MELTING FURNACE OF PLASMA ARC MELTING UNIT Russian patent published in 2014 - IPC H05B7/18 

FIELD: metallurgy.

SUBSTANCE: into a melting furnace of a plasma arc melting unit, which includes a cathode and an anode there introduced is a sealed vacuumed housing connected to the cathode and the anode by means of high-temperature sealed lead-ins based on aluminium oxide, an annular insert coaxially enveloping the cathode and electrically isolated from it, and a set of cylindrical rings alternating with washers and contacting the inner surface of the housing. Rings and washers are made from a titanium sponge and have different inner diameters; besides, in the annular insert there is a coaxial cavity filled with a porous structure saturated with alkali metal and open on the end facing to the cathode.

EFFECT: possibility of obtaining superconductive alloy with peak transition temperature of alloy to superconductive state; increasing safety of melting in outer space due to a tightly closed housing of a melting furnace; improving the furnace efficiency.

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