Corundum brick is the fireproof data products that gives priority to brilliant photograph with corundum, alumina content is more than 90% . Intensity of normal temperature compression is high (can amount to 340MPa) . High load bate begins temperature (be more than 1700 ℃ ) . Good chemical stability is mixed to acidity or basic slag, metal vitreous fluid has very strong resistance.
High pure corundum brick. The industry such as the 2 class furnace of industry of the high temperature heating furnace that corundum brick applies extensively at metallurgy industry, hot-blast stove, petrifaction, aerification furnace, furnace that make energy of life, splitting decomposition furnace, pottery and porcelain, building materials, scientific research. The corundum brick on all sorts of kiln furnace gets not only the limitation of all sorts of craft conditions, erode and still be destroyed of high temperature, high pressure, slag and strong reductive gas. This kind of chemistry to corundum brick is eroded and the structure destroys the service life that lowered corundum brick. Solve for know clearly high pure the quality of corundum brick changes, statistic of intensity of compression of normal temperature of nearly 10 years of products detect result. Result 73~80MPa is occupied 18.6% , 81~90MPa is occupied 14.0% , 91~10MPa is occupied 23.0% , > 100MPa is occupied 44.4% . The heatproof shake function of the product also rises somewhat, good person can amount to 18 times (water-cooling 1100 ℃ ) . To prolong the service life of lining, latter development goes reaction furnace of fertilizer aerification furnace, carbon black to fight flake sexual corundum new product. Product manage turns performance: AL2O399.51% , siO20.15% , fe2O30.11% , na2O0.026% , apparent pore is led 18% , bulk density 3.20gcm-3, 133.5MPa of intensity of normal temperature compression, the heavy change that burn a line is led (1600 ℃ , 3h)0~0.1% , heatproof shake sex (1100 ℃ water-cooling) 23.
Combine agglomeration corundum brick. Combine agglomeration corundum brick, it is grain material with agglomeration corundum, with corundum fine pink mixes make pug. Shape, the product of stoving, fire calls agglomeration corundum product, also call corundum grog fireproof material. This invention made public point of the following crucial technologies: Containing mud high pure in agglomeration corundum goods, bead makings and fine pink should choose the pure corundum grog that has same part. To improve the heatproof shake of goods of common agglomeration corundum function is mixed the sex that fight broken bits, allow to join a quantity to be less than the 2nd constituent of 10% commonly, consequently Al2O3 content still is in 90% above, in corundum inside scope of fireproof material low cost. The 3rd kind of composition is given priority to with Molaishi, join means to have: Comprise Mo Laishi grog, also can join small concentrate of silicon, Bai Tu, kaolin, cyanite, silicon to wait. Make its are in firing Molaishi is formed in matrix part in the process. In addition, mo Laishi's composition is OK also grain is participated in among them, other additive all is the fine pink that is less than 60 micron. Choose H3PO4 to serve as bond, participate in a quantity to depend on the function of the product, wave motion is in 1%-6% . Shape to rise function, often attend right amount organic bond. The participation of fine pink is measured. Have apparent effect to the density of the product and intensity. Fine pink by 15% increase to 45% , the density of the product and intensity had very big rise. If be joined in fine pink of about 5% exceed small pink, be less than 1 μ MAl2O3, have important sense to producing those who taste function to rise.
How is agglomeration corundum brick formed? (1) appearance the product with mixed and disorderly, large volume, use air hammer to pound hit or oscillation shapes; 2) general product uses half dry high pressure to shape; The pattern that 3) special product uses special program static pressure shape. The corundum brick that combines agglomeration must fall in high temperature firing. Combustion temperature is 1650~1800 ℃ about, achieve 1850 ℃ sometimes. Carry high fever to be able to increase the intensity of the product and density into temperature appropriately.
Combine brick of electric frit corundum. What is the union of brick of electric frit corundum? Combine its and look of brick of electric frit corundum, preparation brick of corundum of frit of a kind of report. See the detailed introduction below please. Report fuses corundum is in when choosing corundum of electric frit palm or Bai Gangyu, want pair of report frit piece undertakes smashing, eliminate palm corundum piece in the ferrosilicon alloy of carry secretly or composition of other foreign matter. Bai Gangyu piece should purify piece the tall aluminium with crystal shape is acerbity the low frit content such as sodium. Because density is low, mineral and general surplus is in these impurity corundum frit piece the surface, allow legibility. Palm corundum contains a few harmful part. Brown corundum contains a few harmful part, can cause difference of goods agglomeration sex or craze, before be being used accordingly, answer its calcination. Not picked silicon ferroalloy becomes Fe2O3 and SO2 in 500~1000 ℃ oxidation, contain titanium mineral oxidation becomes TO2, bulk expands bigger. After pre-burning, the destruction that these oxidation reaction bring stress is eliminated in pre-burning process, the reaction that because these impurity are mineral,prevents a product expands and craze. Combine the burden of brick of electric frit corundum, mix shape. Cooperate the place in brick of electric frit corundum with stock grain, answer to choose much grading to compare according to close caboodle standard, reduce intermediate grain, increase fine pink amount, be helpful for raising goods density and agglomeration. The adhesive that adds certain amount basically has the slop such as waste liquid of phosphoric acid aluminium, phosphoric acid, aluminous chromium, cellulose, pulp to mix even, moisture content makes an appointment with 3%-4% to need high pressure to shape, can get fine brick. Purity of brick of electric frit corundum is tall, agglomeration difficulty, need firing when ℃ of prep above L800. Commonly used firing equipment includes kiln of high temperature intermittence or cave dwelling of channel of small-sized high temperature.
Recombine of frit of report of brick of corundum of zirconium of electric frit union zirconium corundum brick is with AZS frit piece or electric frit AZS abandon a brick to be raw material, join a few kaolin or oxidation polymer to serve as bond. Below constant temperature, material of AZS report frit is oozy vitreous photograph, form Molaishi with adhesive, fired brick. Firing temperature needs 16001700 ° C. The chemistry of frit piece - photograph composition is very even, vitreous appearance content is less. The chemical composition of useless brick is inhomogenous, vitreous appearance content is high (15%)25%) ; The chemical part that combines a product shakes limits (%):AL2O350Zro2206030.SiO21420. Relative to brick of Yu Dianrong corundum and electric frit firebrick, vitreous photograph ooze decreases apparently, oozy temperature rises, heatproof shake sex is good, performance of high temperature machinery is good, have especially fight goodly creep and corrode function.
Brick of electric frit corundum is compact. Accompanying the rapid development of modern industry, the industry such as petro-chemical, metallurgy is higher and higher to its requirement, want to have high temperature strength not only, and should have good thermal stability and be able to bear or endure corrode sex. Accordingly, developed compact brick of corundum of 99 report frit, apply in heating furnace. This kind of brick is broken through somewhat on intensity not only, and there also was marked improvement in side of heatproof shake performance. 1. Development is compact brick of corundum of 99 report frit. Choose corundum of Australian report frit arenaceous (Al2O3>99.3% , siO20.2% , na2O+K2O0.2. % , porosity 6% , bead diameter 0.088~5mm, handle) through the strict craft that divide iron, make up by diameter of 6 class bead, classification in compulsive mixer mix, mix every time. 2~3min, wait for mix practice completely to all be ticked off, join right amount inorganic and organic bond to mix experienced 3min, rejoin Al2O3 small pink (10%~20%) mixes experienced 3~5min, put into clean container to expect tiredly next 24. ~48h. billet classics extrusion, the classics after getting off is dry processing, intensity can amount to 5MPa, base substrate loads fuel energy-saving high temperature pours blaze kiln, warm up speed is 30h for ℃ of room temperature ~700, 700~1100 ℃ is 14h, 1100~1800 ℃ is 5~7h, heat preservation 6~8h, stop kiln to cool to 900 ℃ , cool compulsively. Brick of corundum of 99 report frit uses afore-mentioned craft to be made, via detecting, function index accords with technical requirement completely. 2. Use a program. Brick of corundum of DGZ-99 report frit is the ideal liner material of furnace of aerification of high pressure of the high temperature in petro-chemical industry, accord with the technical requirement of furnace of aerification of ammonium of domestic of all kinds synthesis completely. Hopeful is in home replaces an entrance on furnace of aerification of pressurization of heavy oil of ammonium of synthesis of 300 thousand T 99 corundum brick, have good applied prospect.
Fireproof material occurrence craze, fall off, easy how to wear away to do? Flourish Cheng Naicai is dug from germ, the analysis gives real reason, travel of destiny of birthday of furnace letting kiln is longer! Zhengzhou flourish fills kiln furnace fireproof data limited company is engaged in be able to bear or endure service of timber production, research and development is old, welcome communication of technology of broad new old friend to reach seek advice.
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