Abstract: In order to provide theoretical basis to optimize the beneficiation process of a tungsten- molybdenum ore from Henan,the process mineralogy research of the representative ore sample was made by microscope,Mineral Liberation Analyser(MLA),X-ray diffraction analysis and electron microprobe.The results showed that:①Mo content was 0.09% and the WO3 content was 0.13%,the recyclable metal minerals were scheelite,molybdenite and molybdenum scheelite.②The existence form of tungsten and molybdenum in the ore were scheelite,molybdenite and molybdenum scheelite,molybdenum sulfide ore could be recovered by flotation process; the tungsten and molybdenum oxide could only get a tungsten-molybdenum mixed concentrate.③The dissemination size of molybdenite was more coarse than scheelite,so the liberation degree of molybdenite was relatively with the same grinding fineness.④The molybdenum tungsten beneficiation index could be affected by the slimed minerals as chlorite,tremolite,calcite and sulfide mineral as pyrite.

Key words: Dissemination characteristics, Occurrence, Particle size distribution, Liberation degree