High alumina refractory brick, a silicate refractory with an alumina content in excess of 48%. Alumina or other high alumina feedstocks are formed and calcined. Thermal stability, high refractoriness at more than 1770 ℃. Good slag resistance. High-alumina bricks are the most widely used types of refractory bricks, so the price of high-alumina bricks directly affects the total cost of enterprises.
An important characteristic of a high alumina refractory brick is the structural strength at high temperature, which is usually evaluated by the heavy softening deformation temperature. 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 Al2O3 content. The factory of high alumina bricks is divided into three levels according to the content of 3 oxide and 2 aluminum Al2O3: Level I Al2O3 content> 75%; Level II Al2O3 content is 60% ~ 75%; Level III Al2O3 content is 48% ~ 60% Al2O3 content, generally For example, three grades are divided into three high alumina brick price ladders.
The alumina content in high-alumina bricks is more than 48%, which is the raw material of neutral refractory brick manufacturers. Alumina or other high alumina feedstocks are formed and calcined. High heat resistance, refractory brick factory above 1770. With good slag resistance, it is used for furnace lining, glass furnace, cement rotary furnace, etc. The product has the advantages of high temperature creep, strong corrosion resistance, good thermal shock resistance and so on. Suitable for medium and large blast furnaces.
*Technical high-alumina bricks are more similar to cement clinker clay bricks. The difference is that the proportion of cement clinker is higher, which can be used as 90 ~ 95%, breaking through the sorting and screening of the previous clinker classification and iron removal. The firing temperature is relatively high, such as 1500 ~ 1600 ℃ when firing high alumina bricks in tunnel kilns. The refractoriness of high alumina bricks is higher than that of clay bricks and semi-silica bricks, and the refractoriness can reach 1750~1790. It is an excellent refractory material. The higher the fire resistance, the better the performance and the heavier the relative price.
