Porosity of light qualitative tall aluminous brick tall, thermal conductance sex of small, heat preservation is good and have particular compression strength, with thermal conductance low, thermal conductance is 0.291-0.582w/(m.k)(350 ℃ ) , the material of construction of body of heater with small thermal capacity, can save specific fuel consumption; In the meantime, because kiln furnace can rise gentle refrigeration quickly, can raise equipment to manufacture efficiency; Still can reduce weight of body of heater, simplify kiln furnace is tectonic, improve product quality, drop environmental temperature, improve labor condition. What is to pledge tall aluminous brick pledges tall aluminous brick calls tall aluminium adiabatic brick again gently gently. Alumina content is in 48 ％ above, main the light qualitative fireproof material that constitutes jointly by Molaishi and vitreous photograph or corundum. Bulk density 1.359 ／ of 0.4 ～ Cm3. Porosity 73 ％ of 66 ％ ～ , compression intensity 1 ～ 8MPa. Heatproof shake performance is better. Light qualitative tall aluminous brick uses tall aluminous aluminous grog to add a few clay normally, law or bubble law produce with gas after classics mill with slop form pouring, figuration, via 1300 ～ 1500 ℃ are firing. Also can replace partial alumina grog with industrial alumina sometimes. With the liner that builds kiln furnace at build by laying bricks or stones and thermal insulation, and erode without stock of melt of intense high temperature reach erode the place of action. When be being contacted with blaze directly, temperature of watch surface contact does not get prep above raw material of light qualitative tall aluminous brick produces 1350 ℃ to pledge tall aluminous brick all uses pink of grog of 3 class alumina, Al2O3 and soft qualitative clay commonly gently. Content of the R2O in 3 class alumina is 0.5 ％ ～ 2 ％ , firing temperature is between 1100~1400 ℃ . The basis experiments, the R2O in vitriol person can make photograph of Mo Laishi brilliant decompose, the R2O that has 1 ％ can form the vitreous photograph of 10 ％ and corundum, when R2O content is close to 2 ％ . Photograph of Mo Laishi brilliant tends disappear, and form more corundum and vitreous photograph, having catabolism to Molaishi because of R2O, the Molaishi in bringing about alumina is acicular the network structure that crystal alternates each other breaks down. Make Molaishi exists with Gu island shape in vitreous photograph, make bate temperature reduces loading to become poor with thermal stability. The R2O content with because this is right medium raw material wants special restriction, the technology noting an oar that makes foaming agent to using colophony acerbity sodium wants especially strict. TiO2 also is one of impurity with the higher content in alumina, in 3 class alumina, tiO2 enters vitreous phase more, reduce fluid photograph viscosity, be helpful for agglomeration, but go against the high temperature capability that improves light qualitative tall aluminous brick. R2O is in of aluminous grog advocate brilliant photograph all has bigger solid fusibility in Molaishi and corundum, fe2O3 begins solid frit in 1200 ℃ Yumolaishi, to frit of 1300 ℃ solid 12 ％ of 10 ％ ～ . And in corundum, 1200 ℃ make an appointment with solid frit 12 ％ , frit originallies about when 1400 ℃ 18 ％ . Below reducing atmosphere, solid fusibility is reduced, take off frit to enter vitreous phase easily. When pledging tall aluminous brick is used in reducing atmosphere gently, also should father to Fe2O3 impose restriction. Light qualitative tall aluminous brick just has not had adiabatic effect, still have the effect with energy-saving heat preservation, in order to reduce specific power consumption. Accordingly, the adiabatic insulation material with development high-powered application is heat of current a research. Tall aluminium gets together light brick and traditional light qualitative firebrick are compared, have the following advantage: (1) thermal conductance is low, fall in high temperature condition especially, thermal conductance is relatively inferior, heat preservation heat proof quality is good. (Sex of 2) heatproof shake is good, inside use temperature limits, the brick is not out of shape, do not flake. (3) differs according to utility, choose reasonable mechanical intensity, make pledge gently brick each function beautiful. (Higher loading bate temperature mixes 4) to be weighed lesserly burn metabolic ratio, pledge with similar material firebrick photograph is compared gently character, use temperature is higher, life is longer, safer. Fireproof material occurrence craze, fall off, easy how to wear away to do? Want to solve a problem thoroughly, need to be dug from germ, the analysis gives real reason, flourish Cheng Naicai is engaged in be able to bear or endure service of timber production, research and development is old, can solve all sorts of difficulty problems of liner of furnace of high temperature kiln, welcome broad new old friend to seek advice reach technical communication.
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