关键词: 超贫磁铁矿, 选矿新技术, 发展趋势, 高压辊磨机, 搅拌磨机

Abstract: In order to reduce the external dependence of China's iron ore and ensure stable supply， aiming at how to make full use of domestic ultra-lean magnetite resources，the characteristics and applica⁃ tion status of new beneficiation technologies for ultra-lean magnetite in China in recent years are studied and summarized，and the development trend of beneficiation technology for ultra-lean magnetite is dis⁃ cussed. It is concluded that the old concentrator is suitable for the transformation of three-stage closed-cir⁃ cuit crushing + dry pre-concentration + high pressure roller mill closed-circuit ultra-fine crushing + dry and wet re-concentration processes. The new concentrator should further promote the application of new equipment such as high pressure roller mill，fine-grained dry separation and dry screening equipment， and stirring mill. The stope should establish a centralized crushing and dry separation center，and the open-pit stope should carry out ecological restoration in time，which provide a reference for the domestic new construction and reconstruction of similar ultra-lean magnetite concentrator.

Key words: ultra-lean magnetite, new technology for beneficiation, development trend, high pressure roller mill, stirring mill