Brick of frit of Mo Laishi report its are main brilliant photograph is Molaishi, have fireproof sex strong, bate temperature is high, rate of high temperature creep is low, heatproof shake performance is good, acid-proof sex is strong wait for a characteristic, the aluminium that belong to silicon fastens refractory products.
The alumina content of Mo Laishi brick is commonly between 65%-75% . Alumina content is low mineral outside dividing Molaishi, still contain a few vitreous photograph and Fang Shiying; Of tall alumina content mineral also contain a few corundum. Apply to kiln of agglomeration of kiln of body of hot-blast stove roof, blast furnace, hearth, glass, regenerator, pottery and porcelain to wait.
Frit flint brick is made with tall aluminous alumina, mo Laishi (3Al2O32SiO2, al2O372% , siO228%) is made with different aluminous alumina. Fusion of about 2300 ℃ , 1850 ℃ sand mold is cast, anneal eliminates stress. Advocate brilliant is Molaishi and corundum, fill has vitreous look between brilliant photograph. Its photograph that fight fluid corrodes ability more fireproof than agglomeration data is strong, but not as fireproof as other melt material. Add a few zirconia (7%~8.5%) , what can reduce Molaishi is crystal, make bricky structure compact, make Molaishi's content achieves 60%~70% , corresponding ground reduced the content of vitreous photograph, reduced the crackle of goods. Electric frit not comes the hot coefficient of expansion of stone brick is small, heatproof shake performance is good, to melt glass erode have the stronger sex that fight corrode.
When with electric frit legal system of brick of frit of Mo Laishi report has, first crystal of separate out corundum, again cooling precipitation. The 2 oxidation silicon that remain, 3 alumina, 3 ferric oxide, oxidation calcium, magnesian, a few small hangover form oxidation natrium and other vitreous photograph. Build with brick build by laying bricks or stones, vitreous scale is 25% . Contain material of many low melting point, corrosion resistance can be inferior to other frit piece. Bleb and reductive material still exist inside vitreous body, the meeting when using pollutes vitreous fluid.
Mo Laishi is aluminous - silicon can be in in binary system the binary compound that often presses next stable existence, chemical type is 3al2O3-2so2. Mo Laishi is a kind of infrequent natural Molaishi, it is synthesis of labour of choose and employ persons normally, be like agglomeration or electric frit law. Academic group Al2O3 is 71.8% , siO2 is 28.2% , the compound that the Al2o3-SiO2 n duality that this is photograph of research MZ-65 extensive brilliant stabilizes in the system. Its melting point (90 ° of 1890 ° ) form in inclined Fang Jing, what crystal structure is as parallel as C axis aluminous oxygen octahedron is common prism, transverse appearance of substance of salt mine of silicon acid of the shape that show cable length, by tetrahedral and tetrahedral common prism composition, they join each other. When Al~(3+) content increases, the oxygen room in crystal lattice also increases subsequently, so Molaishi is a kind of alumina that distributing in order not saturated and reticulate structure. There is larger space on the structure, more inattentive.
Craft: A1xssi2-XO5.5-0.5x density: 3.16g/cm3 Mohs hardness: 6-7 fireproof sex: 1800 ℃ are very stable still, it is one kind discloses the admirable and fireproof data for corundum and liquid Mo Laishi in 1810 ℃ , expand even, thermal stability is tall, the softening point below heavy load is high, value of high temperature creep is little, hardness is tall, be able to bear or endure chemistry is corroded. Mo Laishi is one kind expands even, thermal shock stability is good, to load softening point is high, high temperature creep is small, hardness is tall, be able to bear or endure the high quality fireproof material that chemistry corrodes. Existing and high pure melt is Molaishi, common melt Mo Laishi, round-the-clock like that Molaishi mixes bauxite concentrate agglomeration burn Molaishi gently 3 kinds. Because AI203-SI02 is alone,one kind one is in the binary compound that often presses next stability, chemical type is 3AI203-2SI02, because natural moraine stone is very few, so artificial synthesis uses agglomeration or capacitance method normally. A1xSi2-xO5.5-0.5x density; Hardness is 3.16g/cm3;6-7 fireproof sex: 1800C is stable, 1810C is decomposed for corundum and liquid.
It is Molaishi, the chain certificate structure of a kind of different common, its C axis is outspread mix into columnar shape acicular. Alternate each other between Mo Laishi, form a solid framework, make fireproof material has a series of good performance, if hot intensity is high, bear the weight of bate temperature is low, heatproof shake performance is good wait; In addition, it still has momentum of high temperature squirm small, linear expansion coefficient is small, be able to bear or endure chemistry is corroded wait for an advantage. Linear expansion coefficient of Mo Laishi is small, this is its typical advantage. Below 800 ℃ condition, the line of industrial Mo Laishi bilges rate is average for 0.4% the left and right sides. The inhomogenous sex that to Molaishi through XRD axial expands had a test. Consider to discover, with mensurable agglomeration Molaishi is compared, of solid solution of Cr2O3, Fe2O3, Fe2O3 and melt Mo Laishi expand rate is inferior.
Whether is Mo Laishi even melt compound, studying alumina - the photograph of 2 combustion system balances silicon respect, put in controversy all the time. Test result makes clear, when high pure when stock is in sealed photograph to balance, mo Laishi is even melt compound; When impurity is contained in air, mo Laishi is inhomogenous melt compound. Serve as Molaishi so be not even melt compound, more agree with the real problem that analyses common silicate data. Mo Laishi regards fireproof material as industrial raw material, it is artificial commonly synthesize and become. Precious natural Molaishi mine is exiguous. In last few years, the development that Mo Laishi synthesizes raw material is used obtained great progress. Mo Laishi is normally pass agglomeration or become.
The manufacturing technology of Mo Laishi fired brick is similar to tall aluminous firebrick. With synthesis Mo Laishi grog makes grain, make grog of synthetic Mo Laishi with fine pink, or make with pink of Bai Gangyu, quartz and pure clay mix fine pink, make so that be equivalent to Molaishi's mixture. Grain and fine grained mix in proportion, common grain scale is 45%~55% , fine grained is 55%~45%(<0.088mm) . Mix is even, high pressure shapes. ℃ of hot-working temperature 1550~1600. Grog of Mo Laishi of complex of electric frit law, if be graininess, its firing temperature should be in 1700 ℃ above.
The content of Al2O3 can decide according to use condition, commonly used burden method is as follows: Synthesize Molaishi (agglomeration or melt) for aggregate + synthesize Mo Laishi pink; B(agglomeration or melt) synthesize Molaishi to expect for collect + synthesize Mo Laishi fine pink + high pure clay + Al2O3; The synthetic Mo Laishi that makes aggregate with electric frit white corundum (agglomeration or fused) + synthesize Mo Laishi fine pink + Al2O3 fine pink + high pure argillaceous pink. According to " the head is big, in small " principle, undertake a diameter comparing determine. Use sulfite oar waste liquid or aggregate chloridize aluminium or get together phosphate is binder, via even mediate, high pressure shapes, fire of high temperature kiln and into. Press computation of firebrick Al2O3 content, fire temperature is commonly between 1600~1700 ℃ .
The meaning of MZ65 of Mo Laishi brick not comes to agglomeration stone brick is with Molaishi (the expensive aluminous fireproof stuff that Al2O3-SiO2) gives priority to brilliant photograph. Aluminous quantity ≥ 65% . Alumina content is low mineral outside dividing Molaishi, still contain a few vitreous photograph and Fang Shiying; Of tall alumina content mineral also contain a few corundum. The fireproof sex of Mo Laishi brick is good, its temperature can amount to 1790 ℃ above. The bear temperature that has soft effect is 1600~1700 ℃ . Often press compressive strength to be 70~70~260 million handkerchief. Have good hear resistance. Quote: MZ-65 Mo Laishi brick. The manufacturer quotes now thousands of yuan / ton, the detail asks a phone to seek advice. Principle: The brick fastens MZ-65 Mo Laishi to be main raw material with aluminous grog, join a few saggar or unripe alumina to make binder, the fire after shaping and into. Bauxite price is in the mainstream rotary kiln of area of filial piety justice now 80 the left and right sides, 1420-1550 yuan / ton, 85-1820-1950 yuan / ton, december 88-2080 yuan / ton, the price is stabilized basically. 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.
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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