METHOD FOR PROCESSING OF SULPHIDE AND MIXED MOLYBDENUM-CONTAINING CONCENTRATES Russian patent published in 2014 - IPC C22B34/34 C22B1/04 C22B3/04 

FIELD: metallurgy.

SUBSTANCE: method for processing of sulphide and mixed molybdenum-containing concentrates involves mixing of concentrates with an additive of calcium oxide taken in the quantity of 2-2.5 times excess of the stoichiometrically required one for connection of molybdenum, rhenium and sulphur at oxidation annealing into non-volatile compounds. Then, oxidation annealing of the mixture is performed during 60-120 minutes. Leaching of the obtained stub end is performed in two stages. Water leaching is performed at the first stage during 60-80 minutes at S:L ratio of at least 1:2 and temperature of 90-95°C for selective extraction of rhenium into the solution. At the second stage, leaching is performed by means of a solution of alkali metal carbonate for extraction into the solution of molybdenum and the rest rhenium.

EFFECT: improving efficiency of the method and selective separation of molybdenum and rhenium.

2 cl, 1 dwg, 1 tbl, 1 ex