What is the firing process of batu bata tahan api?

. firing process of refractory bricks is mainly the process of continuous dehydration and decomposition of kaolin to form mullite (3Al2O3·2SiO2) crystals. The SiO2 and Al2O3 in the refractory brick form a eutectic low-melting silicate with impurities during the firing process, which surrounds the mullite crystals. The highest temperature during the firing process is generally controlled at 1350°C to 1380°C. If the firing temperature of low-porosity clay bricks is appropriately increased (1420°C), the shrinkage of the refractory bricks will increase slightly, so that the density of the refractory bricks will increase slightly, and the low porosity can be achieved. reduce.