凌源野猪沟铁矿石工艺矿物学研究  

Study on Process Mineralogy of Iron Ore in Yezhugou Area of Lingyuan

作　　者：李彦钊 韩跃新[1,2] 高鹏[1,2] 唐志东[1,2] LI Yanzhao;HAN Yuexin;GAO Peng;TANG Zhidong(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National Local Joint Engineering Research Center of High-Efficient Exploitation Technology for Refractory Iron Ore Resources,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]东北大学难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,沈阳110819

出　　处：《有色金属(选矿部分)》2025年第3期17-24,共8页Nonferrous Metals(Mineral Processing Section)

基　　金：国家自然科学基金资助项目(U23A20603,52274253);国家重点研发计划项目(2021YFC2902403);辽宁省自然科学基金资助项目(2023-MS-081)。

摘　　要：辽宁凌源野猪沟地区铁矿资源丰富,赋存形式多样,地质成因复杂,至今难以开发利用。科学系统的工艺矿物学研究是高效开发该地区铁矿石的重要前提。采用化学多元素分析、X射线衍射分析、铁物相分析和SEM-EDS分析等手段对该地区铁矿石进行系统的工艺矿物学研究。结果表明,该铁矿石TFe品位为31.86%,铁元素主要赋存于褐铁矿中,其分布率达到90.76%,脉石矿物主要为石英、绿泥石和云母等。褐铁矿主要以粒状、不规则状、胶状及针状集合体的形式产出,粒度分布不均匀,多分布于微细粒中,-74μm粒级含量高达76.00%;单体解离度仅为12.75%,主要以连生体形式存在,富连生体含量为79.22%。褐铁矿与软锰矿紧密共生,Fe、Mn常以类质同象形式相互取代,物理选矿方法难以实现有效分离;与石英和绿泥石等脉石矿物连生关系复杂,过磨容易出现泥化现象,影响选别效果。在工艺矿物学研究的基础上,采用氢基矿相转化-预先抛尾-磨矿-磁选工艺对该矿石中的铁元素进行回收,在还原温度550℃、还原时间20 min、H_(2)浓度20%、气体流量600 mL/min、磨矿细度-25μm含量占95%及磁场强度为127.324 kA/m的条件下,可获得TFe品位55.16%、回收率74.16%的铁精矿,实现了铁矿物与脉石矿物的有效分离。研究对于该地区铁矿资源的高效开发利用具有一定的指导意义。Iron ore resources are abundant in Yezhugou area of Lingyuan,Liaoning,with various occurrence forms and complex geological genesis,which is difficult to develop and utilize.Scientific and systematic research on process mineralogy is an important prerequisite for the efficient development of iron ore in this area.The process mineralogy of iron ores in this area was systematically studied by means of chemical multi-element analysis,X-ray diffraction analysis,iron phase analysis and SEM-EDS analysis.The results showed that TFe grade of this iron ore was 31.86%,the iron mainly occurs in limonite,and its distribution rate reached 90.76%.The gangue minerals were mainly quartz,chlorite and mica.Limonite was mainly produced in the form of granular,irregular,colloidal and needle-like aggregates,and the particle size distribution was uneven,mostly distributed in fine grains,and the content of-0.074 mm was as high as 76.00%.The liberation degree of monomers was only 12.75%,mainly in the form of connective organisms,and the content of rich connective organisms was 79.22%.Limonite and pyrolusite coexist closely,and Fe and Mn often replace each other in the form of isomorphism,so it was difficult to achieve effective separation by physical beneficiation.The intergrowth relationship between limonite and gangue minerals such as quartz and chlorite was complex,and overgrinding was prone to mudding,which affected the separation effect.Based on the study of process mineralogy,the process of hydrogen-based mineral phase transformation-pre-discarding-grinding-magnetic separation process was used to recover iron from the ore.Under the conditions of reduction temperature was 550℃,reduction time was 20 min,H_(2) concentration was 20%,gas flow was 600 mL/min,the grinding fineness of-25μm content of 95%and magnetic field intensity of 127.324 kA/m,the iron concentrate with TFe grade of 55.16%and recovery of 74.16%was obtained.The effective separation of iron minerals and gangue minerals was realized.This study has certain guiding signif

关 键 词：工艺矿物学 褐铁矿 类质同象 嵌布特征 

分 类 号：TD912[矿业工程—选矿] TD923