METHOD OF EXTRACTION OF RHENIUM AND OTHER ELEMENTS Russian patent published in 2007 - IPC C22B61/00 C22B7/02 

FIELD: methods of extraction of rhenium, sulfur, dispersed and rare-earth elements, noble and non-ferrous metals from badly watered natural volcanic gases.

SUBSTANCE: proposed method includes collection of volcanic gas and cooling it to temperature of 130-150°C due to evaporation of water fed to the gas duct in sprayed form, thus converting the rhenium compounds and compounds of other metals into solid state. During cooling of volcanic gas, liquid elementary sulfur is separated which is used for entrapping rhenium and other metals in high-speed turbulent dust collector or in cyclone. Prior to cooling volcanic gas, elementary sulfur is fed to hot volcanic gas in the amount sufficient for coagulation of dust with drops of liquid in high-speed turbulent dust collector.

EFFECT: complete extraction of precious metals into bulk concentrate.

2 cl, 1 ex