DEVELOPMENT METHOD OF RUTHENIUM CONCENTRATE Russian patent published in 2010 - IPC C22B11/00 C22B1/04 C22B3/10 

FIELD: metallurgy.

SUBSTANCE: development method of ruthenium concentrate includes thermal treatment of it in mixture to sodium peroxide in iron pans at mass ratio of sodium peroxide to concentrate (0.8-2.0) and gradual temperature increase up to 500-600°C. Then it is implemented treatment of thermal treatment product in water and dissolving in hydrochloric acid with transferring and concentration of rutenum in chloride solution. After product thermal treatment in water received pulp is treated by deoxidising agent, in the capacity of which it is used Na₂SO₃ or C₂H₅OH, up to value achievement of oxidation-reduction potential equal to minus (100-200) mV (relative to chlorine-silver reference electrode). Received sediment is separated up to formed aquatic alkaline solution and subject to dissolving in hydrochloric acid.

EFFECT: achievement of deep development of concentrate with its following concentration in chloride solution with low saline saturation.

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