Hollow ball brick and corundum not come to alumina stone brick belongs to alumina products of data of qualitative fireproof I, bases is 3 oxygen 2 melt aluminium, both manufacturing technology and brilliant resemble certain distinction, the price is different also, system of hollow ball brick takes 1.4-1.8g/cm3 closely, the system of Mo Laishi brick is in corundum closely 2-3g/cm3.
Alumina is hollow ball brick is with alumina hollow ball is main raw material, a kind of when become through agglomeration of 1800 ℃ high temperature light qualitative firebrick, belong to high quality heat insolation refractory products.
The feature pledges gently, high temperature resistant; The heavy change that burn a line is not big. Heatproof shake sex is good; Coefficient of thermal conductivity is low, have favorable heat preservation effect. Fight slaggy and gentle style to corrode ability strong; 6 it is managing the sources of energy.
The use temperature that uses pottery and porcelain of fireproof material, industry to wait for brick of liner of furnace of kiln of industry high temperature is in 1500 ℃ above; Heat up the heat preservation thermal insulation of labor facilities, wait like the petro-chemical aerification furnace, furnace that make energy of life. Manufacturing process
Alumina is hollow ball brick is with alumina hollow ball is main raw material, through joining industrial oxidation aluminium powder and binder, the course mixes agitate, suppress shapes, it is after stoving in kiln of type of shuttle of 1600 ℃ high temperature fire and into. Diameter of hollow ball bead is 5~0.5mm commonly, dosage is between 65%~70% , the alumina fine pink of 30%~35% , the binder of 5% . Workmanship: Collect makings is mixed even first, join binder and the small white that mix even beforehand next, pug classics is binding, pressure brace up shape, make measure by need, the nature after shaping places 12 hours dry, dry the brick after puts the fire in furnace of kiln of type of high temperature shuttle.
Look from composition and structure, have pure alumina hollow ball brick, Molaishi is hollow ball brick and grand of a place of strategic importance are hollow a few breed such as ball brick. Cooperate Molaishi and alumina brick of voidance heart ball, part of right amount 2 oxidation silicon is added in the powdery body part of material, in agglomeration process, a certain quantity of Molaishi is formed to replace corundum photograph in matrix, in order to increase bricky thermal stability. Agglomeration course is changed in high temperature nitrogen in, matrix of hollow ball brick produces alumina of union of grand of a place of strategic importance nitrogen converts reaction, form silicon aluminium - oxygen - photograph of nitride union matrix. Hollow ball brick has this combination alumina mechanical intensity tall, thermal stability is good, be able to bear or endure corrode performance is good wait for an advantage. Hollow sphere is to show the raw material such as alumina or zirconia fuses liquid, pour out of with fixed rate, use compress air to fuse high temperature the liquid is blown into small droplet, hollow sphere is formed below exterior tension and the action that leave mental efforts. Current home's commonly used main material has: Alumina pledges with zirconia character, alumina is hollow the ball is the main raw material that produces high-grade and adiabatic fireproof material, also be manufacturing alumina the main raw material of hollow ball firebrick.
Service instruction use alumina is hollow when ball brick, roast when warm up to had been not gotten fast, can produce crackle otherwise, reduce intensity, prolong service life. Do not contact with place of broken bits corrode commonly, lest cause damage because of broken bits corrode. The build by laying bricks or stones of slop of hollow ball brick of this alumina builds use photograph correspondence.
Corundum not comes stone brick is to point to namely by corundum and Molaishi advocate the tall aluminous firebrick that brilliant photograph comprises, corundum not comes stone brick is to point to the firebrick that makes with high pure or purer raw material. And among them the oxide of low melting point of foreign matter, will reduce its high temperature capability. Corundum - Molaishi bricky comparing is common the price of tall aluminous brick wants tower above a lot of.
Intensity of characteristic high temperature is high, high temperature resistant creep capability is strong, heat-resisting shake and corrode ability strong. The physics of Mo Laishi brick and chemical function are typical corundum: Al2O3 ≥ 85% , fe2O30.45% , apparent pore is led 19% , intensity of normal temperature compression is in 55MPa above, bate temperature is in 1700 ℃ above, add quantity of heat to change (1600 ℃ , 3h)0.1% , heatproof shake function (1100 ℃ water-cooling) be more than 30 degrees. Workmanship: With synthesis normally Mo Laishi brick makes corundum Mo Laishi brick, with Molaishi grain makings makes corundum Mo Laishi brick, with Molaishi grain makings makes corundum Mo Laishi brick, with pink of corundum of preparation of makings of Mo Laishi grain, with α - Al2O3 pink and electric frit or makings of agglomeration corundum grain make corundum noodles or vermicelli made from bean or sweet potato starch. It is binder with waste liquid of sulphurous acid pulp, press aggregate and powdery makings certain sequence to undertake making up by certain proportion and granuality. Mix completely even, use attrition to press bricky machine or hydraulic pressure to press bricky machine to shape.
When 1650~1750 Celsius, adobe is dry, next agglomeration. Some with aluminous alumina or frit of fine clay report or agglomeration corundum arenaceous make aggregate, mo Laishi brick sends the corundum that makes with this craft density is poorer, range of this craft application is accordingly wider, craft wants a place: Oxidize with industry the brick sends aluminium powder and pure clay, aluminous alumina or Mo Laishi of silica complex corundum density is poorer, especially alkali metal oxide, answer to be reduced as far as possible, with Mo Shi grain makings makes aggregate, heatproof shake performance is better, but corrosion resistance can be poorer, with corundum arenaceous make aggregate, corrosion resistance can be better, but heatproof shake performance is poorer. Utility: Basically use at tall wind lukewarm hot-blast stove, also can make vitreous frit kiln or kiln of fire of pottery and porcelain provide.
The brick has hollow ball brick and corundum Mo Laishi what is distinguished 1, raw material, hollow ball brick basically uses alumina alumina is hollow ball, corundum not comes main raw material is stone brick corundum, Molaishi; 2, brilliant photograph has distinction; 3, utility and price have distinction.
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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