Make tall aluminous brick with what make bond? Soft qualitative clay has better plasticity, accordingly, make tall aluminous brick use soft qualitative clay to make bond normally. But, the free Al2O3 in the free SiO2 in clay and tall aluminous aluminous grog produces Molaishi 2 times to convert reaction below 1200 ℃ , produce larger put oneself in another's position to expand, the porosity of silicon increases, intensity is reduced. Accordingly, the affiliation of pink of the clay in burden is measured with exceeding 5% advisable. In addition, make tall aluminous brick can use small pink of tall aluminous alumina to make bond; Or small pink of earth of will tall aluminous Ji and argillaceous pink are made up by certain proportion, preparation synthesizes Molaishi to make bond. With these bond all can be made so that do not have bulgy tall aluminous brick 2 times. Is brick of different grade tall aluminium firing what does temperature have to differ? Use blaze kiln fire when brick of tall aluminium of one class, 2 class, general and firing temperature is 1430~1450 ℃ , heat preservation 40h. Fire when brick of 3 class tall aluminium, firing temperature is 1390~1400 ℃ . If use fire of kiln of channel heat preservation 2, brick of 3 class tall aluminium, firing temperature is 1550~1560 ℃ normally. Warm up what speed lets raw material and product is different and different. The microtherm phase before 600 ℃ , should slow warm up; 600~1200 ℃ warms up speed but a bit fast; 1200 ℃ should be controlled into temperature to high fever warm up speed. Cooling phase also should be controlled drop in temperature speed. Loading of kiln of tall aluminous adobe (or car of loading of kiln) use paper-cover more commonly. To avoid firing when generation black heart, yi Ke uses side to install. Use blaze pit firing, need uses get roughly into shape of tall aluminous brick. If use channel pit firing, kiln car mesa can use level up of tall aluminous chamotte sand, every spread a rice husk between layer adobe. To make bricky battlements firm, flat tension wants in certain height brick of a mat. The height that load a brick is 650~1000mm commonly. Among them brick of 3 class tall aluminium installs bricky height but on the high side, one, brick of 2 class tall aluminium but on the low side. How much is apparent pore of tall aluminous brick is led? Apparent pore leads tall aluminous brick to say open pore is led again. The per cent of total volume of the bulk of the open pore in refractory products and product. Outside dividing demonstrate, the porosity that place of group of Chinese fireproof data weighs is to show apparent pore is led normally. Apparent pore rate is the main index that evaluates fireproof raw material or product quality, can reflect the compact rate of fireproof material not only, and return token its workmanship is reasonable. Outside dividing products of light simple fireproof data, low porosity raw material or product are simple to improving a product the quantity, mechanical strength that improves product, decrease to be accumulated with the surface of slaggy contact, prolonging service life is beneficial. The apparent pore of tall aluminous brick that home of tall aluminous brickyard produces Henan is led is commonly 22, 23 the left and right sides, also can manage according to tall aluminous brick of the client change index to ask to order control production. Tall aluminous brick regards the high end in fireproof material as fireproof product, the respect is waited a moment to having very big use in bldg. , the personage inside course of study points out, the quality of tall aluminous brick is having very big concern with its porosity commonly! So, the porosity that how reduces tall aluminous brick appears very important. To reduce the porosity of tall aluminous brick, from raw material choose, burden, till shape,mix, firing each working procedure should take corresponding step. The bibulous rate of grog of chosen alumina of one class tall aluminium in order to be less than 5% advisable, 2 class tall aluminium expects bibulous rate in order to be less than 7% advisable. Be less than water content the soft qualitative clay of 4% and aluminous aluminous grog mix fine grind. Mix fine crocus burden with this kind, can reduce adobe porosity. The grain grading when burden, thick in fine than be 4:2: 4Advisable, big grain should not exceed 5mm. The order of feed in raw material when batch mixing is as follows: Join thick grain first, rejoin sulphurous acid mixes 3min beforehand after pulp waste liquid, fine pink of rejoin tall aluminium undertakes mixture. Forbidden thick, fine grained makings is joined at the same time grind inside the drill that adds waste liquid of sulphurous acid pulp again to reduce porosity, zhengzhou flourish Cheng Naicai suggests, instead of will bosseyed pressurization is double-faced pressurization instead is double-faced pressurization, blow number also should differ according to quantity of feed in raw material and different. If use blaze pit firing, should adjust the position of aperture suction internal heat, make mid close, brim is rare, and close wicket place is added appropriately close, make difference in temperature of difference in temperature of kiln furnace fluctuation, inside and outside is not more than 20 degrees. 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, zhengzhou 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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