Abstract: There is a refractory molybdenum ore in Hebei with high oxidation degree，and molybdenum oxide accounts for 52.54% of total molybdenum，and mainly exits in form of molybdite，powethite，wulfenite etc.; Molybdenum sulfide mineral is mainly amorphous or cryptocrystalline jordisite，and most exists in colloidal aggregates.With poor floatability，it belongs to refractory molybdenum ore.For the efficient development and utilization of the molybdenum resource，study on the process of acid leaching conditions was conducted.The results show that，under conditions of 30 g concentrated sulfuric acid added into 100 g samples with the particle size of 2～0 mm，liquid-solid ratio of 1.5 mL/g，mixing speed at 250 r/min，leaching temperature at 90 ℃ for 3 h，molybdenum extraction rate reached 86.19%.Therefore，sulfuric acid leaching is the efficient development and utilization process for the resources.

Key words: Refractory molybdenum ore, Jordisite, Sulfuric acid leaching