A systematic study on process mineralogy of five different graphite mine in Xichuan county of Henan province had been conducted with the help of the X‐ray fluorescence analysis ,the polarization microscope analysis ,and the X‐ray diffraction analysis .The result showed that the fixed carbon content of the graphite is about 11% ,the impurity constituent is mainly consist of silicon dioxide and aluminum oxide . The content of the graphite ,the objective mine ,is about 10% ,and in gangue minerals ,quartz (about 40% ) and muscovite (about 25% ) are major ,and the graphite mainly distributed alternatively with quartz and muscovite .Five different graphite mine can be divided into two categories ,which first category includes 1#and 2# ,and second category contains 3# ,4# and 5# .Two kinds of graphite are different in the particle size , and the grinding fineness needs respectively less than 0 .0026mm and 0 .013mm so that the liberation degree of the graphite can reach 90% .In all ,the two kinds of graphite mine are refractory ,and the first category is more refractory than the second one .%采用X射线衍射分析、X射线荧光分析、偏光显微镜分析等测试手段对淅川县五个不同矿点的石墨矿进行系统的工艺矿物学研究。结果表明该地石墨矿石固定碳含量11％左右，杂质成分以SiO2、Al2 O3为主。目的矿物是石墨，含量10％左右，脉石矿物以石英、白云母为主，含量分别约为40％、25％，石墨主要与石英、白云母相间分布。五个矿点可归为两类（1＃、2＃为第Ⅰ类，3＃、4＃和5＃样为Ⅱ类），这两类石墨片的粒度不同，要使石墨单体解离达到90％以上，磨矿细度分别需达到－0．0026mm、－0．013mm。综合分析，该两类石墨矿均属于难选石墨矿，而第Ⅰ类（1＃和2＃样）石墨矿比第Ⅱ类（3＃、4＃和5＃样）更加难选。
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