Small box-type resistance furnace due to the need to maintain a certain height of the face, are generally made with a stand in the box-shaped housing bottom, legs or brackets support the furnace.
Medium-sized box-type resistance furnace because of their weight and added to the furnace workpiece weight, it is generally furnace are directly on the chassis welding and bricklaying.
Large box-type resistance furnace can be designed to be the foundation of specific special the no steel chassis structure, and welded in place bricklaying, but this electric furnace after installation can not be lifting and moving.
Small and medium-sized box-type resistance furnace door can be used counterweight and manual device to open and close, the lower generally have sand seal groove, there are door on top of a sand seal groove, in order to ensure a good seal when the door is closed, door close contact with the door frame with a clamping device to minimize leaks.
Large box-type resistance furnace with electric or pneumatic, hydraulic opening and closing the door, electric heating elements can generally be in the furnace on the left and right side wall and the bottom surface of the layout, in order to get a good thermal field, the best arrangement of power in nursing on top of heating elements, furnace parts generally stack height does not exceed the width, so the above two aspects are heating plus more effective than the left and right.
Large and medium-sized box-type resistance furnace and guard door wall arranged a number of electric heating elements, to reduce furnace temperature difference, to get a better balance in order to ensure the heat loss of the furnace door, in a large box-type electric furnace by the door of the furnace hearth length of 1/3 as a control area. The pass protection gas stove has the necessary means to ensure safe operation and good song tightness.
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