北单比分直播澳客网:Reasons for dumb sound in high alumina refractory bricks
For people or things that are born and lost, we always have a compassionate heart for them. What we are most angry about at this moment is how to find out the culprit causing them to appear like this, then for high alumina refractory bricks. It is said that there is often a mute phenomenon in the defective products. So what happened at this time?
1. There are many impurities in the raw materials of high alumina refractory bricks, such as vermiculite, grass roots, sand grains, etc.
2, the raw materials are not weathered, now used now, it is easy to form refractory brick mute bricks;
3. There are more sand in the raw materials, and there are already delamination defects when the bricks are formed;
4. The dry billet after drying of the high-alumina refractory brick absorbs the moisture in the air, which constitutes the resurgence of the brick blank. This kind of resurgence brick blank is easy to become a mute brick after roasting;
5. The preheating of the wet billet is too fast, and the billet is heated up quickly without being boring, forming an internal crack;
6, the insulation cooling time is too short, the cooling rate is too fast and caused by rapid cooling.