The trolley type resistance furnace consists of a furnace body and an electrical control cabinet

    This type of resistance furnace consists of a furnace body and an electrical control cabinet. The furnace body consists of a furnace frame and shell, furnace lining, furnace door, electric heating elements, and furnace door lifting mechanism. Electric heating elements are often arranged on both sides of the walls and at the bottom of the furnace.

    The uniformity of temperature inside the furnace is mainly affected by the arrangement of electric heating elements, the sealing and insulation status of the furnace door, and the temperature in front of the furnace is usually lower. The heating of workpieces in high and medium temperature box furnaces mainly relies on electric heating elements and thermal radiation from the furnace surface. To improve the exchange efficiency of such furnaces, the following measures are taken in production:

(1) Improve the sealing of the furnace door, or heat the electric heating element inside the furnace door, or add a shielding plate in the furnace door hole to reduce the radiation loss at the furnace mouth.

(2) Reasonable arrangement of workpieces, for fire parts with strict requirements, when the distance between workpieces is half the diameter (or width) of the workpiece, has good heat transfer effect and productivity.

(3) Coating the furnace wall with far-infrared coating increases the radiation coefficient, but most coatings cannot maintain their high radiation coefficient for a long time, which affects the effectiveness of use.

(4) Adopting a corrugated furnace arch structure to enhance the radiation heat transfer surface.

(5) Improve the layout of electric heating elements by using sheet-like electric heating elements, increase the radiation area of the elements, and reduce the shielding of radiation lines by wire support bricks. Installing electric heating elements on the top of the box furnace can also improve heat exchange.

(6) Adopting refractory fiber lining to reduce the heat storage and dissipation of the furnace wall.