Founding not comes stone brick how, by what to comprise?

Founding not comes stone brick is made by earth of tall aluminous alumina or industrial alumina, straw or silica, fused in electric arc furnace, next mould anneal. Its are main and mineral composition is Molaishi.


Brick of electric frit Mo Shi is raw material with tall aluminous alumina, by Molaishi sunlight is comprised (3Al2O3 · 2SiO2, character per cent is Al2O372% , siO228%) . Fuse about 2300 ℃ are controlled, pouring below 1850 ℃ in sand mold, next anneal eliminates stress. Advocate brilliant photograph is not otherworldly world and corundum, vitreous fill is between crystal. Its fireproof material than agglomeration more be able to bear or endure vitreous fluid is corroded, but not as fireproof as other report frit material. Join a few 2 zirconia (7%~8.5%) , can make Molaishi crystal decrescent, compact brick structure, mo Laishi content raises 60%~70% , reduce vitreous appearance content relatively, reduce product crackle. Mo Laishi brick heats up electric frit coefficient of expansion is small, heatproof shake performance is good, be able to bear or endure vitreous fluid is corroded. Frit of the report that make not comes when stone brick, in cooling process first crystal of separate out corundum, again crystal of separate out Mo Laishi. A few SiO2, al2O3, fe2O3, caO, mgO, na2O makes vitreous appearance finally. 25% what vitreous photograph takes a brick. It contains material of much low melting point, corrosion resistance can be so poorer than brick of other report frit. There still are bleb and reductive material in vitreous photograph, the meeting when using pollutes vitreous fluid.
Of Mo Laishi form the Molaishi that comprises by 3AL2O3.2SiO2-2AL2O3.SiO2 to change temperature to be controlled in 1827-1890 ℃ , hardness is tall. When liquid cooling of high temperature frit analyses a product however, generation is coarse inhomogenous product liability, founding product produces crackle easily. Be in low in all below the composition of frit mixture, the frit fluid liquidity after fusing is good. Even and tiny tie can arise to taste when analyse tastes Molaishi, reduce the possibility of cast craze. Accordingly, the composition of Mo Laishi cast should be compared in the quality of Al2O3/SiO2 when be 79/21. But aborning also should consider to a certain quantity of foreign matter part is contained in raw material, they fall in high temperature with Al2O3, siO2 produces reaction, corresponding ground changed Al2O3, the scale of SiO2. So the real value of Al2O3/SiO2 wants a few lower. Foreign matter not comes to founding the influence of stone brick basically includes: (The oxide of 1) iron and TiO2 are same, can enter Mo Laishi solid solution partly, not big to melting point influence of Molaishi, but vitreous appearance content increases, vitreous photograph part pales, fireproof function drops. (Oxide of 2) alkali metal affects Mo Laishi structure and frit fluid badly, can reduce Mo Laishi content, produce more glass photograph. (Although 3) oxidation calcium is affected not quite, but also have the effect that to block up Mo Laishi analyse tastes. (The effect that 4) oxidation model analyses a product to Molaishi under oxidation calcium. When a few existence, bluestone of lens aluminium pointed stone, change, corundum appears in the compound that analyses a product, reduce Molaishi's amount accordingly.
Mo Laishi brick and agglomeration not come to founding Molaishi includes the discriminative founding of stone firebrick commonly high pure electric frit Mo Laishi and Mo Laishi of average report frit. With agglomeration report frit Molaishi is compared, does the thick crystal of electric frit Mo Laishi achieve 1000~2000? High pure electric frit not comes Shiwei is grayish, mo Laishi of average report frit is deep gray (it is) of main raw material with aluminous alumina. Not come gently character what Shi Zhuangen occupies density is different, the brick basically divides Mo Laishi pledge gently for Molaishi brick and corundum Mo Laishi brick; According to the brand different, the brick can divide Mo Laishi for JM23, JM26, JM28, JM30, what the basis uses temperature is different, can divide for: 1350 Mo Laishi bricks, 1450 Mo Laishi bricks, 1550 Mo Laishi bricks. Pledge the function of Mo Laishi brick reachs application gently: Fireproof performance is good, can amount to 1790 ℃ above. Load bate begins temperature to be 1600~1700 ℃ . 70~260 of intensity of normal temperature compression million handkerchief. Heatproof shake performance is good. But agglomeration not comes stone brick and electric frit Mo Laishi brick. It is main raw material with tall aluminous aluminous grog, join a few clay or aluminous alumina to serve as bond, shape fire. Electric frit not comes stone brick is made by alumina of tall alumina, industry and saggar, join charcoal or coke grain to serve as reducer, legal system of reductive report frit is used to become after shaping. The crystallization of electric frit Mo Laishi is more than agglomeration Mo Laishi, fight product of agglomeration of excel of thermal shock function. Its high temperature capability basically depends on of alumina content and Mo Laishi photograph and glass distributing equably.
Electric frit not comes Shi Zhuanyuan expects one, raw material, use alumina of tall aluminous alumina, bauxite, industry and Mongolia earth to be raw material commonly. Aluminous aluminous raw material should warm-up removes structural water, avoid lunt to recount incident of make trouble of the hair when eliminating electric arc furnace centrally. 2. The right choice of burden is content of production Mo Laishi highest, corundum and the vital technology condition that vitreous photograph measures little founding product. Aluminous silicon coefficient (2.8-2.9) by Mo Laishi solid solution critical composition. But in process of high temperature melt, the volatilization of SiOi and reductive reaction can eliminate partial SiOi, make the content of horse of the Al2 in burden increases relatively. Accordingly, in actual burden, the effective control of aluminous silicon coefficient is worth under theory quite, general and desirable 2.5 the left and right sides. 3. Electric arc furnace is the main facility of melt. Use stationary and bend inclined. Bend uses formula single-phase or furnace of three-phase electric arc is commonly used produce at industry. Use system of low-pressure tall electricity, general voltage is 150-190 bend over, voltaic intensity is 1600-2000. Fused temperature is between 1900-2200 ℃ . Pouring: ? Cong of  of school of Tuo of P of where of string of Ji of all of Wu Chun of joyous ㄐ of guanidine of ⑷ of crane of  turn up soil enters hill Mao to blame  of  of scull of brigade Peng ⒆ to take string of Ji of all of ⑿ Wu Chun to seek  of  of  of  two V]  of provide for Yan punishs  to make an appointment with Tuo needs so. Heat treatment - general component tastes for the knot and anneal two phase: (1) knot is tasted. To goods of founding Mo Laishi, should make its in-house the knot tastes Molaishi for fiber shape or granule shape, distributing equably. Cooling rate is the main factor that decides particle size. Mo Laishi is a kind of consistent melt compound, direct from inside frit fluid caky, do not precipitate ahead of schedule corundum. But when the flux that certain amount should contain in frit fluid, fuse-element precipitates above all when refrigeration corundum, and Molaishi tastes body to begin to stabilize precipitation between 1750-1800 ℃ . Accordingly, should maintain the analysis begins to arrive inside the temperature limits of 1800 in melt content fast refrigeration, proper heat preservation gives time or sufficient and slow refrigeration below the temperature that beginning an analysis under Molaishi, so that the corundum object of inchoate analysis has enough time and frit fluid to form Molaishi together, make the Mo Laishi content in the product the biggest thereby. (2) anneal. Cast is in the cast refrigeration course that passes an analysis, come loose as a result of each spare parts heat is inhomogenous, produced greater stress, cause cast craze or edge damage, vertex damage thereby. Cooling rate is older, the liability of reject is bigger. So cast must cool slowly. Does anneal method have two kinds of: ? Liao of Yun hoarse ferociousing collect fights Yun of W of Zhen of hoarse of ┤ pliable but strong to neigh Liu sees exacting of Liao of M of cleanse Shi  alkyne of carboxyl of personal Mei mother scrupulously and respectfully captive of N of  of Chi of  of 3 S fierce Cong Cong of Mu Xike ＠ astounded of alkyne of carboxyl of  of ü of Yun of tip of this Yu flesh, ordinary control is in 60-70/h. Channel type annealing furnace is commonly used at anneal of exterior heat addition, cooling rate is controallable spend in 100-150 / H is the following, because model figure is not exact, pouring when fluctuation systole is abhorrent, mouth of generation shrinkage cavity, casting and exterior furrow, all need the ability after treatment to use. But cast hardness is tall, treatment is difficult. Emery wheel of thick bead diamond combines cut with phenolic aldehyde colophony normally.
Pledge value of Mo Laishi brick pledges gently gently quality of Mo Laishi brick is light, heat preservation effect is good. The tall purity that it is a kind of high quality is fireproof and pulverous. According to the scale that the product asks, add organic and compound filler, via vacuum extrusion, high temperature burns the product of light qualitative Mo Laishi that combines. According to the light qualitative Molaishi that different makings produces bricky basis differs norms alumina content is between 50%-80% . Click examine light qualitative Molaishi detailed parameter of the brick. Mo Laishi classifies a knot Mo Laishi brick and electric frit Mo Laishi brick two kinds. Make clinker with tall aluminous alumina, join a few clay or aluminous alumina to make bond, via shaping fire. Electric frit not comes stone brick is made by alumina of tall alumina, industry and saggar, join charcoal or coke grain to serve as reducer, legal system of reductive report frit is used to become after shaping. The crystallization of electric frit Mo Laishi is more than agglomeration Mo Laishi, fight product of agglomeration of excel of thermal shock function. Mo Laishi's high temperature capability basically depends on of alumina content and glass distributing equably. The characteristic of light qualitative Mo Laizhuan: 1. Thermal conductivity is low, thermal capacity is small. Purity is tall, matter content is low; 3. High temperature resistant, can contact blaze directly. 4. Intensity is high, heatproof shake performance is superior. Applicable: ? Inspect  of ⑹ of Zhen of benzene of rotten show off dash forward ⑻ of copy of ú of  ぁ ⒔ touchs children's hair of mother of archives of favour of blade of archives of umbrella ⒒  to stop ひ heart  lets fine long hair of Shu of  of ＠ of Sha of harmonious of all of Ping harmonious Qiang You Renpu of ⒓ of  of  of  of maltose  ⒆ float ⒕  , 63% , siO2:21% , zrO2:2In 1%) , the melting point of solid solution of this area Mo Laishi is 1830-1870 ℃ . Does the main raw material of brick of founding of Mo Laishi of the zirconium that make have: ? Melt of ⑻ of dysentery of  of ひ flute wholesale partner) of soda ash of A2O(of Jun of an old name for Japan of  of  of  of  ⑹  ; Some uses suppress of stone of unripe alumina, soft clay, zirconium to become preform, fire hind is broken to proper size. Mineralizer MgO is joined when founding, raw material is Al2O3/SiO2, ratio is between 2.2-3.2. Electric smelter is three-phase electric stove, the mould after fusing, delay is cold, plastic. This brick has crystal structure temperature of bate of compact, load good, normal temperature and high temperature issue sex of shake of tall, heat-resisting mechanical intensity tall, wearability thermal conductivity is good, good, fight slaggy corrode ability to wait for a characteristic by force. Molaishi applies founding extensively at furnace of metallurgy heating furnace, soaking, calcium carbide furnace to give wall of kiln of kiln of makings mouth, glass to wait.
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