High Alumina Refractory Brick The Structure Of The Device
The alumina roasting roasting furnace is used to calcine aluminum hydroxide, High Alumina Refractory Brick which consists of a conical cyclone, a venturi dryer, High Alumina Refractory Brick a boiling roaster, 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, High Alumina Refractory Brick calcium silicate board and refractory fiber. Fixed, the entire device between the various devices connected to each other, High Alumina Refractory Brick constitute a sealed, the overall structure of a strong device.
The maximum furnace temperature is about 1100 ℃, High Alumina Refractory Brick the maximum pressure is about 12.5kPa, the maximum flow rate is 48.5m / s, High Alumina Refractory Brick the calcination time is about 30min, High Alumina Refractory Brick that is, the whole roasting process is completed at high speed and high temperature. As the hardness of the treated alumina material is large, 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. High Alumina Refractory Brick Therefore, it is necessary to meet the following conditions: , Wear resistance, high strength, High Alumina Refractory Brick good thermal stability, integrity and strong sealing.
High aluminum refractory bricks, that is, 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 Alumina Refractory Brick 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. High alumina brick manufacturers according to the content of alumina Al2O3 is divided into three grades: Ⅰ-Al2O3 content> 75%; Ⅱ grade-Al2O3 content of 60 ~ 75%; Ⅲ grade-Al2O3 content of 48 to 60%, generally Said the three grades will be divided into three high-alumina brick ladder.
High alumina brick alumina content of more than 48% are neutral refractory brick manufacturers of materials. Made of bauxite or other high alumina content of raw materials formed by molding and calcination. High thermal stability, refractory brick manufacturers in the degree of 1770 ℃ above. Good slag resistance, for masonry steel furnace, High Alumina Refractory Brick glass melting furnace, High Alumina Refractory Brick cement rotary kiln and other lining. The product has the advantages of high temperature creep, strong corrosion resistance, good thermal shock stability, High Alumina Refractory Brick suitable for large and medium hot air stove.
High alumina brick and multi-clinker clay brick production process is similar to the difference is that the proportion of ingredients in the clinker is high, High Alumina Refractory Brick up to 90 ~ 95%, clinker before crushing to be graded selection and screening iron, firing temperature Higher, such as Ⅰ, Ⅱ and other high-alumina brick tunnel kiln firing is generally 1500 ~ 1600 ℃.