Q: According to the JB/T 2379 standard, what is the typical temperature control accuracy required for industrial electric heating furnaces? A: Precision equipment can achieve ±1°C, and some processes require ±0.5°C. The JDX-90 industrial electric heating furnace has a working temperature range of 400°C to 1200°C, suitable for medium- and high-temperature heat treatment and sintering processes.
This model has a rated power of 90kW, uses AC 380V three-phase power supply, and has a furnace chamber size of 1200×600×500mm. The heating rate can be set in steps within the range of 1 to 20°C/min, meeting the thermal stress requirements of different materials. The thermal efficiency of the equipment is within the conventional range for industrial resistance furnaces. During continuous operation, it is necessary to confirm the workshop's power distribution capacity and heat dissipation conditions.
The furnace chamber adopts a box-type structure, with a composite lining of refractory fiber modules and lightweight refractory bricks. In the standard configuration, it is suitable for an air atmosphere; if heating is required in an inert gas or vacuum environment, a sealed retort and gas pipeline interface can be added to prevent oxidation of workpieces at high temperatures. The furnace door seal uses high-temperature-resistant fiber rope, combined with a manual compression mechanism.
The temperature controller supports a 30-segment programmable heating curve and has a PID self-tuning function. Over-temperature alarm, thermocouple break protection, and leakage protection are standard, with the leakage action current set at 30mA. It is recommended to calibrate the thermocouple once a year to ensure that the temperature indication deviation remains within the allowable range.
The equipment should be installed on flat ground with good ventilation and no corrosive gases, and the distance between the furnace body and the wall should not be less than 800mm. For first use or after long-term shutdown, the furnace must be dried in stages at 100°C, 200°C, and 400°C, with each stage held for 2 to 4 hours to remove moisture from the furnace lining. Daily inspections should focus on the wear of the furnace door seal, looseness of wiring terminals, and the operating status of the fan.
