Precautions for Using Refractory Prefabricated Blocks

Issues that should be paid attention to when using refractory prefabricated blocks

1. When designing refractory prefabricated blocks, they should not be too large or too narrow (easy to break). They must be of moderate size. In addition to considering expansion joints between two adjacent pieces, special attention should be paid to them during masonry. Arrange the joints staggered, and the expansion joints can be filled with refractory fiber blankets to prevent “penetrating straight joints” from appearing during masonry, which will cause excessive heat loss through the straight joints and even burn out the furnace shell.

2. During masonry, an appropriate amount of refractory mud or high-temperature adhesive should be used to seal the seams between the refractory prefabricated blocks so that they form a whole after high-temperature sintering, which is not only strong but also reduces heat loss.

3. An appropriate amount of insulation layer should be left between the refractory prefabricated blocks and the furnace shell to prevent the furnace shell from overheating and causing large heat dissipation losses.

4. Larger fire-resistant prefabricated blocks must be designed with lifting hooks to facilitate transportation and installation.

5. The service life will be better if the oven is operated according to the oven specifications.