Most people are familiar with vacuum arc furnaces, but the structure of the furnace door is less commonly known. Baoji Dingsheng Vacuum Thermal Technology provides the following detailed description:
The vacuum arc furnace uses a water-cooled steel door frame and furnace door. The door frame inserts into the furnace body and supports the upper part of the furnace wall. The exterior of the door frame serves as a guide for the vertical movement of the furnace door.
The mating surface between the furnace door and door frame forms an angle of 3°–12° with the vertical line to maintain sealing as much as possible. The furnace door should be easy to lift and capable of stopping at intermediate positions. Manual and pneumatic lifting mechanisms often cannot achieve this, but a properly designed linkage system with correct counterweights can. Hydraulic and electric lifting mechanisms are also commonly used.
The heating surface of the furnace door should be lined with refractory bricks or refractory cement for thermal protection.
This summarizes the furnace door structure of a vacuum arc furnace. For further details, consult the manufacturer, Baoji Dingsheng Vacuum Thermal Technology.