Rule and Kinetics of Oxygen Pressure Water Leaching Oxidation of Molybdenite.

The leaching of molybdenum from molybdenite by oxygen pressure water leaching method was studied. The effects of ore size, oxygen partial pressure, temperature and stirring speed on oxidation of molybdenite were investigated, and the distribution of oxidation products in solid and liquid phases was discussed. The results show that the oxidation of molybdenite can be promoted by the decrease of ore particle size and the increase of oxygen partial pressure, temperature and stirring speed. The oxidation products first enter the liquid phase. When the liquid phase is saturated with MoO₄^2-, the oxidation products will enter the slag phase in the form of MoO₃. The oxidation of molybdenum during oxygen pressure water leaching of molybdenite can be described by the unreacted nuclear shrinkage model. The reaction rate is controlled by the mixed control model, and the apparent activation energy is 40. 55 kJ/mol. [ABSTRACT FROM AUTHOR]