Experimental Study on Molybdenum and Rhenium Extraction from Molybdenum Concentrate by Pressurized Oxidative Ammonia Leaching Method 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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Aiming at the problems of poor adaptability of raw materials,difficulty in treating low concentration SO₂ flue gas and low recovery rate of rhenium in the traditional molybdenum concentrate roasting-ammonia leaching method,molybdenum and rhenium were extracted from molybdenum concentrate by pressurized oxidative ammonia leaching method.The effects of factors such as ammonia dosage,copper salt additive dosage,liquid-solid ratio,kettle pressure,leaching temperature,leaching time and stirring speed on the leaching rates of molybdenum and rhenium were studied.The experimental results show that under the optimized conditions of ammonia excess coefficient of 1.27,copper salt additive dosage of 9%of molybdenum concentrate quality,liquid-solid ratio of 5∶1,kettle pressure of 2.8 MPa,leaching temperature of 160℃,leaching time of 5 h and stirring speed of 800 r/min,the leaching rates of molybdenum and rhenium are 96.85%and 99.29%,respectively.