关键词: 金属矿　, 难筛分矿物　, 细粒筛分　, 刚柔耦合筛面　, 弛张筛面

Abstract: Metallic ores resources are essential raw materials for the national economy,national defense construction,and the development of strategic emerging industries.Screening,as a key stage in mineral separation,plays a critical role in impro ving resource extraction and utilization efficiency through technological innovation.This paper reviews typical screening processes for metallic ores,including pre-beneficiation classification and desliming,as well as post-beneficiation medium recovery and dewatering.It analyzes the difficult-to-screen characteristics of ores,such as high fine particle content,high surface moisture, severe sliming,and a large proportion of near-aperture particles.The key technical and scientific challenges are elucidated,in cluding the difficulty in loosening the ore bed,susceptibility of screen surfaces to damage,and severe screen blinding.The re search progress on rigid-flexible coupled screening technology,high-vibration-intensity flip-flow screening technology,and de sign methods for mining screening equipment is systematically reviewed.The rigid-flexible coupled screen surface combines high strength,high elasticity,corrosion resistance,and impact resistance,achieving a vibration intensity exceeding 10 g.The no vel flip-flow screen surface can reach a vibration intensity of over 20 g.These technologies have been widely applied in the fine particle screening circuits of copper,gold,and iron ores,providing effective solutions for the efficient screening of difficult-to screen,sticky,and wet minerals.

Key words: metallic ore,difficult-to-screen minerals,fine particle screening,rigid-flexible coupled screen surface,flip flow screen surface