摘要
细粒矿物1 mm干法筛分过程中,矿物体系微观固液相粘附力强、介观团聚效应显著、宏观料群透筛率低,严重影响筛分效果,制约了矿产资源的大规模提质加工。针对上述问题,提出了强弹性细粒筛分方法,采用振动测试分析与耦合仿真方法,研究了强弹性筛面运动学响应特征,分析了激振参数对筛面加速度的影响规律,明晰了强弹性筛分过程料群松散与透筛分布特性;结合筛分试验与响应面法分析方法,探究了激振力、激振频率、激振方向角、筛面倾角对1 mm筛分效率的影响规律,阐明强弹性筛分过程关键参数的协同作用机制,参数影响显著性梯度为:激振频率>激振力>筛面倾角>激振方向角;建立了筛分效率与各参数间的回归数学模型,在激振力为8.51 kN、激振频率为14.12 Hz、激振方向角为49.97°、筛面倾角为1.95°时,1 mm筛分效率达83.46%。研究结果为1 mm干法筛分技术研发提供了理论与技术支撑。
During the 1 mm dry screening process of fine-grained minerals,the screening efficiency is severely compromised by strong microscopic solid-liquid phase adhesion within the mineral system,significant mesoscopic particle agglomeration effects,and low macroscopic particle bed permeability.These limitations hinder the large-scale,high-quality processing of mineral resources.To address these issues,this study proposes a highly elastic screening method.Utilizing vibration testing analysis and coupled simulation methods,the kinematic characteristics of the highly elastic screen surface were investigated.The influence of excitation parameters on screen surface acceleration was analyzed,and the particle bed loosening and permeability distribution characteristics during highly elastic screening were clarified.Combining screening experiments with Response Surface Methodology(RSM)analysis,the effects of excitation force,excitation frequency,excitation direction angle,and screen surface inclination angle on the 1 mm screening efficiency were explored.The synergistic mechanism of key parameters in the highly elastic screening process was elucidated.The significance gradient of parameter influence was determined as:Excitation frequency>Excitation force>Screen surface inclination angle>Excitation direction angle.A regression mathematical model correlating screening efficiency with the aforementioned parameters was established.The model predicted an optimal 1 mm screening efficiency of 83.46%under the following conditions:excitation force of 8.51 kN,excitation frequency of 14.12 Hz,excitation direction angle of 49.97°,and screen surface inclination angle of 1.95°.The research would provide theoretical and technical support for the development of 1 mm dry screening technology.
作者
温德扬
刘玉函
路明镇
胡玉冰
潘淼
江海深
段晨龙
WEN Deyang;LIU Yuhan;LU Mingzhen;HU Yubing;PAN Miao;JIANG Haishen;DUAN Chenlong(School of Chemical Engineering Technology,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;Shanxi Lanhua Sci-tech Coal Washing Co.,Ltd.,Jincheng 048214,Shanxi,China)
出处
《有色金属(选矿部分)》
2025年第9期101-110,共10页
Nonferrous Metals(Mineral Processing Section)
基金
国家自然科学基金资助项目(52261135540,52504314)
在徐高校服务“343”产业发展项目(gx2023004)。
关键词
强弹性筛面
运动学特性
细粒筛分
参数协同作用
highly elastic screen surface
kinematic characteristics
fine screening
parameter synergistic effect
