Method of burning the molybdenite concentrates

A new method of burning the molybdenite concentrate is developed. An installation is used in which material is burned in the vortical flow of the oxidizer with obtaining the cinder. It is established that, at a temperature of 600°C and air consumption of 100–120 m 3 /h, 98.7% of MoS₂ transforms into MoO₃ and 85% of Re sublimes in 0.5 h. The sulfur content in the cinder is <1.8%. Upon treating the cinder with a potassium carbonate solution, up to 96.5% Mo is extracted. This method provides a rather high productivity, it is rather simple, it does not require large expenses for equipment and exploitation, it is promising, and it can be used for burning other materials containing sulfides of metals.