First confirm whether the furnace is overloaded. The trolley and furnace door linkage mechanism uses electric or pneumatic drive. Operators must batch materials according to the rated load weight. Overloading will affect temperature control accuracy and shorten the service life of the furnace lining. Next, check whether the electric heating element wiring is loose, whether the thermocouple position has shifted, and whether the furnace door seal is intact.
Check each shift whether the electric heating elements are oxidized or broken, whether the refractory bricks of the furnace lining have fallen off, and whether the furnace bottom plate is deformed. The trolley and furnace door linkage mechanism uses electric or pneumatic drive. It is necessary to check whether the limit switch operates reliably to prevent power from being supplied before the furnace door is fully closed. Thermocouple compensation wires should be kept away from power cables to avoid signal interference.
Set the heating rate according to the workpiece material and furnace load. Generally, carbon steel parts can use a faster heating rate, while alloy parts require segmented heat preservation. The temperature controller has a multi-segment program setting function and supports PID self-tuning. Electric heating furnaces use electrical energy converted into heat energy to heat, melt, or process materials. If the process requires constant temperature, a deviation alarm can be set in the heat preservation stage.
After shutting down the furnace, wait until the furnace temperature drops to a safe range before cleaning the furnace chamber to avoid rapid cooling damage to the refractory material. When cracks in the furnace lining exceed the specified width, they should be repaired or replaced in time. Do not directly put wet workpieces into the furnace chamber, so as not to affect the service life of the furnace lining and temperature control accuracy.
