Q: When faced with various box-type electric heating furnaces, how can operation and maintenance personnel quickly select a model based on process temperature? A: First confirm the maximum operating temperature. In the SX2 series model numbers, the latter part indicates the maximum temperature, e.g., 10 corresponds to 1000°C, and 12 corresponds to 1200°C. If the process temperature does not exceed 900°C for a long time, SX2-4-10 or SX2-8-10 can be selected; if above 1000°C is required, choose SX2-12-10 or a higher specification. At the same time, check the temperature control accuracy. Conventional PID regulation can stabilize within ±2°C, meeting most heat treatment requirements.
Q: How do rated power and furnace chamber volume correspond? A: The first part of the model number represents the rated power (kW), e.g., SX2-12-10 is 12kW. Power and furnace chamber size must match: a small chamber with high power easily causes overheating, while a large chamber with low power heats up slowly. It is recommended to calculate based on load quantity and heating rate: usually 0.15~0.25kW per liter of furnace chamber volume. If the workpiece absorbs a lot of heat or rapid heating is required, the power margin can be appropriately increased.
Q: When temperature control is unstable, which parts should operation and maintenance personnel check? A: The control system consists of a temperature sensor, PID controller, and solid-state relay. First check whether the thermocouple installation is loose or oxidized, then confirm whether the PID parameters are mismatched due to process changes, and finally measure the solid-state relay output with a multimeter. Regularly clean oxides inside the furnace chamber and check whether the resistance wire or silicon carbide rod is broken. When reheating after long-term shutdown, stepwise heating should be used to remove moisture. The SX2-12-10 box-type electric heating furnace is suitable for scenarios such as metal heat treatment, ceramic sintering, and laboratory sample ashing.
