Alumina Bubble Bricks belong to the category of lightweight bricks, and the use ratio is currently not very wide. But why some high-temperature kilns use alumina hollow ball bricks? Refractory manufacturers with rich production and sales experience often provide customers with refractory materials that are most suitable for production needs based on customer requirements and the actual working conditions of high-temperature kilns. This will not only extend the service life of the kiln but also save production costs.
The production process of alumina hollow ball brick. Lightweight hollow sphere bricks are made of alumina hollow spheres as the main raw material, adding ultra-fine powder and other process ingredients to dry and form. It is to add alumina raw material into a dumping electric furnace to melt it into a liquid state, and the furnace is dumped at a certain angle to make the solution flow out of the pouring tank. Then the hollow alumina spheres, sintered alumina fine powder, and binder are mixed according to a certain proportion, formed and fired in a shuttle kiln at a high temperature of 1750°C. Alumina hollow ball brick is a high-grade lightweight refractory material. Its lightweight, high-temperature resistance, small line change, and excellent thermal shock resistance. It can be used as an insulation layer and can be used directly on the working layer.
Why do some high-temperature kilns use alumina bubble bricks? Now in high-temperature kiln equipment, the proportion of heavy refractory bricks used will be larger. However, in order to optimize the structure of some furnaces, it is necessary to reduce the weight of the furnace. The bulk density of high temperature resistant heavy refractory bricks is above 2.6g/cm, and the bulk density of alumina bubble bricks is only 1.1~1.5g/cm. Therefore, in the case of the same cubic meter volume, the use of hollow ball bricks can reduce the weight of the kiln body by 1-2 tons.
From the perspective of cost, the price of heavy bricks and hollow ball bricks are similar. The price of alumina bubble bricks for special areas may be slightly higher than that of heavy bricks. But in terms of weight, the use of hollow ball bricks can reduce 1-2 tons per cubic meter. Moreover, there is no need to make an insulation layer, which reduces the number of use and saves fuel. Not only the use effect is good, but the cost is also reduced a lot.
In addition, because alumina hollow spheres have good thermal insulation properties, reducing heat dissipation improves thermal efficiency, and the energy-saving effect reaches 30%. Therefore, some high-temperature kiln lining high-temperature zone or shuttle kiln lining all use hollow ball bricks, which is light in weight and has a significant effect.
Alumina bubble bricks have high aluminum content, low iron content, and low bulk density. It can be used in the working layer of the shuttle kiln and the tunnel kiln in the high-temperature area, and can also be used as the insulation layer in the high-temperature area.
The above is the reason why some high-temperature kilns use alumina bubble bricks. It can be seen that the choice of refractory materials for certain kilns not only saves costs but also needs to reduce the weight of the furnace body, as well as a good insulation effect. At this time, alumina hollow ball brick is a good choice. If you need to buy high-quality alumina bubble bricks, please contact the refractory manufacturer. Buy directly from the manufacturer, the product quality is reliable, and you can enjoy perfect customer service.