在磁铁矿传统的破碎和磨矿过程中应用粗粒磁选抛尾,是当前国内磁选工艺改革的主要途径。它不仅能够及早抛弃大量脉石与极贫连生体,大幅度节省磨矿能耗,为下一步提高铁精矿品位创造有利条件;而且将显著改善磁铁矿选矿的技术经济指标,对贫磁铁矿的开发利用开辟了广阔前景。针对磁铁矿湿式自磨过程的磨矿特性,研究其与粗粒抛尾的工艺关系,已成为近年来国内外改进自磨流程和自磨机参数,发展粗磨粗选技术的新课题,对新建和改造磁铁矿湿式自磨磁选厂都具有重要意义。本文就吉山选厂贫磁铁矿湿式自磨一段闭路流程存在的主要问题,进行了工艺现状的分析,通过多年工业试验研究,归纳了湿 In the traditional crushing and grinding process of magnetite, it is the main way to reform magnetic separation process in our country. It can not only abandon a large number of gangue and anolectic organisms as early as possible, save energy consumption of grinding greatly, and create favorable conditions for further improving the grade of iron concentrate. Moreover, it will significantly improve the technical and economic indexes of magnetite beneficiation, The development and utilization of iron ore has opened up broad prospects. In view of the grinding characteristics of the magnetite self-polishing process and the research on its relationship with the coarse tailing technology, it has become a new topic to improve the self-grinding process and self-grinding machine parameters both at home and abroad, It is of great significance to newly built and renovated magnetite self-grinding mill. In this paper, the main problems of closed-circuit process of wet self-grinding of lean magnetite in Jishan Concentrator are analyzed, and the status quo of the process is analyzed. Through years of industrial experiments and studies, the wet