What is the initial heating rate for oven firing refractories?

The correct initial heating rate for oven firing refractories is 300°F per hour. This rate is important because it allows for a controlled and gradual increase in temperature, which helps to prevent thermal shock in the material. Rapid heating can cause uneven expansion and stress within the structure, leading to cracking or other damage.

Utilizing a heating rate of 300°F per hour ensures that the refractories transition through changes in temperature smoothly while allowing moisture and any residual volatile compounds to escape safely. This step is critical in the initial stages of firing as it sets the foundation for the integrity and performance of the final refractory product. Maintaining this controlled environment ultimately contributes to better quality and durability of the refractories once they are put into service.