Fireproof material choose and buy basically considers 4 aspects:
1, clear boiler type;
2, the manage of familiar material changes target;
3, the position that clear and fireproof material uses, for example: Tornado segregator place, need to use firebrick of excel in wear-resisting, the agglomeration of rotary kiln is taken, need to use the firebrick that forms kiln skin easily, enter makings mouth and safety belt, need to use wear-resisting to reach be able to bear or endure the argillaceous brick that chemistry erodes;
4, consideration quality problem, can search the fireproof stuff that a few have quality management attestation to produce business, the fireproof product that purchases in order to ensure already accord with use requirement, and the high quality level that can keep for a long time stable.
The appearance of according to application has standard brick model (national level or it is smelt metal mark, build line out to have a demand) , the distinctive handicraft such as special shaped brick, particularity brick, big special shaped brick and its crucible, container.
The reason that press content is simple (this one relatively crucial, what clarity combines material of applicable what kind of in your kiln furnace must want when the choose and buy) can divide into soda acid to gender, neutral is changed and slant alkaline firebrick handicraft.
Divide into quality big firebrick and firebrick of light qualitative concrete by opposite density.
The organic chemistry of firebrick is mineral form classify.
The classification of firebrick has a lot of kinds:
(1) the basis is fireproof degree can divide for: Common firebrick goods (1580~1770 ℃ ) , advanced and refractory products (1770~2000 ℃ ) with fancy and refractory products (2000 ℃ above)
(2) can divide according to appearance and dimension for: Standard type turns, different brick, distinctive model brick, big surprise brick, and lab and industrial the special things such as crucible, Min, canal.
(3) according to shape craft can divide for: Slop is pouring goods, but model shapes goods of goods, half dry profiling, by farinaceous blame but model pug tamp shapes the goods of mould of makings of be in harmony of goods, You Rong.
(4) according to chemistry mineral can divide for: Silicon simple stuff, siliceous aluminous simple stuff, magnesian simple stuff, dolomite simple stuff, chromic simple stuff, charcoal simple stuff, zirconium simple stuff, special type is fireproof material.
(5) can divide according to chemical character for: Acidity, neutral and alkalescent firebrick.
(6) according to utility cent is: Steely industry uses industry of firebrick, glass to use industry of firebrick, power to wait with firebrick with industry of firebrick, nonferrous metal with industry of firebrick, cement.
(7) according to firebrick make can divide for: Agglomeration is made, electric frit is made, prefab and pouring make, fiber fold is made etc
Alkalescent brick, with magnesian, magnesian the firebrick that is main and chemical composition with oxidation calcium or oxidation calcium. Fireproof degree tall, fight basic slag ability strong. Basically use at smelting furnace of alkalescent steel-making furnace, nonferrous metal, glass and cement industrial kiln furnace etc heats up labor facilities.
Aluminous qualitative brick, show the Al2O3 content that controls for main raw material with aluminous alumina is not less than the adiabatic firebrick of 48% . Apply to roller of the furnace that heat up solution, hot-blast stove, pottery and porcelain kiln of drawer of porcelain of path kiln, report and the liner of all sorts of resistor furnace. Al2O3 content is the firebrick of heat insolation of corundum —— Mo Laishi of 82.4% , can use in lining of 1550 ℃ dirty.
Firebrick should have some character
Firebrick is in applied whole process, the effect such as the physics that suffers the generation below tall , organic chemistry, mechanical equipment, very easy fused molten, or by frit corrode empty corrode, or cause disintegrate to destroy wait for a state, make real operation is broken eventually, and smudgy raw material, consequently, people is being purchased or be when mastering some firebrick commodity, wanted unship to had listed character without fail.
1) is tall fireproof degree
Handle a regulation actually to blend in tall , firebrick should have the in enough Zuo to spend fall and changeless soft, infusible is characteristic.
The load molten with admirable 2) is spent
Firebrick can assume the load of kiln furnace and the crustal stress that handling flow middling effect, — is in Zuo is lukewarm fall to not be short of those who lose tectonic compressive strength to beg generation molten deformation and cave in.
3) has the cubage reliability below high temperature
Firebrick is in below Zuo lukewarm standard when application, because the physics of ministry of raw material is mirrorred, cubage can change very big. ' stipulates firebrick is in Zuo is lukewarm next cubage are smooth, unapt because pass,cause big splash goes up or furl makes wall of kiln furnace fill goes up because of the splash of handicraft and disintegrate, or because furl crosses large crack giving , reduce fill wall operating period.
The thermal shock dependability with good 4)
The real operation level that firebrick gets kiln heat is endangered very too, spend when transform substantially or wall of each position fill is encountered when heat is not well-balanced, ministry of of the body that cut a brick can cause crustal stress then firebrick fission, fall off, bring about boiler setting to destroy. Consequently, formulary firebrick is had must thermal shock dependability.
5) fights corrode sex admirably
Firebrick is in applied whole process, often suffer the oxidation of material of chemistry of substance of form of dirt of liquid aqueous solution, furnace, steam or solid state hard disk, make handicraft is corroded to destroy. Consequently, firebrick is sure to have resist by force this kind corrodes destroyed character.
Besides, formulary firebrick is had must wear-resisting function, have outside a few distinctive standards must breathe freely rate, diathermancy, conductivity and intensity, stipulate exterior design and specifications are exact together.
Of firebrick normally characteristic, include organic chemistry mineral form, mechanical character, thermodynamic character and tall use constituent framework, structure characteristic. Amid a few it is the character that measures in normal temperature condition, for instance hole rate, cubage is mixed relative to density, true density compression experiment compressive strength, according to this kind of character, can expect the applied state that firebrick leaves in tall . Additional certain it is the character that measures below tall , for instance fireproof degree, dependability of lukewarm cubage of the dependability of load soft spots, thermal shock, sex that fight broken bits, Zuo , this kind of character is reflected in must the circumstance that spends next firebrick to be in, or it is to reflect the correlation that spends it and next exterior effect in this .
The character of firebrick depends on character, this is the standard that comments on handicraft character, in making, be being produced is formulate and improvement process of treatment of of manufacturing technological process, check is appropriate and smooth basis. Use firebrick effectively, also want with its character as crucial ground.
The organic chemistry of firebrick is formed
A certain number of opinion character of firebrick are formed in the substance appearance at amid, spread all over the characteristic that reachs each phase, the organic chemistry that; depends on handicraft namely is mineral form. Be aimed at clear raw material, namely organic chemistry is mineral form must when, can use measurable treatment craft means, the content look that gets having some kind of characteristic is formed (like brilliant model, grain size, spread all over reach its to produce solid solution and sandwich glass identical) , in must the bottom is restricted inside the working content that promotes handicraft.
Organic chemistry forms the fundamental characteristic that is firebrick handicraft. Form the organic chemistry of firebrick commonly with its by each component water content effect is divided into two one part, take the main part with Jian overmuch namely - advocate component, with the appurtenant deputy component that occupies grain. Deputy component is raw material in as Central Africa of whole process of ginseng miscellaneous component and treatment craft often adds add component (accretion) .
1) crucial component
This is the component that chemistry of material of fire prevention of the composition in handicraft of fire prevention material reacts, the characteristic that is firebrick is basic. Its character and gross instantly the character of decision-making handicraft. Its key component can be compound, return the chemical matter that can be essence or type compound. Firebrick is pressed its advocate the physical property of component can divide a few kinds again.
The dissociate that firebrick of soda acid sex contains unusual number 2 oxidation silicon (SiO2) . Soda acid sex most the firebrick of is; of silicon qualitative firebrick basically by the oxygen of mine acerbity silicon of 94~97% (SiO2) composition. Clay pledges firebrick and silicon contrast character, oxygen of mine acerbity silicon (the quantity of SiO2) slants little, it is acidity. During half silicon pledges firebrick is in.
Neuter changes firebrick to father by its is carbolic qualitative firebrick exacting implication, tall aluminium makes firebrick (Al2O345% is controlled) be acidity and the firebrick that incline to neutral changes, chromic qualitative firebrick is to slant alkaline and the firebrick that incline to neutral changes.
Slant what alkaline firebrick contains unusual number is magnesian wait with hydrogenous oxidation calcium, magnesium pledges with limestone firebrick is to slant by force character alkaline, magnesium is fastened and vest in of firebrick of magnesian olivine qualitative firebrick and its needle spar slants infirmly alkaline firebrick.
This
Kind classify is rational to mastering the content of firebrick qualitative, resolution is in in application among them reach the oxidation state between firebrick and content of lay a finger on to have crucial and real sense.
2) residual component
The raw material majority of firebrick is pure natural mineral, what contain full amount in firebrick or raw material is residual, this kind residual it is effect of a few as can chemical as fire prevention material reaction then compound of reductive of character of material of its fire prevention or chemical material, the is solution medium that says commonly. Composition of magnesian qualitative firebrick is for instance medium advocate component is magnesian, other compound component all vest in is residual component. Because the solution effect of residual component makes of systematic software in all concentrated juice photograph changes frit into to spend more low, the volume of concentrated juice photograph that company solution changes heals much, and spend along with rise, quantity of concentrated juice photograph is added fast more fast, viscosity heals small, wetability has healed, effect of residual solution heals strong. This kind of compound is pressed to the solution effect compressive strength of Sio2 give out order rises.
CaO→FeO→MnO→ZnO→BaO, MgO→CaO→TiO2→Na2O→K2O→Al2O3→Li2O↑A few compound are right the solution effect of Sio2
3) adds component
In handicraft of fire prevention material production is made in, so that drive its to tall transforms and reduce to calcine to spend, add grain occasionally add component. Mix lookingly by its effect is different cent becomes acidification agent, thickener and to calcine agent to wait. Divide but outside burn down component, they include to be formed in the organic chemistry of handicraft in.
Detect according to the element, press the type that contains component and gross, can differentiate of handicraft or raw material pure degree, the organic chemistry characteristic of handicraft.
The burn that analyses handicraft of fire prevention material and raw material commonly reduces water content of medicine, various compound and water content of other and crucial component. The raw material of will dry impetuous spends what Wen Shipin adds to reduce per cent to say character below the standard to be decreased for bright in requirement .
The choice of firebrick appearance reachs the design of its dimension, the design of the liner of hot project facilities such as the industrial furnace pit that basically constructs on place build by laying bricks or stones definitely. Firebrick appearance and dimension must satisfy furnace kiln as far as possible the need of fireproof bricklaying, make sure build by laying bricks or stones builds an operation to go to the lavatory already, the performance characteristics that makes sure build by laying bricks or stones builds hot project facility again (if grade of sealing, adiabatic sex, bricklaying reachs service life,wait) .
When unit of furnace kiln design is undertaking fireproof bricklaying designs lining, should devise firebrick measure above all or choose the firebrick of standard measure directly, this job by from time to tome unit of furnace kiln place is assumed, assume by unit of the construction that build furnace or unit of furnace kiln overhaul directly sometimes. Furnace kiln designs an unit or be the has certain measure firebrick that furnace kiln builds unit place to design no matter, divide outside wanting to satisfy the operation that build furnace and service life, still must consider to whether when fireproof material factory makes this kind of firebrick, go to the lavatory, and this kind of brick is in shape, outfit brick and firing the percent of pass that waits for main production process to go up and final n are tall. Fireproof material
Go to the lavatory already the operation builds furnace operation, go to the lavatory again the model of the firebrick that fireproof material factory makes is very much, the unit that if every have furnace kiln to reach its,heats up labor facilities is respective custom-built design the firebrick that asks accord with oneself, need not say the whole nation so, the model of the brick of the same use that institute of plant of a fireproof material is accepted and produces namely will arrive more breathtaking degree. Firebrick model does not go to the lavatory too much, factory of not fireproof material prepared the many mould that make a brick redundantly. And brought very great difficulty to the intermodulation between firebrick factory border, management and computation. Because this is when design firebrick dimension, want to consider its generalization seriation and standardization.
Of furnace kiln design, firebrick order goods the construction that reachs the unit that build furnace prepares, want to undertake what using the calculation of respective firebrick amount. This kind of calculative is convenient gender and accuracy. Depend on directly the rationality of firebrick dimension. Tall aluminous brick
The dimension of every kinds of firebrick, from apparently look it seems that very simple, but each have its immanent regularity, it reflects a country to build the integrated level of production of furnace, firebrick and design. For example, the brick shapes approach the size that builds way (ply) , can reflect the ability of the machine that press a brick commonly; The measure series of firebrick and the concern that furnace kiln designs are very close, the height of furnace kiln bricklaying should be bricky ply (include a brick to seam) times more integral, ply of furnace kiln brick wall is due firebrick measure series (long or wide) decision; The dimension of firebrick itself decided its parameter.
To establish firebrick dimension set, draft the standard of firebrick dimension and the general regulation that establish firebrick dimension design, should explore the rule of firebrick dimension design and method of fireproof bricklaying calculation from theory and practice.
As radiation form the further progress of fireproof bricklaying, the concept of ” of quantity of change of radius of brick of a wedge reachs the “ that cooperates the radiation form bricklaying that build by laying bricks or stones builds to brick of two kinds of wedge computation undertook study, already confirmed “ from theory and practice quantity of change of radius of brick of a wedge is worth ” to decide, derived computation is formulary, found the pattern that the dimension between wedge brick concerns on this foundation. According to the metabolic rule that the dimension between wedge brick concerns, formulate and classics is authorized already released our country [magnesia brick and appearance of magnesian silica brick and dimension] , [open-hearth furnace uses appearance of aluminium magnesium brick and measure] , [blast furnace and hot-blast stove use bricky appearance and measure] and [general firebrick appearance and dimension] standard; Derived brick of two kinds of wedge distributes compared new computation form, wove for checking used our country all sorts of wedge bricks distribute the computational form of bricklaying each other.
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