High Alumina Refractory Brick Anti-reduction Ability
With fused corundum, sintered alumina and industrial alumina as the main raw material, made of fire-resistant refractory products. With acid and alkali atmosphere and anti-reduction ability, High Alumina Refractory Brick good thermal shock resistance and so on. Can be used in the following long-term use 1700 ℃. The early 20th century, the early 60s, China Beijing refractory plant to foam production Al203 content of 90% to 92% of the refractory products. Since the 80s, Shandong Province, the second refractory plant, High Alumina Refractory Brick Fushun refractory plant to burn the material to produce Al203 content of more than 90% of the refractory products.
Ingredients based on the density of refractory products and physical and chemical properties of raw materials to determine the amount of various materials to join. Mixing with a mixing machine or a mud mixer, High Alumina Refractory Brick the feeding sequence is: High Alumina Refractory Brick polystyrene pellets part of the binder and water-powder-binder. The shape of the product is easy to grasp, easy to produce elastic after the effect of vibration molding and other forms of molding, or take the slurry casting molding.
Drying, due to polystyrene beads in the 90 ~ 110 ℃ volume surge, then the liquefaction, gasification, High Alumina Refractory Brick oxidation disappeared, most manufacturers of polystyrene ball puffing and then used for production, so the drying temperature Should not be too hasty, High Alumina Refractory Brick dry brick after the residual moisture requirements of less than 2%. Installed kiln with side code, firing low temperature stage should pay attention to the volume change of burned objects, according to the volume of refractory products and physical and chemical indicators to determine the maximum firing temperature, generally greater than 1600 ℃, can be higher than the dense brick firing temperature The
High aluminum refractory bricks, that is, High Alumina Refractory Brick alumina content of 48% or more of a silicate refractory. 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. High alumina brick is the most widely used class of refractory bricks. Therefore, the high price of high alumina brick directly affect the production costs of enterprises.
One of the important working properties of high alumina refractory bricks is the structural strength at high temperatures, which is usually assessed by the load softening deformation temperature. Also measured its high temperature creep to reflect its high temperature structural strength. High Alumina Refractory Brick The results show that the softening temperature of the load increases with the increase of Al2O3 content. The high-alumina brick manufacturers are divided into three grades according to the Al2O3 content: grade Ⅰ -Al2O3 content> 75%; grade II-Al2O3 content is 60-75%; High Alumina Refractory Brick grade III-Al2O3 content is 48-60% Said the three grades will be divided into three high-alumina brick ladder.