Normally the production of brick of state indelicacy steel makes material have clay, tall aluminous brick, of Mo Laishi. 5 years ago, the returning that produces production clay to pledge is quite much, but subsequently character of stainless steel plank sets promote with each passing day, raised taller provision clearly to purity of stainless steel plank, do not produce what production clay pledges to shed steel brick for the most part nowadays.
In shedding steel brick to be used in bottom casting to irrigate steel commonly, the cause key that endangers purity of stainless steel plank divides two kinds:
In wanting to operate circuit by puddling, bring about;
2 puddling is brought about with fireproof insulation material, if shed steel brick when molten steel from steel store in whole process of infuse of ingot mould of water jar Xiang Gang, be sure to the basis sheds steel brick, spend because of the of molten steel taller, cause brick of steel of thermal convection current concussion sex, the share that causes construction of brick drifting steel then falls down, a molten steel still can shed steel brick to produce interaction power, reflective material ginseng is miscellaneous in molten steel, compromise the quality of steel ingot.
Some closer year those who produce production Molaishi to shed steel brick is relatively much, clay of major expanded reproduction is qualitative. The surface layer eyelet as a result of tall aluminous brick is very big and the orgnaization is relatively inattentive, high density of compose of fine personal computer of eyelet of surface layer of Mo Laishi brick is spent and surface layer has system of fiber shape crystallization, show construction of Internet report to the superior after accomplishing a task. What high density of this kind of report to the superior after accomplishing a task spends is tectonic, can of brick of steel of convection of hydro-thermal of steel of block the way deepen corrode. For must, in the whole process that passes in steel running water, molten steel can be mixed very easily the fireproof material of material of tall aluminous brick produces report.
Tall aluminium sheds brick of tall aluminium of steel brick another namer, its production is made with stick person brick to produce technological process close, different point is to match pink to brush grog of tall aluminous cement more, fireproof degree cross clay brick high, fight strong acid alkali to invade candle character pretty good, suit various kiln furnace firing the place application such as the belt. Qualitative brick drifting steel connects the felt of siliceous aluminous fiber that Al2O3 water content exceeds 48% call tall aluminium to shed steel brick. Those who press Al2O3 water content is how many division into districts wait for Ji for 3: I (Al2O3>75% ) ; II (Al2O3 is 60%—75% ) ; Ⅲ (Al2O3 is 48%—60% ) . The basis is mineral form can divide into: Low Molaishi is qualitative (include silicon line stone pledge) reach Molaishi to pledge (Al2O3 is 48%—71.8% ) , mo Laishi – is fireproof reach fireproof – character not Zuo stone is made (Al2O3 is 71.8%—95% ) , fireproof qualitative (Al2O3 is 95%—100% ) wait for brick drifting steel.
The argillaceous qualitative handicraft that brick of argillaceous shedding steel points to to Al2O3 water content is raw material of felt of aluminous fiber of 30%-40% silicon acid namely. Brick of argillaceous shedding steel is to use the soft model clay of 50% and grog of cement of clay of 50% good model, by must regulation of particle size distribution begins condiment, after classics figuration, dry impetuous, fire finishs in the tall of 1300-1400 ℃ . What clay sheds steel brick is mineral making a key is kaolinite (Al2O3·2SiO2·2H2O) with 6%-7% residual (the oxide of potassium, natrium, calcic, titanium, iron) . Clay sheds the fire whole process of steel brick, the key is kaolinite lasts moisture is deliquescent change into Molaishi (3Al2O3·2SiO2) the whole process of crystallization body. The SiO2 in brick of argillaceous shedding steel and Al2O3 are in fire whole process with residual generation in all the aluminous silicate that brilliant low dissolve nods, surround greatly crystallize in Molaishi body is circumjacent. Clay sheds handicraft of material of fire prevention of acidity of steel brick vest in, can resist soda acid sex is slaggy with system of steam of soda acid sex corrode, the resistance of alkaline to slanting chemical material is a bit weak.
The hot character of brick of argillaceous shedding steel is good, be able to bear or endure urgent cold urgent heat. What clay sheds steel brick is fireproof degree keep abreast of with silica brick, achieve 1690-1730 ℃ , but load molten is spent lower than silica brick however 200 ℃ left and right sides. Because argillaceous shedding is divided in steel brick,contain tall fireproof spent Molaishi is crystal outside body, still contain press close to the photograph of sandwich glass of noncrystalline of low dissolve dot of one most. Limits is spent in the of 0-1000 ℃ in, the cubage of brick of argillaceous shedding steel subsequently is spent rise and well-balanced splash goes up, linear expansion graph is approximate at this parallel, linear expansion rate is 0.6%-0.7% , can the half left and right sides of silica brick. Spend when after amounting to 1200 ℃ , carry again again lukewarm when, its volume goes up You Peng very great value just began furl. The rudimental furl of brick of argillaceous shedding steel causes the pine that fill wall ash seams to crack, it is the one whole blemish of clay brick. Spend when after exceeding 1200 ℃ , the low dissolve in brick of argillaceous shedding steel orders thing slowly melt, suffer interfacial tension effect because of grain content and mutual between lean too closely, cause cubage furl then. Because clay sheds the load molten of steel brick,spend low, furl is caused below tall , diathermancy is comparable silica brick small 15%-20% , concussion tenacity is poorer than silica brick also, accordingly, clay sheds steel brick to have the place of primary and secondary of communication of in order to only, be like store hot cell seals a wall, brick of small flue line and store brick of hot cell pane, mouth line brick, roof and its are elevatory brick tubal line.
Spread the applied trade of steel brick
Apply at steel of various alloy structure (include stainless steel board, each carbon steel) flat computer irrigates steel. Commodity is had fireproof degree tall, be able to bear or endure disintegrate sex is reached by force fight adhere sex strong. The exterior is orderly, drip essence of bright and clean, norms accurate, quality is excellent. The cast steel inside bag of manufacturing production steel brick of steel bag line, arc line brick, fire and did not burn brick of mouth of brick of head of a place of strategic importance, casting, brick and sleeve brick. High quality raw material, the treatment craft of extraordinary makes commodity has good tall physico-chemical character, be able to bear or endure erode, not deformation, do not fall down.
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