Abstract: In order to effectively utilize the molybdenum ore resources with low grade and multiple associated components in Mongolia，systematic process mineralogy research was carried out. The results showed that the useful minerals in ores are molybdenite，powellite and scheelite，and harmful gangue minerals is talc. Molybdenite is with variable grain sizes，while scheelite has fine particle size. The particle size of powellite is between them. The structure of the ore is mainly granular columnar crystalloblastic structures and texture is mainly massive texture. Molybdenite is flaky or curved scales. Powellite is mostly selfshaped grain contained in garnet，diopside，calcite and other minerals. Scheelite is associated with apophyllite. About 30% of molybdenum in ore exists in the form of molybdenum oxide，which has a great influence on the flotation recovery rate of molybdenum. Talc with the related floatability of molybdenite can be removed by high-intensity magnetic separation process. The mineral separation process of sediment separation，auxiliary magnetic separation，and beneficiation-metallurgy union is recommended.

Key words: molybdenum ores, process mineralogy, embedded characteristics