Induction Resistance Furnaces in Industrial Electric Furnace Applications

The processing effect of using a well-type resistance furnace in the spheroidizing treatment of carbon compounds in steel is quite good. The reason is that this equipment often produces a protective atmosphere during production, ensuring that the surface accuracy of the workpiece remains excellent after completion, thus guaranteeing the workpiece's toughness and rigidity.

The efficiency of the thermal process in industrial井式电阻炉 is measured by the weight of coke consumed to produce one ton of pure iron, or the equivalent original coal consumption of that coke. In recent years, this figure has dropped from 1300 pounds of coke per ton of iron to 1000 pounds.

The furnace shell is焊接from steel to form a cylindrical shape, internally lined with 0.6g/cm³ ultra-lightweight refractory bricks to construct a vertical furnace chamber. The gap between the furnace chamber and shell is filled with alumina silicate refractory fiber and diatomite powder for insulation and heat preservation, enhancing the heat retention performance of the vertical resistance furnace body. The heating element is wound into a spiral shape using iron-chromium-aluminum alloy wire, placed on the support bricks around the furnace chamber, and fixed with plug-in bricks to prevent it from slipping out during tilting. The heating element is connected to the power source via a lead-out from the furnace shell.
The mouth of the well-type resistance furnace is located at the top, with workpieces suspended vertically within the furnace chamber using hoisting equipment. Special lifting devices facilitate the quick loading and unloading of workpieces, and to ensure ease of operation and reduce the height of the building, the furnace body is generally installed entirely or partially underground.