高铝质隔热耐火砖的特点High aluminum heat insulatio
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The high alumina heat insulation refractory brick is made of bauxite as the main raw material, and the content of alumina is no less than 48%.High alumina is qualitative adiabatic heat insulation firebrick, basically use bauxite mature simple, union dead earth is made raw material, mix into union jinghe sawdust, in order to improve product performance, add the fine powder of industrial alumina, corundum, silicon line stone, blue SPAR, silica, can make bulk density 0.49/cm3 above product.3 oxidation 2 aluminium content and bulk density, high temperature is different also, in 1250-1350 ℃, usually some of up to 1550 degrees. History of drum (see except hot fire products) process including the preparation of foaming agent, foam slurry modulation, molding, drying and firing of five parts.The improvement of firebrick quality can reduce the invasion and penetration of slag, ensure the composition and structure of chemical minerals of firebrick, improve the co-melting temperature, reduce the corrosion of firebrick and stabilize the operation of equipment.According to a certain proportion, water is added into the mixer to mix mud materials. After mechanical or manual molding, the residual moisture of the adobe after drying can be less than 0.5% before being installed in the kiln.In order to prevent the sharp volume expansion caused by polycrystalline transformation and the crack of the product, the slow rising and cooling speed is required during firing.The gasifier is an important equipment in the production of synthetic ammonia, which plays a very important role in the long period operation of synthetic ammonia production.Different parts have different manifestations, which are caused by different damage mechanisms.According to the different parts of the use of refractory bricks, there are the following main forms of expression (phenomenon):1.Refractory is widely used in metallurgy, building materials, chemical industry, ceramics, machinery, cement, boiler and other industries.According to the preparation process, it can be divided into fired brick, unfired brick, electric melting brick (cast brick), refractory insulating brick;According to the shape and size can be divided into standard brick, ordinary brick, special shaped turn.It can be used as high-temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects under high temperature.The manufacture of siliceous heat insulation brick is made of finely pulverized silica as raw material, and some waste siliceous brick or waste siliceous heat insulation firebrick powder, mineralization agent and incineration additive are added.Magnesia-chrome firebrick this is a standard firebrick made of refired magnesia and consisting of sintered magnesia and chromite.Mainly used for main sintering zone, upper transition zone and lower transition zone.