melting furnace / pit / induction / vacuum

OTTO JUNKER offer a vacuum version of their medium-frequency coreless induction furnace.

Operating in the high and low vacuum range, this furnace is built in two versions.

A characteristic design feature of the first design type is that the vacuum is restricted to the melting crucible itself.

Induction coils with their supply lines for power and cooling water are placed outside the vacuum; they are freely accessible and clearly arranged in the open atmosphere. This design guarantees maximum reliability in furnace operation. It prevents glow discharges and eliminates the need for complex, vacuum-tight lead-through devices for electric power and cooling water lines. Moreover, this special design 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:

carbon reduction in stainless steel melts
deoxidation of stainless steel melts
degassing of melts
vacuum distillation of melts (i. e. removal of zinc)