High Alumina Brick
High Alumina Brick
High alumina brick is one of the most commonly used products in the refractory industry.high alumina brick These are typically made from a combination of kaolin clay and aluminum oxide. The result is a strong brick that is resistant to a wide range of temperatures.
These bricks have a low iron content and are excellent for lining kilns, where fewer lining changes are desired. They also have a high bulk density, making them more durable than other types of fire bricks.
The alumina content in these bricks can vary considerably depending on the application. They usually contain between 40 and 85% of alumina oxide, though they can be as low as 55%.
Some of these alumina bricks are also manufactured from chromium sesquioxide, which makes them very corrosion resistant and able to withstand the rigors of industrial applications. They are especially useful in areas where there is a lot of exposure to corrosive chemicals and acidic conditions.
Another type of alumina brick is the chemically bonded variety. These bricks are particularly string and dense and can be used for a number of applications including electric arc furnace roofs and burner blocks. They also have a lower capacity for shrinkage and are incredibly lightweight.
They are extremely abrasion and wear resistant, resulting in an ideal hot face lining for Sulphur Recovery Units (SRUs). These bricks can handle extreme heats without losing their structural integrity.
This type of brick is available in standard sizes and can be customized to specific requirements. They can be made from a variety of materials including aluminum oxide and mullite.
These bricks are available in both natural alumina and chemically bonded varieties, with both offering unique insulating properties as well as high strength and integrity ratings. They are a versatile choice for many industries and are available in custom shapes as well.
The alumina in these bricks can come from a variety of sources, but the most common is from bauxite. The raw material is then fired at a temperature of over 1450 degrees C. These bricks are then implemented through advanced processes with strict quality control.
This high alumina refractory is often used in linings of blast furnaces, hot blast stoves, electric furnace roofs, reverberatory furnaces and cement rotary kilns. It can also be used as checker bricks, chock plug for gating system and nozzle brick.
It has a very high refractoriness under load, and it can resist both acid and basic slag erosion better than clay brick, but it is not as good as silica brick. It is a neutral refractory material that can be used for linings and it is nearly equal to the refractory composition of fireclay.
They can also be applied as a replacement for nozzle bricks, plug bricks and checker bricks on an open hearth furnace regenerator.
Compared with normal high alumina bricks, they add different mineral composition to the substrate and bonder. They can withstand much more temperature than the normal high alumina bricks, and they have higher refractoriness under load.
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