Furnace for vacuum arc melting of highly reactive metals

摘要

A furnace including a cooled mould having its bottom sealed with a bottom plate and its top sealed with a cooled vacuum chamber fitted with a cover carrying an electrode holder movably fixed therein. Mounted in the cooling spaces of the furnace units, filled with a liquid-metal cooling agent, are tubular heat exchangers intercommunicating with each other to form a closed circulation circuit filled with a coolant which is chemically neutral to the liquid-metal cooling agent and to water. The cooling spaces of the furnace units are filled with a liquid-metal coolant and communicate with an expansion chamber, as well as with a water heat exchanger through a heat-transfer circuit. Arranged intermediate the mould inner wall and its tubular heat exchanger is a shield made in the form of a hollow cylindrical wall. Fixedly mounted intermediate the shield and the mould outer wall along multiple-thread helical lines are metal strips which form channels at the upper and lower sections thereof, and mounted opposite these channels externally of the mould are electromagnetic superchargers.