Study on Process and Kinetics of Oxygen-Pressure Water Leaching of Molybdenite Concentrate AITranslate

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Chinese Library Classification Number:TF841.2[冶金工程—有色金属冶金]

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Orthogonal experiments were used to determine the optimal process conditions for oxygen-pressure water leaching of molybdenite concentrate,and the kinetics study of MoS₂ oxidative decomposition reaction during oxygen-pressure water leaching was carried out under the optimal process conditions.The results show that under the optimal conditions of ore particle size D₉₀=46 μm,oxygen pressure of 1.1 MPa,temperature of 230 ℃,liquid-solid ratio of 7∶1,and reaction time of 1 h,the highest molybdenum conversion ratio can reach 99.77%,with the copper leaching ratio of 97.56%,and the iron leaching ratio of 88.71%.Within the leaching temperature range of 170~230 ℃(other process conditions are set at the above-mentioned optimal values),the oxidative decomposition reaction of MoS₂ in molybdenite concentrate follows the unreacted nucleus shrinking model and is primarily controlled by chemical reaction with an apparent activation energy of 45.71 kJ/mol.