There are fundamental differences in heating mechanisms between resistance furnaces and induction furnaces. Resistance furnaces rely on heating elements to generate heat, which is transferred to the workpiece through radiation, convection, and conduction; induction furnaces use an alternating magnetic field to generate eddy currents inside conductive workpieces, causing them to heat themselves. This difference directly affects temperature control accuracy, heating rate, and the forms of applicable materials.
Taking the RJX-75-12 box-type electric heating furnace as an example, the rated power is 75kW, the maximum working temperature is 1200°C, and the furnace chamber size can be customized. The steady-state temperature control accuracy can reach ±1.5°C, and it supports 30-segment programmable heating. Compared with induction furnaces, the thermal efficiency of a resistance furnace when heating to 800°C is about 55%~68%, lower than the 72%~85% of an induction furnace, but resistance furnaces have no special requirements for workpiece shape or conductivity and can handle various forms such as blocks, powders, thin plates, and wires.
The RJX-75-12 box-type electric heating furnace is suitable for metal heat treatment (annealing, quenching, tempering), ceramic sintering, powder metallurgy, and laboratory high-temperature calcination. Its overall furnace chamber heating method ensures a uniform temperature field and avoids local overheating. For long shaft-type parts, a pit furnace can be selected; for large-volume continuous production, a mesh-belt furnace is recommended.
Operators must be trained and hold certificates. User units should establish operating procedures covering startup, operation, shutdown, and emergency shutdown. Regularly inspect heating elements and furnace linings to ensure safe operation.
