How shrinkage holes are formed in corundum mullite bricks

Through this period of understanding, I believe that everyone is no stranger to corundum mullite bricks, but for customers who want to know more about the relevant knowledge of this product, these contents are still not enough. Today, Xiaobian will share with you the knowledge about corundum mullite brick shrinkage, hoping to attract everyone's attention and let everyone have a deep understanding of mullite bricks.

In this way, we can also know when buying and using mullite bricks, not in a hurry, I hope to inspire and help you. The molten refractory material is dense and has low porosity. When subjected to thermal shock and uneven heating, there are no holes for cushion adjustment, so they are prone to bursting.

When fused mullite bricks are cast, the contact part between the brick body and the casting mold is first cooled to form a shell, and then gradually cooled and solidified from the outside to the inside. Because the shell is cured first, the shell cannot shrink when the inside is cured, so a cavity is formed near the casting mouth, and you shrink the porosity. Fused bricks can be divided into non-shrinkage pit fused bricks, semi-shrinkage fused bricks, and ordinary fused bricks according to the keyhole. Cratering is the biggest factor affecting quality.