The hot project facilities of the protective metallurgy of tall aluminous brick and other industry department, the state that has liner of brick of successive automata tall aluminium only and the system that have tall aluminous brick are protected, ability makes equipment runs reliably. The systematic safeguard of tall aluminous brick, front row pace is the thickness that liner often measures in use process. We had known those who a few kinds of methods can find out tall aluminous brick to mar speed, with naked eye, labeled atom, determine the method such as liner temperature. Excogitate laser to interfere an analysis now, can determine ply of remains of liner of tall aluminous brick, essence of life is spent definitely be less than 1mm. Often measure liner ceaselessly of brick of different area tall aluminium mar speed, the ply that can realize body of build by laying bricks or stones to use semifinished product is identical. The protection of tall aluminous brick has a few sides: (The tall aluminous brick of body of 1) cooling build by laying bricks or stones, replace liner completely till the fender that uses water; (2) fills with gush, daub, the method such as adhere, make the tall aluminous brick that mars a layer recovers from an illness; (3) reduces the aggressivity of eater; (Liner of brick of 4) tall aluminium, the regulation uses the standard specified number of temperature and aeriform system; (5) improves component part of body of build by laying bricks or stones and structure of system of build by laying bricks or stones, its purpose is to reduce thermomechanical stress. Function of tall aluminous brick suffers composition to affect the addition as content of the A1203 in tall aluminous brick, mo Laishi and the amount that firm kindly help secure the success of something divides also increase, glass decreases accordingly, the fireproof sex of tall aluminous firebrick and density also rise subsequently. Be less than when content of the A1203 in tall aluminous brick 71. When 8 ％ , the high temperature in tall aluminous firebrick stabilizes brilliant photograph is Molaishi, and increase along with A1203 content and grow in quantity. Be in to A1203 content 71. The tall aluminous firebrick of 8 ％ above, high temperature stabilizes brilliant photograph is Molaishi and corundum, along with 71. 8 ％ content increases, corundum estimates increase, mo Laishi decreases, corresponding land improves the high temperature capability of tall aluminous firebrick. A1203 content is more than the siliceous aluminium of 48 ％ to pledge firebrick a general designation is tall aluminous brick. Press A1203 content more or less to differentiate for 3 grade: I (A1203>75 ％ ) ; Ⅱ (A1203 is 60 ％ ～ 75 ％ ) ; Ⅲ (A1203 is 48 ％ ～ 60 ％ ) . Can divide according to mineral composition for: Low Molaishi is qualitative (include silicon line stone pledge) reach Molaishi to pledge (A1203 is 48 ％ ～ 71. 8 ％ ) , mo Laishi - corundum reachs corundum character - Molaishi (A1203 is 71. 8 ％ ) of one 95 ％ , corundum is qualitative (A1203 is 100 ％ of 95 ％ ～ ) wait for firebrick. Of tall aluminous brick firing temperature depends on the agglomeration sex of aluminous raw material. With fancy reach grog of I class alumina (bulk density ≥2. When 80g ／ Cm3) , the constituent structure of raw material is even, matter content on the high side, make base substrate easy agglomeration, but firing temperature range is narrower, easy had caused burn or undersintering. Use cake of grog of Ⅱ class alumina (bulk density ≥2. 55g ／ Cm3) when, because not come to what petrifaction causes 2 times,expand and inattentive effect, make base substrate not easy agglomeration, reason is firing temperature slightly tall. Use grog of Ⅲ class alumina (bulk density ≥2. When 45g ／ Cm3) , the organization is compact, a1203 content is low, firing temperature is inferior, general of brick of clay of grog of summary prep above firing the 50 ℃ of 30 ～ of temperature. Tall aluminous firebrick is firing in oxidizing flame. Because temperature of bate of loading of tall aluminous firebrick is — importance is qualitative. Experimental result shows it follows content of the A1203 in tall aluminous firebrick change and change: When A1203 content is comprised theoretically under Molaishi, the balance in tall aluminous firebrick is Molaishi - vitreous photograph. Mo Laishi content follows A1203 to increase and increase of content, loading bate temperature also rises accordingly. Tall aluminous firebrick fights thermal shock sex to be differred than argillaceous brick, 850 ℃ water-cooling circulates 3 ～ 5. Because the heat of corundum is expansile,basically be relatively Molaishi is tall, and the reason that amorphism changes. And I, the tall aluminous firebrick such as sexual comparing Ⅲ needs the shock of heat-resisting of tall aluminous brick such as Ⅱ some. On production, adopt the measure that adjusts pug grain composition normally, in order to improve the grain structure character of tall aluminous firebrick, improve sex of its heat-resisting shake thereby. In recent years, the tall aluminous firebrick that the synthetic cordierite that adds — destiny capacity in the burden of tall aluminous firebrick makes sex of tall heat-resisting shake, obtain apparent effect. The sex fighting broken bits of tall aluminous brick also increases along with what A1203 contains and rise. Reduce matter content, be helpful for rising fight aggressivity. The distinction of tall aluminous firebrick and argillaceous brick depends on tall aluminous firebrick having good performance characteristics, because this compares argillaceous brick to have longer service life, become one of firebrick with at present wider application of building materials industry. Can tall aluminous brick and clay brick photograph compare the 5 big characteristic of tall aluminous brick, outstanding advantage is fireproof degree reach loading bate temperature tall, as the addition of Al2O3 content, the function that fight broken bits is improved significantly. Specific and character, tall aluminous brick has following property. (1) is fireproof those who spend tall aluminous brick is fireproof degree mix than clay brick of half silica brick fireproof degree want tall, amount to 1750? 1790 ℃ , belong to advanced and fireproof material. Fireproof degree of effect that basically suffers Al2O3 content and sort and amount, fireproof degree rise as the grow in quantity of Al2O3 content. (Because temperature of 2) loading bate is tall the Al2O3 in aluminous goods is tall, miscellaneous quality is little, the vitreous body that forms Yi Rong is little, loading bate temperature is so higher than clay brick, but because of Molaishi crystallization did not form meshwork, temperature of reason loading bate still does not have silica brick tall. (3) thermal conductivity is tall aluminous brick has better heat conduction performance than clay brick. Its reason is ability of the heat conduction in high aluminous products very low glass photograph is less, and the Molaishi with heat conduction better ability and amount of corundum qualitative crystal increase, increased the heat conduction capacity of goods. (Stability of 4) heatproof shake is tall the interpose of heatproof shake sex of aluminous brick pledges at clay goods and silicon between goods. 850 ℃ water-cooling is only circularly 3? 5. Because the heat of corundum is expansile,this basically is relatively Molaishi is tall, and without brilliant changed reason. Current, can from the grain composition that improves product, the content that reduces fine pink makings and raise clinker critical size dimensions and grain grading, the heatproof shake that will improve product stabilizes function. (5) fights broken bits sex the Al2O3 in tall aluminous brick is more, adjacent at neuter and fireproof material, of can counteractive acid slag and basic slag erode, because contain SiO2 among them, the ability that fights basic slag so is some weaker than fighting the ability of acid slag. In addition, the sex fighting broken bits of high aluminous products still is in with goods the stability in broken bits is concerned. Generally speaking, shape through high pressure and high temperature is firing, the product that has inferior porosity has the taller sex that fight broken bits. 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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