High alumina refractory bricks with more than 48% alumina combined silicate resistant materials. Formation and calcination of alumina or other high alumina raw materials. Thermal stability, more than 1,770℃。 has high refractoriness. Good slag resistance. High-aluminum brick refractory bricks are the most widely used type. Therefore, the price of high-aluminum bricks directly affects the production cost of enterprises.
An important characteristic of a high alumina refractory brick is the structural strength at elevated temperatures, which is usually evaluated by the temperature of the softening deformation. Its high temperature creep was also measured to reflect its high temperature structural strength. The experimental results show that the softening temperature increases with the increase of AI203 content. The high alumina brick factory has three levels of Al203 content: level IAI203 content > 75%; grade I AI203 content is 60% ~ 75%; grade II AI2O3 content 48%~ 60% AI2O3 content, in general, The three-level three-high aluminum brick price ladder.
The alumina content of high alumina bricks above 48% is the raw material of neutral refractory brick manufacturers. Alumina or other high alumina raw materials are formed and calcined. High heat resistance, It has good slag resistance and is used in furnace lining, glass kiln, cement rotary furnace and so on. The product has the advantages of high temperature creep, strong corrosion resistance and good thermal shock resistance. Suitable for large and medium sized blast furnaces.
The production technology of high alumina brick and cement clinker clay brick is more similar, the difference is that the proportion of cement clinker is higher, can be used as 90 ~ 95%, breaking through the sorting and screening of the previous clinker classification and iron removal. The firing temperature is higher, such as I, II high alumina brick tunnel kiln shooting is generally 1500 ~ 1600℃. High alumina bricks have higher refractoriness than clay bricks and semi-silica bricks, and the refractoriness can reach 1750~1790. It is a high quality refractory material. The higher the fire resistance, the better the performance and the heavier the relative price.
The choice of high-aluminum bricks can not only look at the price, but also combines his aluminum content and performance to make high-aluminum bricks play a vital role. It must be said that refractory materials are used to identify fine refractory materials with high quality and good performance. !
