Element distribution of high iron-bearing zinc calcine in high gradient magnetic field  

高铁锌焙砂在高梯度磁场中的元素分布行为(英文)

作　　者：李密[1] 彭兵[1,2] 柴立元[1,2] 王纪明[1] 彭宁[1] 闫缓[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083 [2]国家金属污染防治工程技术研究中心,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第9期2261-2267,共7页中国有色金属学报（英文版）

基　　金：Project (2011AA061001) supported by the High-tech Research and Development Program of China;Project (50830301) supported by the National Natural Science Foundation of China;Project (50925417) supported by National Science Fund for Distinguished Young Scientists, China;Project (2012BAC12102) supported by the National "Twelfth Five-year" Plan for Science and Technology Support, China

摘　　要：High gradient magnetic separation was conducted in order to separate insoluble zinc ferrite from zinc calcine before acid leaching of hydrometallurgical process. Chemical composition and structural characterization of zinc calcine were studied via inductively coupled plasma （ICP）, X-ray diffraction （XRD）, Mossbauer spectra, scanning electron microscopy （SEM） and laser particle analysis （LPA）. The parameters of magnetic separation which affect the distribution of zinc ferrite and undesired elements, such as calcium, sulfur and lead in magnetic concentrate were investigated. The results of high gradient magnetic separation indicate that more than 85% of zinc ferrite is distributed into magnetic concentrate from the zinc calcine under the magnetic induction of 0.70 T. In addition, about 60% of calcium and 40% of sulfur distribute in non magnetic phases of tailings during magnetic separation process. Most of lead distributes uniformly along the zinc calcine in superfine particle size.采用高梯度磁选将难溶铁酸锌从锌焙砂中分离,并利用ICP、XRD、穆斯堡尔、SEM及激光粒度仪分析锌焙砂中的元素组成及物相结构。考察磁感应强度对铁酸锌及杂质元素如钙、硫和铅在磁选过程中的分布行为的影响。结果表明,85%以上的铁酸锌在0.70T的磁感应强度下能分布到精矿中,60%的钙和 40%的硫主要分布在非磁性物相中,并在磁选过程中富集于尾矿中,大部分的铅以超细颗粒均匀分散在锌焙砂中。

关 键 词：zinc calcine zinc ferrite magnetic separation element distribution 

分 类 号：TD95[矿业工程—选矿]