PROCESSING METHOD OF MOLYBDENITE CONCENTRATES Russian patent published in 2013 - IPC C22B34/34 C22B1/08 C22B3/12 

FIELD: metallurgy.

SUBSTANCE: processing method of molybdenite concentrates includes concentrate chlorination at temperature not more than 450°C, collection of molybdenum dioxychloride in condenser and its conversion to ammonium paramolybdat. At that alcali metal chlorides are used as chlorinating agent. Chlorination is performed with atmospheric oxygen available forming solid residue which is leached by alkali liquor with molybdenum being converted to solution. Ammonium paramolybdat and molybdenum trioxide are obtained from the solution. When potassium chloride is used as chlorinating agent, potassium sulphate - potassium fertiliser is extracted from leaching solution.

EFFECT: simplifying process and creation of environmentally safe technology for processing of molibdenite concentrates excluding risk of formation and emission of sulphur dioxide to atmosphere.

2 cl, 2 ex