针对我国弱磁性矿石选矿效率低，强磁选设备存在磁场强度低、磁介质易堵塞、回收率低、维修难度大等重大技术难题。研究提出了微细粒弱磁性矿粒在综合力场中的动力学方程和影响弱磁性矿物选矿指标的关系方程式等一系列磁选机设计方面的理论问题；在装备设计中通过独特的铠装、水内冷磁系，减少漏磁，获得了1.0 T以上磁场强度，实现了强磁选机节能；研发了棒状磁介质及其优化排列结构，解决了强磁选机易堵塞问题；发明了分选大颗粒物料（2~5 mm）的强磁选机，解决了湿式强磁选机仅能处理小于1 mm物料的难题；发明了干式振动高梯度磁选机，使强磁选从湿式分选扩大到干式分选。 SLon系列强磁选机已有30多种型号，单台设备日处理量可达10000 t。研究提出了强磁选选矿的新工艺，实现了SLon系列强磁选机的大规模工业应用。%The mineral processing equipment of weak magnetic ores has some key technological difficulties, such as low magnetic field, easily jammed magnetic media, low recovery rate and difficult maintenance. This paper discusses a series of theoretical problems in designing magnetic separator, including dynamic function of fine-grain sized ore particle in the multi-force field and relation function affecting mineral processing indexes. Magnetic field intensity (>1.0T) is obtained by unique armor furnishing and inner cooling magnetic system to reduce magnet leakage. Easy jamming problem of magnetic separator is solved by bar-shaped magnetic media with optimized structure. The former hydraulic magnetic separator can only process small particle size crude ores (<1 mm). However, the newly-invented magnetic separator has the capacity to separate crude ores with large particle size (2~5 mm).The invention of dry vibrating high gradient magnetic separator expands the magnetic separation from hydraulic to dried technologies. The daily processing capacity of a single SLon magnetic separator reaches 10,000t. The industrial application of SLon magnetic separators, with more than 30 models, has been practiced.
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