Fireproof and adiabatic brick and fireproof heat insolation are pouring expect the insulation material in belonging to fireproof material, with which good? Basically see use requirement and construction environment demand, will select right product. The firebrick of boarding lump heat insolation that light qualitative adiabatic firebrick pledges adiabatic firebrick fastens interior to have adiabatic property for poriferous structure gently, it is with the production of bricky form product and application among them extensive, reason calls light qualitative adiabatic firebrick again. Light qualitative adiabatic firebrick presses his to material pledges or make place undertake classify and naming with raw material normally. For example, pledge with clay, silicon and the light qualitative firebrick that waits for raw material to make character calls tall aluminium respectively brick of light qualitative clay, light qualitative silica brick and light qualitative tall aluminous brick. Listed below by made the raw material that light qualitative firebrick uses and composition list the sort of light qualitative adiabatic firebrick and characteristic. The production methods of brick of light qualitative heat preservation has commonly undermentioned a few kinds: ① becomes brick from cut of natural and poriferous light qualitative Yuan Yan directly; ② with natural or man-made is poriferous light simple stuff makes a brick for raw material; ③ joins the combustible of easy burn-up in pug, be like light ball of rice husk of sawdust, char, polystyrene; Or add sublimate substance, be like naphthalene, burn oneself out, poriferous structure is formed after volatilizing; ④ adds foaming agent in pug, be like colophony black, firing hind acquire poriferous structure; ⑤ adds carbonate, aluminium powder and hydrochloric acid in pug, reaction of chemistry of have the aid of gives off gas and form poriferous structure. Generally speaking, use ④ of ② ～ to plant the method is more. The sort that next light qualitative adiabatic firebrick introduce below and characteristic diatomite brick <1100 ℃ is made with natural and porous raw material, thermal conductance is small, heat proof quality is good Brick of light qualitative clay 1400 ℃ of 1200 ～ are multi-purpose can light legal system to build, use is extensive Light qualitative tall aluminous brick law of 1350 ℃ bubble produces 1500 ～ , heat-resisting performance is good, use at high temperature heat insolation Brick of light qualitative corundum 1800 ℃ of 1600 ～ Al203 content is high, advocate brilliant photograph is corundum, can use below reproducibility condition Light qualitative silica brick 1550 ℃ of 1220 ～ loading bate temperature is high, thermal stability is good Calcic feldspar pledges gently brick bases is 1300 ℃ of 1200 ～ CaO, al2O3, si02, bulk density is small, be able to bear or endure burst apart the gender is good, stable magnesium is qualitative in reducing atmosphere 1800 ℃ of 1600 ～ heat-resisting performance is good, use temperature is high Zirconium stone pledges law of 1500 ℃ bubble is produced, use at heat insolation of superhigh temperature furnace Zirconia pledges law of <2000 ℃ bubble is produced, use at heat insolation of superhigh temperature furnace Heat of ℃ of cordierite qualitative <1300 expands small, be able to bear or endure flake performance is good Carborundum pledges 1300 ℃ are able to bear or endure aggressivity is good, be able to bear or endure burst apart the gender is good, high temperature intensity
Light qualitative adiabatic heat preservation is pouring expect one, light qualitative brick is arenaceous pouring makings in production of light qualitative firebrick, have the leftover material that a few misshapen reject or cut come down. Have 0.4g/cm3 by bulk density to 1.5g/cm3 a variety of level pledge gently brick, be like tall aluminous light qualitative brick, clay pledges gently brick, mo Laishi pledges gently brick, silicon pledges gently character brick, diatomite brick, abandon these the brick is broken expect into grain, all can do pouring the aggregate of makings, use the fireproof pink makings that pledges with material or aggregate to adjust pouring the bulk density of makings and function. Pouring batch pile accumulates density as broken the grain size after and bricky bulk density are different and different. For example, bulk density is grain of 20 ～ LOmm after the argillaceous brick for 0.8g/cm3 is broken accumulation unit weight makes an appointment with 0.47g/cm3, 10 ～ 5mm is 0.49g/cm3, 5 ～ 1.2mm is 0.58g/cm3, 0.2 ～ 0.15mm is 0.75g/cm3 left and right sides, reduce as grain namely, accumulation unit weight increases ceaselessly. In the likelihood the circumstance falls, magnify as far as possible critical particle size, can reduce so pouring the bulk density of makings, improve performance. Diameter of arenaceous big bead is light qualitative brick 20 or LOmm, if serve as spray paint to use even, big diameter is 5mm, the powdery makings that is less than 0.088mm should occupy 70 ％ above, want to achieve 90 ％ even. Extra other people basically is expander (cyanite, the) such as silicon line stone, the agent that decrease water (3 get together phosphoric acid natrium, MF, NF, NNO, JN, SM, sulphonating tar decreases the) such as water agent, return mix into to add light qualitative clay sometimes, dosage is 3 ％ ～ 6 ％ , have agglomeration agent namely, have the effect of bond again. Pledge gently pouring of makings make up with common and pouring material is basic and same. The light qualitative aggregate that wants to will said nevertheless is entered first forced in mixer, add the in part of water consumption first, wet mix even hind, add fireproof pink makings and cement to wait again, add the rest of water mixes practice. Pouring when, oscillatory time wants some shorter, avoid light aggregate rise to build composition layer. Making up light qualitative brick arenaceous fireproof and pouring when makings, to reduce bulk density, general mix into is added expand pearlite, ceramists and vermiculite, general dosage is 2 ％ ～ 10 ％ . Can be systole of the line after burning increases, intensity drops significantly. Accordingly, want a basis to use a requirement, reasonable make up pouring makings, make its achieve satisfactory result. 2, poriferous grog is pouring makings mix for aggregate with poriferous grog mingle makings, make up with bond, additive but of pouring heat insolation fireproof and pouring makings. Porous material, point to commonly artificial and prefab, breed is more, clay pledges, tall aluminium is qualitative, candle stone is qualitative, silicon is qualitative, contain zirconium to pledge, alumina is qualitative wait. Those who make up is fireproof and pouring makings bulk density is 1.o ～ 1.7g/cm3, use temperature is 1300 ～ 1600 ℃ . It is fireproof and pouring the important breed of makings. The production method of poriferous grog and relevant adiabatic goods produce a method identical or similar, specific there is the introduction in seeing subsequently adiabatic goods is made. Poriferous grog is pouring makings, press the demand that cooperates to compare, metage adds water to mix practice after all sorts of raw material, vibration shapes, form removal of natural conserve 1d, continue next conserve 2d, must not drench during conserve water, because blend water the amount is large, enough satisfies the need of to hydrate of tall aluminous cement. Cement dosage is much, stoving intensity is high, the intensity after high temperature is burned is low, it is better that mix into adds effect of alumina ripe pink. Below the condition that makes sure intensity asks, reduce cement dosage as far as possible, increase dosage of tall aluminium powder, still can see: Big grain is little, in grain is much, performance is poorer, reason should increase the proportion of big grain appropriately, perhaps put big grain to LOmm. 3, ceramists is pouring makings it is light aggregate with ceramists, pledge with ceramists pink or siliceous aluminium pink expects, what bond and additive are made up and become is pouring makings. Sometimes mix into is added a few light qualitative brick is arenaceous, float bead, expand the light aggregate such as pearlite and vermiculite, adjust pouring the bulk density of makings and its function. This kind pouring the bulk density of makings is 0.6 ～ 1.7g/cm3, use temperature is 800~1300 ℃ . Ceramists department uses Yi Rong clay, shaly, the raw material such as fly ash and gangue, the bulbiform and poriferous grain that pass to calcine and makes, be a kind enter admirably build light aggregate. Because the element such as ceramists raw material and to calcine craft is different, the grain unit weight of ceramists is different also, light ceramists can say in what float on water, heavy enter underwater say to attach most importance to ceramists. According to ceramists breed different, the high strenth ceramists that can make up different sort is pouring makings. In light ceramists pouring in makings, big diameter is LOmm but vibration shapes or the hand wipes construction, big diameter is 7mm also but spray works, mix into enters the grain of tall aluminous qualitative adiabatic brick, be helpful for raising use temperature. In light ceramists pouring in makings, ％ of 10 ～ 5mm30, ％ of 5 ～ 1.2mm40 and the light ceramists grading that are less than 1.2mm30 ％ , the accumulation density after mixing is 560kg ／ M3. When manufacturing technology is same, increase as ceramists dosage, dosage of tall aluminous cement decreases, water ash is compared increase, pouring makings bulk density drops, intensity also is reduced apparently subsequently. Because this is making up ceramists pouring when makings, ceramists and bond dosage should appropriate, reduce water consumption as far as possible, just can make up function admirable ceramists is fireproof and pouring makings. In heavy ceramists pouring in makings, the light ceramists dosage that enters as mix into increases, bulk density is reduced ceaselessly, stoving intensity drops apparently. Mix into enters the light ceramists under 40 ％ , stoving intensity grants greatly 22MPa, bulk density is 1.4 ～ 1.6g/cnq3, can satisfy the requirement of cement kiln. Heavy ceramists is to have not be over to burn the ceramists that appear completely, be in 2 times when to calcine, show commonly expand condition, its value can achieve 5 ％ ～ 20 ％ . Be in when heavy ceramists pouring in makings, it is OK that its expand quits and pouring the part of makings is contractive, made line systole is reduced or show slightly expand, won't make pouring expect generation expands or craze. Use soft qualitative clay and shale to mix wear ball, via the ceramists of 1450 ℃ to calcine, as a result of fireproof degree taller (1550 ℃ of 1450 ～ ) friend calls high temperature ceramists. Those who use high temperature ceramists is pouring makings say high temperature ceramists is pouring again makings. In addition, return useful high quality shaly ceramists, mix into adds a part to expand pearlite and float bead the ceramists of low thermal conductance is pouring makings, add clay of model of partial Gao Ke to raise intensity to return mix into. 4, expand pearlite is pouring stuff is ordinary of 5mm of the selection is big diameter expand pearlite serves as aggregate, the grain that is not more than 0.05mm does not exceed 10 ％ , silicate cement, tall aluminous cement, water glass, phosphoric acid, phosphoric acid aluminium as bond. Increase fly ash appropriately, float bead dosage, can rise pouring the intensity of makings. But bulk density increases somewhat, thermal conductance rises somewhat. Pearlite is pouring expect average use temperature is 600 ～ 900 ℃ , regard bond as OK and contented requirement with silicate cement, make up pouring when makings, should use pearlite water first wet, the rest of water are added again after mix is even, can go out after makings color is even makings. When shaping, assure oscillatory time, ensure compression ratio is 1.6 ～ 1.8, in order to ensure fireproof and pouring the bulk density of makings. 3d of adobe nature conserve, when ℃ of temperature prep above, damp conserve undertakes after coagulating first. 5, hollow ball is pouring makings choose and employ persons makes hollow ball, have alumina, zirconia, magnesian, mo Laishi, magnalium pointed spar, magnesian chromic pointed spar is hollow the ball do aggregate. Bond basically has alumina cement, combine clay, phosphoric acid aluminium and vitriolic aluminium, industrial oxidation aluminium powder or corundum pink do pink to expect, mix into enters additive or extra other people makes up but pouring material. Oxide is hollow the ball is pouring the characteristic of makings is loading bate temperature tall, strength is great, use temperature is accordingly high (be in commonly) of 1500 ～ ℃ . 6, float bead also belong to hollow ball, bead diameter is 40 ～ commonly 200 μ M, have certain active. Because pledge light can reduce pouring the bulk density of makings, become adjust pouring the extra other people of makings bulk density, dosage is 5 ％ ～ commonly 15 ％ . As float bead dosage increases, pouring the bulk density of makings drops, but compression intensity does not have apparent change. 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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