U-shaped silicon carbide rods, with cross-sectional heating and large spacing, are suitable for heating the bottom or both sides of large box furnaces and car bottom furnaces, offering high temperature control accuracy and convenient wiring.

Silicon carbide heating elements have the advantages of excellent heating capability, small expansion coefficient, resistance to deformation at high temperatures, good chemical stability, and corrosion resistance. Silicon carbide heating elements have a long service life, are easy to install, and convenient to maintain. They can be used in conjunction with automated control systems to achieve certain temperature control effects and maintain a constant temperature.

Reasons for slow heating in silicon carbide rod resistance furnaces:
1. Check if the temperature instrument displays normally.
The thermocouple is not inserted into the furnace chamber, causing the furnace temperature to go out of control. The thermocouple's graduation number does not match that of the temperature control instrument, leading to abnormal temperature display and misjudgment of slow heating.
2. Voltage issues
The power supply voltage is normal, but the working voltage of the furnace is low. This may be due to a large voltage drop in the power supply line or poor contact in the socket and control switch, requiring adjustment or replacement. If the power supply voltage is lower than normal, the heating power of the furnace during operation is insufficient. A phase loss in the three-phase power supply can be adjusted and repaired. The output voltage of the furnace transformer is low.
3. Issues with silicon carbide heating elements
The resistance value of the heating elements does not meet the requirements, resulting in insufficient power; significant differences in resistance values among several groups of elements; short circuits in the heating elements; incorrect wiring of the heating elements; open circuits or phase loss in the heating elements.
4. The furnace is overloaded with material.
5. Increased heat dissipation, degraded thermal insulation performance of the heat shield or furnace lining.
6. The power regulator output power is too low.
7. Setting factors: the controller's set temperature is lower than the actual required value; incorrect time settings, causing the furnace to stop heating before reaching the preset temperature.

In case of malfunction during use, immediately cut off the power for inspection and do not continue operation. Dengfeng Minghui High-Temperature Components Co., Ltd. specializes in the production and customization of silicon carbide rods with extensive experience. For related usage issues, feel free to call for discussion.