Coal Mine, Henan Province,show that the Piano-wire Probability Screen has a large capacity and high efficiency and is an efficient screen for separating moist raw coal with diameter of 6mm. This paper describes the results of fundamental studies on the Piano-wire Probability Screen. and also includes data from pilot-plant studies.
文摘Based on the analysis of the piano wire’s vibration characteristics, the authors estab lished the mechanical model of piano wire proba bility screen , obtained the analytic so lution of thestable forced vibration of screen wires , and developed the para meter designfor m ula of the piano wire screen . The para meter design form ula has been used in coalpreparation industry .
