刚柔耦合高弹性筛面运动学与料群透筛分布规律  

Kinematics of rigid-flexible coupled high elastic screen surface and screening distribution law of material

作　　者：江海深 于世杰 赵跃民[1] 段晨龙[1] 赵建军 王宏 JIANG Haishen;YU Shijie;ZHAO Yuemin;DUAN Chenlong;ZHAO Jianjun;WANG Hong(Key Laboratory of Coal Processing and Efficient Utilization(China University of Mining&Technology),Ministry of Education,Xuzhou,Jiangsu 221116,China;Beijing General Research Institute of Mining&Metallurgy,Beijing 100160,China;CCTEG Beijing Research Institute of Land Renovation and Ecological Restoration Technology Co.Ltd,Beijing 100013,China)

机构地区：[1]中国矿业大学煤炭加工与高效洁净利用教育部重点实验室,江苏徐州221116 [2]矿冶科技集团有限公司,北京100160 [3]中煤科工集团北京土地整治与生态修复科技研究院有限公司,北京100013

出　　处：《中国矿业大学学报》2021年第5期923-932,共10页Journal of China University of Mining & Technology

基　　金：江苏省自然科学基金项目(BK20180650);矿冶过程自动控制技术国家重点实验室/矿冶自动控制技术北京市重点实验室开放基金项目(BGRIMM-KZSKL-2021-06);国家自然科学基金项目(51904301);中国博士后科学基金项目(2020M671652)。

摘　　要：粘湿动力煤深度筛分是选煤领域的研究热点,传统弹性筛面虽然能解决筛分过程堵孔问题,但在料群冲击作用下易损坏.为此,设计了刚柔耦合高弹性筛面,采用振动测试研究了刚柔耦合高弹性筛面运动学特性与空间运动轨迹,通过高速动态测试与筛分试验研究了粘湿料群的运动行为与透筛分布规律,在此基础上,优化了刚柔耦合高弹性筛面结构.结果表明:刚柔耦合高弹性筛面与底部加强筋之间的碰撞使得筛面加速度和位移最高可达89.57 m/s^(2)和6.17 mm,分别为筛体加速度和位移的3.81倍和2.30倍,料群在筛面上的平均运移速度随筛面的加速度增大而增大,0~6 mm细粒级物料主要在A,B段透筛,而6~13 mm粗粒级物料主要在C,D段透筛;通过改变刚柔耦合高弹性筛面加强筋空间布置形式,调节刚柔耦合高弹性筛面的运动加速度,进而可以调控料群的运动行为与透筛分布规律,延长难筛分料群的筛分时间,粘湿动力煤的6 mm筛分效率达87.74%.Deep screening of viscous-moist steam coal is a research hotspot in the field of coal preparation. Although the traditional elastic screen surface can solve the plugging problem during the screening process, it is easy to be damaged under the impact of material group. Therefore, the rigid-flexible coupled high elastic screen surface was designed. The kinematic characteristics and spatial motion trajectory of rigid-flexible coupled high elastic screen surface were studied using vibration test. The motion behavior and screening distribution of viscous-moist material group were studied by high-speed dynamic camera and screening test. On this basis, the structure of rigid-flexible coupled high elastic screen surface was optimized. The result shows that the collision between the rigid-flexible coupled high elastic screen surface and the bottom built-in stiffeners enable the acceleration and the displacement of the screen surface up to 89.57 m/s;and 6.17 mm, which are 3.81 times and 2.30 times that of the screen body, respectively. The average moving velocity of the material on the screen surface increases with the increase of the acceleration of the screen surface. The fine-grained materials of 0~6 mm are mainly screened in section A and B, while the 6~13 mm coarse ones are more screened in section C and D. By changing the spatial arrangement of the stiffeners, the acceleration of the rigid-flexible coupled high elastic screen surface can be adjusted, and then the motion behavior and screening distribution of the material can be regulated, so as to prolong the screening time of the difficult-screening material. The 6 mm screening efficiency of the viscous-moist steam coal reaches 87.74%.

关 键 词：刚柔耦合高弹性筛面 粘湿动力煤 运动学 透筛分布 结构优化 

分 类 号：TD94[矿业工程—选矿]