陕西某石墨矿工艺矿物学与选矿研究

通过X-射线荧光分析、X-射线粉晶衍射分析、扫描电镜和偏光显微镜等分析手段对陕西某石墨矿进行了系统的工艺矿物学研究。结果表明:该石墨矿主要矿物是晶质鳞片石墨,主要脉石矿物有方解石,石英,黑云母,白云母,长石类(钾长石和钠长石),透辉石,透闪石及少量的帘石类,铁矿物,其中长石类、云母类蚀变较强烈。在工艺矿物学研究的基础上,对该石墨矿采用一次粗磨一次粗选,粗精矿五次再磨六次精选的工艺流程,获得石墨精矿固定碳含量95.92%,回收率90.35%,混合尾矿固定碳含量1.37%的良好选别指标。

Research on Process Mineralogy and beneficiation of a Graphite ore in Shanxi Province

By the methods of X-ray fluorescence analysis, X-ray powder diffraction analysis, scanning electron microscopy and electron polarizing microscope,a systematic study on process mineralogyof graphite ore in Shanxi Provincewas conducted.The results showed that this graphite ore is mainly composed of graphite, calcite ,quartz, biotite, muscovite, feldspar classes (potassium feldspar and albite), diopside, tremolite and a small amount of epidote class, iron mineralsand so on, while feldspar and mica altered intensely.On the basis of process mineralogy studies, the beneficiation tests were carried out with a process of a coarse grinding and a rougher flotation, followed by five regrinding and six cleaner flotation. The fixed carbon content of the concentrate is 95.92%, and the recovery of concentrate is 90.35%, while the fixed carbon content of the mixed tailings is 1.37%.