SLon强磁机磁介质尺寸优化试验  

Optimization for Magnetic Matrices Size of SLon High Intensity Magnetic Separator

作　　者：赵礼兵[1,2] 刘立伟[1,2] 梁冰[1,2] 赵阳[1,2] 张锦瑞[1,2] 车冬梅[1,2] 

机构地区：[1]华北理工大学矿业工程学院,河北唐山063009 [2]河北省矿业开发与安全技术实验室,河北唐山063009

出　　处：《金属矿山》2016年第8期124-128,共5页Metal Mine

基　　金：国家科技部国际合作项目(编号:2012DFR70320);河北省自然科学基金项目(编号:E2013209308);华北理工大学科学研究基金项目(编号:Z201301)

摘　　要：为改善司家营铁矿选厂强磁选作业对微细粒铁矿的回收效果,以现场强磁选给矿为研究对象,进行试验研究。结果表明,磁介质介质棒直径为1.5 mm和2.0 mm时比介质棒直径为3.0 mm时对现场强磁给矿的回收效果好。在此基础上进行的φ1.5 mm和φ2.0 mm介质棒数量比分别按1∶2和1∶1配比组成的混合磁介质磁选效果对比试验表明,配比为1∶1较1∶2时分选效果好。对φ1.5 mm和φ2.0 mm按数量比1∶1配比组成的混合磁介质进行现场工业试验,获得了铁品位为27.19%、作业回收率为72.23%、-0.045 mm粒级铁回收率为72.22%的精矿产品。ANSYS有限元分析结果表明:圆柱介质棒磁介质截面半径越小所产生的磁感应强度越强,但其作用的深度较浅,衰减速度快;φ1.5 mm和φ2.0 mm按数量比1∶1配比形成的混合磁介质可以合理分配磁场空间,同时具有磁场梯度高、分布均匀和不易堵塞的优点,可以提高强磁场磁选机对微细粒嵌布赤铁矿的分选指标。试验结果对提高司家营铁矿微细粒难选铁矿石的强磁选工艺回收率具有重要意义。In order to improve the recovery of high intensity magnetic separation for micro grained iron ore in Sijiaying,experiment was conducted on on- site high intensity magnetic separation feeding. The results showed that the high intensity magnetic separation index of the magnetic rod with the diameter of 1. 5 mm and 2. 0 mm is better than that of the rod with the diameter of 3 mm. Magnetic separation effect comparison tests using mixed magnetic rod of φ1. 5 mm and φ2. 0 mm at number ratio 1 ∶ 2 and 1 ∶ 1 indicated that,separation index of φ1. 5 mm and φ2. 0 mm at number ratio of 1 ∶ 1 is better than at ratio of 1 ∶ 2. Industrial test by magnetic matrix rod of φ1. 5 mm and φ2. 0 mm at number ratio of 1 ∶ 1 tests showed concentrate obtained with iron grade of 27. 19 % and yield recovery of 72. 23 %,and iron recovery rate was 72. 22 % for 0. 045 mm grade fraction. The ANSYS finite element analysis results show that the smaller the section radius of the cylindrical dielectric rod,the higher intensity the magnetic induction intensity was. But the depth of its action is shallow and the attenuation rate is fast.Mixed magnetic matrix with φ1. 5 mm and φ2 mm with number ratio of 1 ∶ 1 can reasonably distributes the magnetic field space. At the same time,it had the advantages of high magnetic field gradient,uniform distribution,and no easy to plug. It can also improve the separation effect of high intensity magnetic field magnetic separator for fine particles. The test result was significant to improve the recovery of high intensity magnetic separation for fine grain refractory iron ore in Sijiaying.

关 键 词：磁介质 微细粒赤铁矿 有限元分析 

分 类 号：TP15[自动化与计算机技术—控制理论与控制工程] TD457[自动化与计算机技术—控制科学与工程]