重介质旋流器外置磁场调控技术研究现状及进展  

Status quo and progress of the research work on the technology for adjustment and control of heavy medium cyclone's separation density with external magnetic field

作　　者：宋紫欣 谢海云[1,2] 晋艳玲 张培 曾鹏 陈家灵 张群丽 陈海君 SONG Zixin;XIE Haiyun;JIN Yanling;ZHANG Pei;ZENG Peng;CHEN Jialing;ZHANG Qunli;CHEN Haijun(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南省战略金属矿产资源绿色分离与富集重点实验室,云南昆明650093

出　　处：《选煤技术》2023年第3期1-8,共8页Coal Preparation Technology

基　　金：国家自然科学基金资助项目(52064027);云南省重大科技专项资助项目(202202AG050015)。

摘　　要：为进一步推动重介质旋流器分选过程自动化,基于外置磁场作用下重介质旋流器分选机理分析,对静态磁场和旋转磁场作用下重介质旋流器分选密度影响因素进行了综述,包括静态磁场的磁极厚度及排列方式、励磁电流大小、导磁结构、线圈内径及组合方式、磁系位置,以及旋转磁场的旋转方向、旋转速度等因素。结果表明,利用外置磁场在线调控重介质旋流器二段分选密度具有不影响分选工况、不堵塞设备等显著优势,其中:静态磁场有利于节省能耗,环保高效,理论研究成熟;相比静态磁场,旋转磁场可进一步提高旋流器分选密度,有利于提高细粒级煤分选精度。总体而言,重介质旋流器外置磁场调控技术的发展对进一步提高旋流器分选效率并实现分选过程自动化具有重要意义。In order to push for automation of separation process of heavy medium cyclone,following an analysis of the separation mechanism of heavy medium cyclone under the effect of external magnetic field,the influences on separation density of the cyclone operating under the action of either static or rotating magnetic field,produced by the following factor's are investigated:thickness and arrangement of magnetic poles,magnitude of excitation current,magnetic structure,inner diameter and combination mode transposal of coil and position of magnetic system of the static magnetic field;and the rotation direction and speed of rotating magnetic field.As revealed by study results,the use of external magnetic field to make online adjustment and control of the separation density of the 2nd-stage of the cyclone offers a series of distinctive features such as no adverse influence on the working conditions and no blockage of the cyclone;the use of the static magnetic field is an energy-saving enviromentally-friendly and highly efficient technology,which has reached a theoretically matured stage in its research;compared to static magnetic field,the use of the rotating version can lead to further improvement of cyclone's separation density,and benenficial to improve sorting accuracy of fine coal.The use of external magnetic field for online control of separation density of cyclone is of great significance for improvement of separation efficiency and realization of automated separation process of heavy medium cyclone.

关 键 词：重介质选煤 外置磁场调控技术 静态磁场 旋转磁场 分选密度 

分 类 号：TD942[矿业工程—选矿]