Method for producing pure molybdenum oxide from molybdenite concentrate low-grade

摘要

To be prepared by the pressurized oxygen of molybdenum or intermediate molybdenite concentrate low-grade, molybdenum oxide or ammonium Jimo ribs dating high purity. By optimizing the autoclave conditions and process chemistry that a small amount of molybdenum is solubilized as far as possible, the method according to the present invention allows for almost complete oxidation of inorganic sulfate. Then, led to the leaching process the autoclave effluent 12, before or after the separation step 20,220,410 liquid / solid, I do ammonium leaching 250 or alkali leaching 50,400. Thereafter, the calcined (b) filtration 260, 280, 290 and crystallization, or a calcined 120,480 (a) 60,410 filtration, solvent extraction 70,440, 90,450 and crystallization solution by the 320, thereby producing a molybdenum oxide 125,325,485 a product suitable for chemical grade.