西非某中低品位磁铁矿的工艺矿物学研究  

Study on Process Mineralogy of a Medium and Low Grade Magnetite Ore from West Africa

作　　者：侯代文 梁欢[1] 李洪强 刘明霞 张汉泉[1] HOU Daiwen;LIANG Huan;LI Hongqiang;LIU Mingxia;ZHANG Hanquan(School of Resources Safety Engineering,Wuhan Institute of Technology,Wuhan 430074,China)

机构地区：[1]武汉工程大学资源与安全工程学院,武汉430074

出　　处：《有色金属（选矿部分）》2024年第10期28-35,46,共9页Nonferrous Metals（Mineral Processing Section）

基　　金：国家自然科学基金资助项目(52104264)。

摘　　要：铁矿石的开采和利用是钢铁行业发展的基础,研究采用X射线荧光光谱、X射线衍射分析、场发射扫描电子显微镜等手段,对西非利比里亚某中低品位的磁铁矿开展了详细的工艺矿物学研究。研究表明:该铁矿石中TFe的品位为42.25%,其中含铁矿物以磁铁矿为主,占比52.92%,次为黄铁矿,占比4.66%;脉石矿物主要为透辉石、黑云母和钙长石等。磁铁矿主要呈粒状、多棱角状、不规则状、片状、网格状嵌布,一部分磁铁矿内部包裹无定形的透辉石,另一部分磁铁矿与钙长石相互连生。磁铁矿呈中细粒嵌布形式,粒度主要分布在12~20μm。因此,制定出一段磨矿—粗选—二段磨矿—二次精选的工艺流程,得到了TFe品位为68.43%、TFe回收率为91.14%、mFe品位为67.31%的铁精矿,为西非中低品位铁矿的开发利用提供理论依据。The exploitation and utilization of iron ore is the basis of the development of iron and steel industry.The process mineralogy of a middle and low grade magnetite ore in Liberia,West Africa was studied by X-ray fluorescence spectroscopy,X-ray diffraction analysis and field emission scanning electron microscopy.The results showed that the TFe grade of the raw ore was 42.25%.The iron mainly existed in the form magnetite and pyrite.In addition,the distribution ratio of magnetite and pyrite in the iron ore was 52.92%and 4.66%,respectively.Gangue minerals were mainly diopside,biotite,anorthite and so on.Magnetite existed mainly in granular,polygonal,irregular,flaky,and grid shapes.Part of magnetite grains were internally wrapped with amorphous diopside,the other part of magnetite grains were interconnected with calcium feldspar.Magnetite was distributed in the form of medium to fine particles,with particle sizes mainly distributed between 12 to 20μm interval.Therefore,a process consisting of two stages of grinding,one stage of roughing and two stages of cleaning was adopted.An iron concentrate with TFe grade of 68.43%,TFe recovery of 91.14%,and mFe grade of 67.31%was obtained,which provides a theoretical basis for the development and utilization of the medium and low grade iron ore in West Africa.

关 键 词：磁铁矿 工艺矿物学 赋存状态 利比里亚 

分 类 号：TD912[矿业工程—选矿]