A good grasp of the quality of raw materials and raw materials, processing of aerated concrete block

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Aerated concrete block material requirements is very high ground, if we use in the process of the materials used does not meet the standard materials, it will lead to block direct fracture or fried seam in the production process in the aerated concrete block We must control the quality of the raw materials. 
    First of all, our selection of the raw materials of the aerated concrete block which generally require higher silica content in the sand. This is because the higher the silica content, the chemical reaction is more adequate hydration products is higher. The best sand in the silica content of not less than 80%. Not only sand requirements texture pure fewer impurities, particle multi-angular, and requires a sand particle size distribution is better. The well-graded sand, can guarantee to obtain a more compact products, mechanical strength and durability of the products has a significant benefit. Such as the sand of the class with meet the following requirements is more ideal :0.063-0 .25 mm, particles accounted for 30% ,0.25-0 .5 mm particles accounted for 65% ,0.5-1 .0 mm particles accounted for 5%, and the largest particles is not more than 7mm, hollow brick is not more than 5mm. Clay content relevant to the manufacturing process, finely ground situation or dispersed uniformly fine clay content can be up to 20% -30%. Containing the larger particles or into a group of clay on the sand, if the grinding processing, screening, remove the clay group, to avoid in the autoclave does not have the strength and unstable clay into a stuffed, affecting brick water resistance, frost resistance. Aerated concrete block and sand-lime brick corresponding to the general requirements for the activity of the calcium oxide content of limestone, preferably not less than 80%, medium-speed lime, burned lime content is less than 5%, under the lime content of less than 7%. Will not in the forming of the products and MgO content of less than 2%. The basis of gray sand raw materials for high strength sand-lime brick, lime Ground. This is because the finer the lime, the reaction products is more, the higher the product strength. If you grind too fine, not only the strength not much increase, and the mill output to reduce energy consumption to increase, the cost increase is not worth. Quicklime must pulverized requirements, generally through 4900 mesh sieve, sieve is less than 15% -25%. Electric ear can be used to control the volume of feed to control the fineness. 
   The above is the use of different materials for aerated concrete block production should pay attention to the quality of raw materials which brief. For more information please contact us.