周期式振动脉动高梯度磁选机的研制与试验研究  

Development and Test Research of a Periodic Vibrating-Pulsing High Gradient Magnetic Separator

作　　者：熊涛 陈禄政[1] 谢美芳 黄会春 刘向民 李雨涵 王泽东 XIONG Tao;CHEN Luzheng;XIE Meifang;HUANG Huichun;LIU Xiangmin;LI Yuhan;WANG Zedong(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China;SLon Magnetic Separator Ltd.,Ganzhou 341000,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]赣州金环磁选设备有限公司,江西赣州341000

出　　处：《金属矿山》2023年第3期227-233,共7页Metal Mine

基　　金：国家自然科学基金面上项目(编号:51874152)。

摘　　要：针对当前高梯度磁选机机械夹杂多、精矿富集比较低的问题,提出在高梯度磁选过程中使磁介质振动,通过形成振动—脉动新型复合力场提高分选精度。在此基础上,研发出一种新型周期式振动脉动高梯度磁选机,用于分选某微细粒铜钼混合精矿试验研究。结果表明:脉动力场有利于分散矿浆及冲洗磁介质表面吸附的矿粒,而振动力场能进一步减少磁介质内部夹杂,增加磁介质与矿粒的碰撞概率,对提高磁性精矿品位及回收率有明显作用。利用该种新型周期式振动脉动高梯度磁选机分选铜、钼品位分别为26.12%和0.36%的微细粒铜钼混合精矿,在适宜参数条件下获得产率为42.53%的高品位铜精矿,钼含量仅为0.07%、铜回收率为50.42%;钼精矿钼品位为0.57%、钼回收率为91.56%;试验钼去除率达80.56%,分选效率为40.61%,铜钼分离效果显著,分离产品粒级回收率分析结果进一步表明该磁选机能有效分选这种微细粒铜钼混合精矿。该种高梯度磁选机为细粒弱磁性矿的高度选择性分选提供了一种新的技术思路。Aiming at solving the problems of mechanical inclusion and relatively low concentration ratio of concentrate in the current high gradient magnetic separators,a vibrating matrix was introduced into the high gradient magnetic separation process to form a vibrating-pulsating coupling force field,to improve the separation accuracy.A new type of periodic vibratingpulsating high gradient magnetic separator was then developed and used for the separation of an ultra-fine copper-molybdenum mixed concentrate.The results showed that the pulsating field is beneficial to slurry dispersion and to washing the adsorbed minerals on the surface of magnetic matrix,while the vibrating field further reduces the inclusions of non-magnetic particles,thereby increasing the collision probability of magnetic matrix with magnetic minerals and generating an obvious improvement on the concentrate grade and recovery.For the ultra-fine copper-molybdenum mixed concentrate assaying 26.12%Cu and 0.36%Mo,this new magnetic separator produced a high-quality copper concentrate assaying 0.07%Mo at a yield of 42.53%and 50.42%copper recovery;meanwhile,the molybdenum concentrate produced from the separator assays 0.57%Mo at a molybdenum recovery reaching 91.56%.The molybdenum removal rate reached 80.56%at a separation efficiency of 40.61%,showing a significant copper-molybdenum separation performance.The size-by-size recovery analysis of the copper and molybdenum concentrates indicates that the separator may effectively separate this fine copper-molybdenum mixed concentrate.This new high gradient magnetic seaprator has provided a new technical sulotion for the high-efficient separation of fine weakly magnetic ores.

关 键 词：振动脉动高梯度磁选 振动磁介质 细粒铜钼混合精矿 铜钼分离 

分 类 号：TD952[矿业工程—选矿] TD452