FIELD: metallurgy.
SUBSTANCE: procedure consists in heating chemically active gas containing gaseous hydrogen. Further, the procedure consists in bringing oxide of refractory metal to contact with said heated gas in form of particles of pentaoxide of tantalum for reduction of tantalum pentaoxide in form of particles. Also, weight ratio of gaseous atomic hydrogen and tantalum pentaoxide in form of particles is over 1.5:1 at temperature from 1900 °K to 2900 °K with formation of primary metal of tantalum. Another version of the procedure consists in heating chemically active gas containing gaseous hydrogen. Oxide of refractory metal is brought into contact with said heated gas in form of particles of niobium oxide chosen from a group containing of niobium dioxide, niobium pentaoxide and their combination for reduction of said niobium oxide in form of particles. Weight ratio of gaseous hydrogen and niobium oxide in from of particles is at least 9:1 at temperature from 2100°K to 2700°K with formation of primary metal of niobium.
EFFECT: raised efficiency of production of primary metal of tantalum or niobium due to performing process in one stage.
24 cl, 4 tbl, 14 dwg
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| METHOD OF SEPARATING SUBSTANCE UNDER ANLYSIS | 0 |
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