How will the life and performance of the heating element of a Trolley Type Resistance Furnace change in different operating temperature ranges?
Publish Time: 2024-08-10
The life and performance of the heating element of a Trolley Type Resistance Furnace will show different characteristics of change in different operating temperature ranges.
When operating in a lower temperature range, such as the relatively low temperature preheating stage. The performance of the heating element is relatively stable, and the rate of chemical reactions such as oxidation is relatively slow. Since the temperature is not high, the thermal stress on the heating element is also small, which helps to extend its service life. However, if the resistance furnace is frequently started and stopped at a low temperature for a long time, the repeated temperature changes may cause a certain amount of thermal fatigue in the heating element, although this effect is relatively small at low temperatures. However, over time, the performance of the heating element may gradually decrease, for example, the resistance value may change slightly, which affects the uniformity and rate of heating.
When the Trolley Type Resistance Furnace operates in the medium temperature range, the performance of the heating element begins to face more tests. As the temperature rises, chemical processes such as oxidation reactions will gradually accelerate. For example, for resistance wire heating elements, an oxide layer may gradually form on their surface. If the oxide layer is uniform and stable, it can play a protective role to a certain extent, but if the oxidation is uneven, it may cause local overheating and affect the life of the heating element. The mechanical strength of the heating element may also decrease after long-term operation in the medium temperature range, such as slight deformation. This may further affect its heating effect and life, and requires close attention and appropriate maintenance measures, such as regular inspection and cleaning of the surface of the heating element.
In the high temperature working temperature range, the life of the heating element will be more challenged. High temperature will significantly aggravate the oxidation and creep of the heating element. For some special heating elements, such as silicon carbon rods, there may be a risk of fracture at high temperatures. At the same time, the resistance characteristics of the heating element will change more significantly at high temperatures, and more precise temperature control may be required to maintain the normal operation of the resistance furnace. In short, understanding the life and performance changes of the heating element of the Trolley Type Resistance Furnace in different temperature ranges is of great significance for the rational use and maintenance of the resistance furnace to ensure its efficient and safe operation.
