Pledge Mo Laishi brick is gently with Molaishi (the expensive aluminous simple fireproof stuff that 3Al2O3 · 2SiO2) gives priority to brilliant photograph. General alumina content is in 65% ～ 75% between. Mineral composition divides Molaishi outside, contain alumina among them inferior person still contain a few glass photographs and Fang Shiying; to contain alumina taller person still contain a few corundum. The brick can use light qualitative Molaishi at liner of furnace of high temperature kiln directly, use extensively already at the liner of shuttle type kiln, roller path kiln, glass and petro-chemical kiln furnace at present. Pledge the influencing factor of function of Mo Laishi brick pledges Molaishi contains the foreign matter oxide such as TiO2, Fe2O3, CaO, MgO, K2O and Na2O normally in bricky brick gently gently, the matter content in the Molaishi that natural raw material produces should compare artificial synthesis raw material is tall. These foreign matter oxide have flux effect in Molaishi, the formation that reduces frit fluid temperature and viscosity, increase fluid photograph make an amount, raise frit fluid to be opposite the deliquescent speed of solid photograph and deliquescent amount, but the effect that each impurity oxide has loses by force level is different, form temperature to fluid photograph with K2O and Na2O among them the impact is big, k2O and Na2O make its nod temperature to reduce 513 ～ without variable respectively 724 ℃ , return an intention that discloses Molaishi at the same time. In these foreign matter oxide, the impact of TiO2 is little, make nod temperature to reduce 101 ～ without variable only 107 ℃ . When TiO2 when content is less, besides the part solid dissolve fashions finite solid solution in Molaishi, stimulative Molaishi is generated and crystal development is brought up outside, still the part enters fluid photograph to form vitreous body below high temperature. The Fe2O3 below high temperature has fixed firm dissolve to spend in Molaishi and corundum, fashion finite solid solution. Its solid dissolve in corundum is spent relatively those who be in Molaishi is tall, as a result of the formation of solid solution, make Molaishi and the crystal lattice of corundum grown. Fe2O3 to Al2O3 one SiO2 is material only then content of the Al2O3 in the influence of frit temperature and system perhaps says with Al2O3 ／ SiO2 ratio is concerned, when Al2O3 ／ SiO2, only then frit temperature is 1380 ℃ , when Al2O3 ／ SiO2>2. 55 when, only then frit temperature raises 1460 ℃ , therewith A12O3 content rises and rise gradually. Below reducing atmosphere, fe2O3 by reductive into FeO Tuo Rong enters vitreous phase, make of the system only then frit temperature drops, drop to be mixed to 1240 ℃ respectively 1380 ℃ . Anyhow, as content of the Al2O3 in Mo Laishi brick rise, its high temperature capability rises; And frit dosage grow in quantity, high temperature capability is reduced. Accordingly, control content of foreign matter oxide strictly, especially the content of K2O, Na2O and Fe2O3, it is to obtain high-powered Molaishi important step of the brick. In contain alkaline of kind of composition slaggy or gas atmosphere is medium use, to not coming the brick all has stone to erode action badly. Light qualitative Molaishi bricky item characteristics: 1, rate of low heat conduction, have;2 of very good effect of adiabatic heat preservation, light qualitative Molaishi frit of bricky low heat, because low heat conduction is led, mo Laishi series pledges gently the heat energy with adiabatic brick very few save up, energy-saving in intermittent operation effect is apparent;3, matter content is low have alkali metal of low-down iron box to wait for oxide content, accordingly, fireproof essence of dimension of tall;5 of intensity of compression of bricky hot condition, exterior allows the function;4 that spends the volume containing aluminium with tall higher; to make its still keep good below reducing atmosphere, light qualitative Molaishi, accelerate build by laying bricks or stones to build career, reduce fireproof mud to use an amount, assured the intensity of body of build by laying bricks or stones and stability, pledge Mo Laishi brick can process special form the life;6 that lengthens liner thereby, gently. Seam in order to reduce number of brick of build by laying bricks or stones and build by laying bricks or stones. Light qualitative Molaishi bricky classification: The bricky different and main component according to density is light qualitative Molaishi to be mixed gently character heavy qualitative Molaishi brick, according to using temperature different and main component is: 1350 light qualitative Molaishi brick, 1450 light qualitative Molaishi brick, 1550 Mo Laishi bricks. Pledge the function of Mo Laishi brick reachs his to apply gently: Fireproof degree taller, can amount to above of 1790 ℃ . Loading bate begins temperature ℃ of 1600 ～ 1700. Intensity of normal temperature compression 70 ～ 260 MPa. Heatproof shake sex is good. Have agglomeration Mo Laishi brick and electric frit Mo Laishi brick two kinds. Agglomeration not comes stone brick is main raw material with tall aluminous aluminous grog, join a few clay or unripe alumina to make bond, via shaping, firing and make. Electric frit not comes stone brick is raw material with alumina of tall alumina, industry and fireproof clay, join charcoal or coke granule to make reducer, law of reductive report frit is used to make after shaping. The crystallization of electric frit Mo Laishi is bigger than agglomeration Mo Laishi, heatproof shake sex is better than agglomeration goods. Their high temperature capability basically depends on the uniformity that the content of alumina and glass of Mo Laishi get along with distributing. Basically use at lining of blind angle of system of splitting decomposition of kiln of agglomeration of regenerator of kiln of frit of shaft of hot-blast stove roof, blast furnace and hearth, glass, pottery and porcelain, oil to wait. 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.
Get Price
WhatsApp