摘要
针对陕西汉中某地钒钛磁铁矿金属化球团,采用锥形球磨机为湿法磨矿设备,研究了磨矿碱度对铁粉再氧化的抑制规律,考察了磁选工艺参数对磁选分离效果的影响,并采用扫描电子显微镜(SEM)和X射线衍射仪(XRD)对产物进行分析表征。结果表明,随着磨矿时间延长,矿粉颗粒逐渐降低,均匀度增大,矿物解离度提高;矿粉铁品位随着磨矿碱度提高呈现先增大后降低的趋势,在p H值为13时达59.3%。磨矿粒度-74μm为95.2%,磁选强度60 m T时获得较好的磁选效果,所得磁性精矿产物中铁品位84.9%,钒钛品位分别为0.52%和3.54%,有效实现了铁与钒钛的分离。磁性精矿产物中主要以金属铁为主,非磁性产物中主要由Fe_3Ti_3O_(10)、Fe VO_4、Ca Ti Si O_5、Mg_(1.2)Ti_(1.8)O_5等物相组成。
Tageting the Shaanxi Hanzhong area of vanadium titanium magnetite pellets,selection of conical ball mill grinding equipment was adopted to study the inhibiting law of alkalinity on iron reoxidation and the influence of magnetic separation process parameters on magnetic separation efficiency was furtherly investigated.The products were characterized by scanning electron microscopy（SEM）and X ray diffraction（XRD）.The results show that with the grinding time,slag particles decreased gradually,evenness increased and the mineral liberation improved.With the inreasement of grinding alkalinity,the iron grade increased at first and then decreased,at 59.3%when the p H value was 13under which condition the grind size was 95.2%for-74μm.It could obtain well separation efficiency when magnetic strength was 60 m T,and the iron grade of magnetic concentrate reached 84.9%,and0.52%and 3.54%respectively for vanadium and titanium,which indicates effectively separation of iron and vanadium.Non-magnetic products mainly composed of Fe3Ti3O（10）,Fe VO4,the Ca Ti Si O5and Mg（1.2）Ti（1.8）O5phase composition.
作者
邢相栋
陈云飞
周军
常昕
侯治威
XING Xiangdong;CHEN Yunfei;ZHOU Jun;CHANG Xin;HOU Zhiwei(School of Metallurgical Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055, China;Metallurgical Engineering Technology Research Center of Shaanxi Province, Xi＇ an 710055, China;Shaanxi Province Key Laboratory of Gold and Resources, Xi＇an 710055, China)
出处
《有色金属工程》
CAS
CSCD
北大核心
2018年第2期96-100,共5页
Nonferrous Metals Engineering
基金
国家自然科学青年基金项目(51604209)
关键词
磨矿
磁选
钒钛磁铁矿
grinding
magnetic
vanadium titanium magnetite
