Refractory materials are indispensable lining materials in kilns, and high alumina bricks are one of them. Its role and market recognition are unquestionable. Almost all furnaces need to use high alumina bricks.
Product characteristics of high alumina bricks
First, let’s talk about the refractoriness of high alumina bricks. Compared with clay bricks and semi-silica bricks, high alumina bricks have a higher refractoriness, reaching an astonishing 1750-1790 degrees. This excellent performance makes high alumina bricks stand out in the field of advanced refractory materials and provides a solid guarantee for applications in various high-temperature environments.
Next, let’s focus on the load softening temperature of high alumina bricks. Due to the high Al2O3 content and low impurity content in high alumina products, the formation of fusible glass is relatively small. Therefore, the load softening temperature of high alumina bricks is higher than that of clay bricks, usually above 1420-1550 degrees. Nevertheless, since mullite crystals have not yet formed a network structure, the load softening temperature of high alumina bricks is still slightly lower than that of silica bricks. But this does not affect its stability and reliability in high temperature environments.
In terms of slag resistance, high alumina bricks also perform well. It can not only resist the erosion of acidic slag, but also resist the erosion of alkaline slag to a certain extent. Although the ability to resist alkaline slag is relatively weak, it is enough to meet the needs of most industrial applications.
Finally, let’s take a look at the chemical corrosion resistance of high alumina bricks. High alumina refractory products perform well in resistance to acidic or alkaline slag, molten metal corrosion, oxidation and reduction reactions. More importantly, with the increase of Al2O3 content and the decrease of harmful impurities, its chemical corrosion resistance will be further enhanced. This feature makes high alumina bricks have broad application prospects in the chemical industry, metallurgical industry and other fields.
