The Relationship between the Alumina Content of High-Alumina Refractory Balls and the Effect of Use
High-aluminum refractory balls are also called high-aluminum heat storage balls. The high alumina refractory ball is made of high alumina bauxite as the main refractory raw material, adding powder, additives, and binders, after proportioning, forming, and high-temperature sintering. The production process of high-aluminum refractory balls is similar to that of high-aluminum refractory bricks and should be determined according to factors such as the characteristics of raw materials and the required production conditions of high-aluminum refractory balls. The higher the aluminum content of the high-aluminum refractory ball, the fewer impurities it contains, the better the high-temperature resistance, the better the compressive strength, and the longer the service life. That is to say, the higher the aluminum content of the high-aluminum refractory ball, the better its use effect.
The use of high-aluminum refractory balls is closely related to the amount of aluminum. The higher the aluminum content of the high-aluminum refractory ball, the higher the density, the better the strength and high-temperature resistance. High-alumina refractory balls are mostly used in a 450m3 hot blast stove as a regenerator pebble bed, with a diameter of 50 and 60. In principle, high aluminum balls with 65 aluminum content are used, and diameters 40 and 60 are also available. Many high-alumina balls with a diameter of 40 are made by hand. This is because the diameter is small and it is not easy to form on the press.
The refractory balls used in the glass kiln are filled balls, which are all high-aluminum refractory balls or silica refractory balls with a diameter of less than 30. In recent years, high-aluminum refractory balls have basically been used with 50 diameter refractory balls, and 60 and 50 diameters have also been used, but the ratio is not much. At present, the diameter of 50 is basically used.
The aluminum content of high-alumina refractory balls is too low, and it is easy to stick during use and affects heat storage. Therefore, under normal circumstances, manufacturers use high-aluminum refractory balls with 65% aluminum content. However, if you choose high-aluminum refractory balls with an aluminum content of more than 70%, the service life will be longer.
If it is used on the upper ball bed of the hot blast stove, many manufacturers choose high-aluminum refractory balls or corundum balls with 80% aluminum content. Because of the high aluminum content, low porosity, high load softening temperature, high compressive strength, and good slag resistance. Refractory balls are not easy to stick in the ball bed area, and the better the use effect, the longer the service life will be.
Therefore, the higher the aluminum content of the high-aluminum refractory ball, the better the use effect and the longer the use period. To learn more about high alumina refractory balls, please visit our blog: https://highaluminarefractory.com/.
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