Vacuum induction furnace for copper and copper-based alloys
OTTO JUNKER offer a vacuum version of their medium-frequency coreless induction furnace.
A characteristic design feature of the furnace, which usually operates in the 0.5 to 200 mbar range, is that the vacuum is restricted to the actual furnace interior.
Induction coils with their supplies lines for power and cooling water are arranged outside of the vacuum, are freely accessible and clearly arranged in open atmosphere. This design guarantees maximum reliability in furnace operation. It prevents glow discharges and does not require complex, vacuum-tight openings for power and cooling water. This special design also ensures that there can never be any hazardous contact between cooling water and liquid metal within a hermetically sealed area. Typical applications for the JUNKER vacuum induction furnace are:
- degassing of melts
- dezincification of melts
A cooling air system between the furnace coil and the crucible lining protects the cylindrical, vacuum-tight furnace shell against overheating and, at the same time, allows easy checking of the condition of the refractory crucible lining by means of continuous temperature measurement on the cooling air ducts distributed across the circumference of the crucible.