High-alumina bricks are commonly used for industrial furnaces such as steel, steel making, hot blast stoves, electric furnace tops, blast furnaces, reverberatory furnaces, rotary kiln linings, etc., which are mainly composed of high alumina bauxite; sillimanite minerals (including Kyanite, red sill, sillimanite, etc.; artificial composition of materials, such as industrial alumina, mullite, fused corundum and so on.)
Characteristics
1.Strong wear resistance
2. Excellent thermal conductivity
3. Great resistance to impact
4. Great slag resistance
Factors affecting quality
Color
When buying high-alumina bricks, the first thing to look at is color. The excellent high-aluminum brick surface is lubricated, the color is yellow and white, the four sides are flat, no break angle, no cracks.
Appearance impurity
In addition, it is to look at the content of impurities on the surface of refractory bricks. In high-aluminum bricks, we often see some black spots on the surface. These are the impurities in the raw materials. In theory, the less impurities, the better, because most of these impurities are the iron oxide is simply reduced to molten iron in the high temperature environment of the kiln, which forms the damage of the refractory brick structure and then affects the service life of the refractory brick.
Weight
To weigh the weight of a single brick, take the T-3 standard brick as an example. The weight of the first grade high aluminum brick is 4.5kg or so. The second-grade high-alumina brick has a single weight of around 4.2kg, and the third-grade high-aluminum brick has a single weight of about 4.0 kg. The equal grade, the equal parameter type can reach this specification and can be regarded as an excellent high-aluminum brick. On the contrary, the quality of this component cannot be achieved.
Article Source:China ladle lining materials development
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/
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