High Alumina Refractory Brick Structure Device
High Alumina Refractory Brick The alumina cycle boiling roasting furnace is used to calcine aluminum hydroxide from a conical cyclone, a venturi dryer, a boiling roaster, High Alumina Refractory Brick a feed screw, a fluidized cooler, a circulating bed, a discharge chute, Duct and flue. The shape of the equipment is basically cylindrical, the maximum equipment diameter is 5.8m and the height is 32m. The equipment shell is welded by steel plate. The lining is made of unshaped refractory, refractory brick, calcium silicate board and refractory fiber. Fixed, High Alumina Refractory Brick the entire device between the various devices connected to form a sealed, the overall structure of a strong device.
The maximum furnace temperature is about 1100 ℃, the maximum pressure is about 12.5kPa, the maximum flow rate is 48.5m / s, the calcination time is about 30min, that is, the whole roasting process is completed at high speed and high temperature. Due to the hardness of the treated alumina, High Alumina Refractory Brick the fluidity is good, the quality of the alumina product is strict, and the mixing of any lined impurities directly affects the performance of the product. Therefore, it is necessary to meet the following conditions: , Wear resistance, high strength, good thermal stability, integrity and strong sealing.
High aluminum refractory bricks: A neutral refractory with an alumina content above 48%. Made of bauxite or other high alumina content of raw materials formed by molding and calcination. High thermal stability, refractoriness above 1770 ℃. Good slag resistance. Used for masonry steelmaking furnace, High Alumina Refractory Brick glass melting furnace, cement rotary kiln and other lining.
High charge soft. Low creep high alumina refractory bricks are special bauxite. Fused corundum, fused mullite as the main raw materials made of high refractories. The product has a small creep at high temperature. Strong resistance to erosion. Thermal shock stability and other advantages, High Alumina Refractory Brick suitable for large and medium-sized hot air stove, which is China's new hot stove required high-quality, high-grade imports of refractory materials to open up a successful road, has been included in the national "Spark Program "project.
High alumina brick refractoriness than clay refractory bricks and semi-silica brick refractories are high, up to 1750 ~ 1790 ℃, are high-grade refractory materials.
B, load softening temperature
Because high-alumina products in the high Al2O3, less impurities, the formation of fusible glass less, so the load softening temperature than the clay brick, but the mullite crystallization does not form a network of organizations, so the load softening temperature is still no silicone bricks.
C, slag resistance
High alumina refractory in the Al2O3 more, close to the neutral refractory material, can resist the acid slag and alkaline slag erosion, because it contains SiO2, so the ability to resist alkaline slag resistance than acid slag weak.