Tall aluminous qualitative adiabatic brick is the Al2O3 content that controls for main raw material with aluminous alumina do not be less than the adiabatic and refractory products of 48% . Its produce craft to use bubble method, also can use burn oneself out to add content way. The has poriferous structure adiabatic and fireproof product that basically comprises by Molaishi and vitreous photograph or photograph of glass of corundum get along with. Brick of qualitative heat insolation of clay of its function excel. Chinese standard (GB3995, 1983) presses tall aluminous adiabatic brick bulk density cent be LG-1.0, LG-O.9, LG-O.8, LG-0.7, LG-0.6, LG-O.5 and LG-0.4 these 7 kinds of brands. Tall aluminous qualitative adiabatic firebrick can be used at build by laying bricks or stones to build thermal insulation and erode without division of content of melt of intense high temperature reach erode the place of action. When be being contacted with blaze directly, the temperature of watch surface contact of general tall aluminous qualitative adiabatic firebrick does not get prep above 1350 ℃ . Mo Laishi pledges adiabatic firebrick can contact blaze directly, have high temperature resistant, intensity is high, energy-saving effect is distinct wait for a characteristic. Apply to roller of the furnace that heat up solution, hot-blast stove, pottery and porcelain kiln of drawer of porcelain of path kiln, report and the liner of all sorts of resistor furnace. The manufacturing technology of adiabatic brick is current, the production of adiabatic brick still is used extrusion and firing craft, form air hole thereby, use in order to achieve the density of a need and thermal conductivity firing craft, can control stomatic bulk strictly, assure its thermal conductivity thereby. Good adiabatic brick used hardwood sawdust, this kind of material is relatively rare, but after treating water, won't arise big in that way like cork expand quantity, because this controls its stoma dimension more easily, of course this will raise cost. A kind of clay and can light material interblend to close, if this is planted,can burning material is to curium not, so it can be in the structure imbibe, next sawdust will happen in water and clay expand, this process can last 1 considerate to a month. Mix this batch of raw material again and pass compress or extrusion. The brick after shaping is enraged into line space dry, be as a result of among them moisture content 25% ? 40% , the time with dry longer need. After dry end, the brick is sent oast, dry below 1000 ℃ . Be in firing link, shape the brick will be loaded kiln car, the brick puts caution in the code of kiln car, need is in of the brick all round the space with enough put apart in order to make sure air current is current, make sure sawdust burns adequately in oxygen at the same time. Heat rate is controlled closely also, avoid to happen temperature changes suddenly or sawdust burns inadequate. Cannot appear on component part not sufficient flaming carbolic trace. Accompanying dry and firing process, the bulk of adiabatic brick will be contractible about 30% . Adobe makes hexahedral brick body through machining, bricky dimension has accurate control here, the brick is in shape actually the form that air hole also can change in the process. We can think these stoma are small bulbiform hole, and be not in fact such. Below most circumstance, manufacturer passes standard brick (the 114mm one side of 76mm) of × of 230mm × 114mm will detect its thermal conductance, if pass 76mm, face, criterion heat conduction rate can rise 20% , because stomatic appearance produced a change,this is. Nowadays, stomatic structure of the brick can shape through epispastic craft. Among them chemical reagents, for example hydroted alumina or hydrogenous oxidation natrium, add in clay raw material, form the bubble that has heat proof quality thereby, because this uses this method, clay makings is pouring in epispastic mould, the mould can be a brick form or bigger board model. After adiabatic brick shapes, take out its dry and firing, next repass machining or cutting want form into all sorts of place. The advantage of this kind of production methods is: Because crop tall; does not seek plasticity target, can produce the adiabatic brick of low density. Defect is: Control stomatic dimension and stoma very hard to distributing. Because density is low, be able to bear or endure flake the gender also is reduced subsequently. If use foaming likely, produce foam through physical method, will get better product so, but stomatic dimension is controlled harder with distributinging meeting. Aluminous content is higher, classification temperature is higher, but basically increase as density, thermal conductivity is reduced, porosity also is reduced. 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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