Pre - heating during the start - up of a high - temperature electric furnace is carried out to protect the equipment, improve operational efficiency, optimize product quality and increase material utilization. The specific reasons are as follows:

Protect the equipment

Pre - heating can reduce equipment damage caused by temperature differences. Especially for mechanical equipment that requires a gradual increase in temperature, if pre - heating is not carried out and it is directly operated under high load, sudden changes in internal structural stress may occur, resulting in equipment damage or performance degradation.

Improve operational efficiency

When the equipment is initially started, if it is directly operated under high load, the efficiency may be reduced because the internal parts have not fully adapted to the temperature. Through the pre - heating process, the equipment can gradually adapt to the working environment, and thus show higher efficiency and stability in subsequent high - load operations.

Optimize product quality

For some processes that require precise control, such as metal processing and ceramic production, pre - heating is an important step to ensure product quality. Through pre - heating, raw materials or workpieces can reach a suitable working state, thereby reducing deformation, cracks and other defects during processing.

Increase material utilization

In some industrial production processes, raw materials or materials need to be pre - heated to fully exert their properties. For example, in the welding process, pre - heating the weld can improve the welding quality, reduce welding deformation and also reduce the risk of weld cracking. In addition, pre - heating can also improve the plasticity flowability in the plastic processing process, making plastic products more uniform and delicate.

In conclusion, pre - heating plays an important role in equipment operation and product processing. Appropriate pre - heating can not only reduce the risk of equipment damage, improve equipment operation efficiency, but also optimize product processing quality and increase material utilization.