Corundum brick is a general term for refractory bricks. Corundum bricks are actually divided into various grades and different corundum materials.
In general, refractory bricks with aluminum content greater than 85% are called corundum bricks, and corundum can be divided into brown corundum, white corundum, and tabular corundum. Therefore, there are many types of corundum bricks, some are divided according to the aluminum content, some are divided according to different bulk density; there are composite refractory bricks, there are corundum bricks with different production methods; there are heavy and light corundum bricks .
Corundum bricks with different substrates are produced according to the use environment of different temperatures, and in most cases, different grades of corundum bricks are made according to the indicators of the manufacturer. Composite corundum bricks include brown corundum and silicon carbide composite bricks, corundum and silicon nitride composite bricks, as well as white corundum, tabular corundum and mullite composite corundum mullite bricks, corundum mullite bricks also. There are light weight, there is a big difference in the bulk density, there are corundum bricks with different volumes between 1.5, 2.8-3.4; there are also corundum refractory bricks compounded with chrome, chrome corundum refractory bricks are generally used in waste incinerators lining.
Corundum bricks have different aluminum content, and the aluminum content is between 85-98%. Corundum bricks with a content of more than 95% are cast and formed. They are mostly used in glass kiln linings and are quite expensive. They are mainly used in The bottom of the glass kiln is resistant to acid corrosion. There are AZS corundum brick, corundum mullite brick and so on.
If the corundum mullite brick is lightweight, it is produced and cut into the required shape, and the bulk density is generally around 1.5. It can be used in the high temperature insulation layer or directly in the working layer, usually in the lining of light kilns. Such as shuttle kiln lining and some light tunnel kilns.
The heavy corundum brick is very widely used, but it depends on the temperature and erosion of different kiln linings. The parts with extremely high temperature and harsh environment will use white corundum bricks with a bulk density above 3.0, or corundum mullite composite bricks. The composite bricks combined with corundum and silicon nitride are generally used for furnace doors. This kind of brick must have a nitriding pool, and the production method is different from the method of corundum composite brown corundum brick.
Corundum bricks, corundum composite silicon carbide bricks, and corundum mullite bricks are all sintered at high temperature.
Therefore, corundum bricks are just a general term, and there are many corundum bricks of different qualities; the price is also determined by different aluminum content, different bulk densities and different manufacturing methods.
