某铁矿石工艺矿物学研究  

Study on Process Mineralogy of an Iron Ore

作　　者：孙德明[1] 王帅 SUN Deming;WANG Shuai(Sinosteel Shandong Mining Co.,Ltd.;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.)

机构地区：[1]中钢集团山东矿业有限公司 [2]中钢集团马鞍山矿山研究总院股份有限公司

出　　处：《现代矿业》2022年第11期124-128,132,共6页Modern Mining

基　　金：“十四五”国家重点研发计划项目(编号:2021YFC2902400)。

摘　　要：为了验证某铁矿深部矿石的可选性及为生产提供指导依据,通过化学多元素分析、铁物相分析、扫描电镜和光学显微镜等方法对该矿石的化学组成、矿物含量以及矿石结构等特性进行了研究。研究结果表明:该铁矿石中含有的主要金属矿物为磁铁矿,其次为赤铁矿和菱铁矿,全铁品位37.82%;主要脉石矿物为方解石、石英和长石。矿石主要呈块状、斑状和浸染状构造,矿石结构主要为粒状结构、斑状结构和交代残余结构等,主要有用矿物磁铁矿、赤铁矿和菱铁矿在-0.07 mm的分布率分别为49.80%,57.89%,43.99%;主要脉石矿物方解石、石英和长石在-0.07 mm的分布率分别为40.76%,69.07%,63.34%。基于对该矿石的工艺矿物学研究,建议其采用分级—预选—磨矿—浮硫—弱磁—中磁—强磁选—浮选工艺。In order to verify the washability of deep ore in an iron mine and provide guidance for pro⁃duction,the chemical composition,mineral content and ore structure of the ore were studied by chemical multi-element analysis,iron phase analysis,scanning electron microscopy and optical microscopy.The re⁃sults show that the main metal mineral in the iron ore is magnetite,followed by hematite and siderite,with a total iron grade of 37.82%.The main gangue minerals are calcite,quartz and feldspar.The ore mainly pres⁃ents massive,porphyritic and disseminated structures.The ore structure is mainly granular structure,por⁃phyritic structure and metasomatic residual structure.The distribution rates of the main useful minerals magnetite,hematite and siderite at-0.07 mm are 49.80%,57.89%and 43.99%,respectively.The distribu⁃tion rates of the main gangue minerals calcite,quartz and feldspar in-0.07 mm are 40.76%,69.07%and 63.34%,respectively.Based on the study of process mineralogy of the ore,it is suggested to adopt the pro⁃cess of classification-pre-selection-grinding-sulphur flotation-low intensity magnetic separation-medium magnetic separation-high intensity magnetic separation-flotation.

关 键 词：工艺矿物学 磁铁矿 结构构造 粒度分布 

分 类 号：TD91[矿业工程—选矿]