安徽某铁矿石工艺矿物学研究

Process Mineralogy Investigation of an Iron Ore in Anhui

为了更好地指导安徽某铁矿石的选矿试验,通过化学多元素分析、光学显微镜、X射线衍射等方法分析了该矿石的化学成分、矿物组成、矿石结构构造等特性。研究结果表明:该铁矿石主要的有用铁矿物为磁铁矿和赤铁矿,全铁品位20.63%;脉石矿物主要为钠长石,含量25.56%,其次为石英、黏土和角闪石。磁铁矿和赤铁矿工艺粒度分布较细,半数以上分布在-0.07 mm粒级,2种矿物在-0.07 mm粒级分布率分别为64.46%和90.57%,在-0.03 mm粒级分布率分别为36.35%和72.56%。脉石矿物长石在-0.07 mm粒级分布率为35.98%,次要脉石石英的分布率为53.34%。依据工艺矿物学分析,建议采用阶段磨选工艺流程。

In order to better guide the beneficiation test of a certain iron ore in Anhui,the chemical composition,mineral composition,ore structures and textures and other characteristics of the ore were ana⁃lyzed by chemical multi-element analysis,optical microscope,X-ray diffraction and other methods.The re⁃sults show that the main useful iron minerals in the ore are magnetite and hematite,with TFe grade of 20.63%;the gangue minerals are mainly albite with content of 25.56%,followed by quartz,clay and amphi⁃bole.The particle size distribution of magnetite and hematite in the ore is relatively fine,and more than half of them are distributed below 0.07 mm.The distribution rates of the two minerals at-0.07 mm are 64.46%and 90.57%respectively,and the distribution rates of-0.03 mm are 36.35%and 72.56%,respectively.The distribution rate of gangue mineral feldspar at-0.07 mm is 35.98%,and the secondary gangue quartz is 53.34%.According to the process mineralogy analysis,it is recommended to adopt the stage grinding stage separation process.