复杂难选铁矿阶段磨矿-磁选-浮选联合选矿工艺  

Stage grinding-magnetic separation-flotation combined beneficiation processing technology for a complex refractory iron ore

作　　者：刘国凯 郑永兴[1,2] 杨春杰 简胜 解晓晨 于勇 王恒 LIU Guokai;ZHENG Yongxing;YANG Chunjie;JIAN Sheng;XIE Xiaochen;YU Yong;WANG Heng(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;State Key Laboratory of Clean Utilization of Complex Non-Ferrous Metal Resources,Kunming 650093,China;Tengchong Hengyi Mineral Products Economic and Trade Co.Ltd.,Baoshan 678000,Yunan,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]省部共建复杂有色金属资源清洁利用国家重点实验室,昆明650093 [3]腾冲市恒益矿产品经贸有限责任公司,云南保山678000

出　　处：《矿冶》2024年第4期525-533,共9页Mining And Metallurgy

基　　金：国家自然科学基金资助项目(51964027);国家重点实验室项目(CNMRCUTS2306)。

摘　　要：以云南滇西某复杂难选铁矿为研究对象,采用X-荧光光谱分析(XRF)、化学多元素分析、X射线衍射(XRD)等手段对该矿石进行分析。结果表明:该铁矿所含回收价值最高的金属元素为铁,矿石中的铁元素主要以磁铁矿形式存在,硫化矿主要包括磁黄铁矿、黄铁矿和闪锌矿等,脉石矿物主要为蛇纹石和滑石等。基于该矿的矿石性质,采用阶段磨矿阶段选别、磁选和浮选脱硫的联合选矿工艺对铁矿石进行选别,通过研究磁场强度、磨矿细度、活化剂种类、捕收剂种类以及起泡剂种类等工艺参数对铁矿石磁选提质及浮选脱硫的影响规律,获得最佳工艺参数条件并依据获得的最佳工艺条件开展闭路试验,最终获得S品位为21.90%、S回收率为68.52%的硫精矿,以及TFe品位为61.56%、TFe回收率为67.41%、S含量为0.67%的铁精矿。结果可为该铁矿石资源高效利用提供支撑。Taking a complex and difficult-to-process iron ore from western Yunnan as the research object,X-ray fluorescence spectroscopy(XRF),chemical multi-element analysis,X-ray diffraction(XRD)and other methods were used to analyze the ore.The results show that the most valuable metal element in the ore is iron,which is mainly present in the form of magnetite.The sulfide minerals primarily include magnetite,pyrite and sphalerite,and the gangue minerals mainly include serpentine and talc.Based on the ore properties of the mine,a combined beneficiation process involving stage grinding and separation,magnetic separation,and flotation desulfurization was adopted to process the iron ore.By studying the effect of process parameters such as magnetic field strength,grinding fineness,types of activators,collectors and foaming agents on the quality improvement of iron ore by magnetic separation and flotation desulfurization,the optimal process parameters were obtained and closed-circuit tests were carried out according to the obtained best process conditions.Finally,a sulfur concentrate with an S grade of 21.90%and an S recovery rate of 68.52%,as well as an iron concentrate with a TFe grade of 61.56%,a TFe recovery rate of 67.41%,and an S content of 0.67%,were obtained.The results could provide support for the efficient utilization of the iron ore resources.

关 键 词：复杂铁矿 阶段磨矿 阶段选别 磁选 浮选脱硫 铁精矿 硫精矿 

分 类 号：TD92[矿业工程—选矿] TD951