Intensity of compression of firebrick normal temperature (abbreviate is CCS) is the unit area that points to the material below normal temperature can susceptive great pressure. National level (GB ／ T5072, 1985) provided means of experiment of compression of compact firebrick normal temperature: Below normal temperature, with pressure testing machine the rate with the regulation, to the sample to load of set dimension, till sample ruptures. The big load that records according to place next and sample bear the area of load, computation its compressive strength. Next graphs are the intensity of normal temperature compression of a few commonly used firebrick. Intensity of normal temperature compression is one of main technique index of firebrick. Dead load of susceptive of place of fireproof in the common device that heat up labour stuff is not big, do not exceed 0.1 commonly, 0.2MPa, roof also does not exceed 0.4, 0.5MPa, roof of brick of hearth of large blast furnace, hot-blast stove, big load also does not exceed 1.0MPa, because carry,divide build with build by laying bricks or stones undeserved, make material suffers outside bump and squash and producing damaged possibly, because the normal temperature compression of material is strong,spend rarely inferior and destroy. The strength of normal temperature compression that firebrick all provides in active standard not under 10, 15MPa, to advanced firebrick the requirement is in 25, 30MPa above, because the intensity of normal temperature compression of firebrick is the parameter that its organize a structure,basically be, especially the sensitive parameter of microstructure. And the formation of the microstructure of material suffers his of all sorts of craft parameter in preparation process restrict, if the feature of raw material reachs burden comparing, grain size and grading, and the union between grain, shape method and agglomeration condition, have main effect to the microstructure of material. Accordingly, normal temperature compressive strength is to examine the reliable method of active craft state. Additional, the intensity of normal temperature compression that passes data but indirect ground assess is other and mechanical the actor bad of property, if the intensity of normal temperature compression of general firebrick is made an appointment with,lose strength to fight 2, 3 times, those who be tensile strength 5, 10 times; The strength of as higher as its normal temperature compression such as good wearability and impact resistance is relative should. And, determine the method of intensity of normal temperature compression is simple. Accordingly, the convention that intensity of normal temperature compression is judgement brick quality examines project. What kind of firebrick quality is about to decide very much the quality of brick of tall aluminous brick, clay brick, corundum of electric frit zirconium or silica brick probably, can press normally according to following a few respects undertake checking. One, the feature that after section knocks firebrick, examination brick section presents. Even shallow or inn yellow section, it is the normal token of silica brick and argillaceous brick, tall aluminous brick. Have black spot when discovery or the range that if these impurity distributing,black fusion hole compares is wider, although assume small drop position, have serious effect to the fireproof function of adobe. Much discovery of this kind of phenomenon is in half silica brick. The clay that contains a few free silica also has discovery in the brick. Because the iron in raw material is qualitative,amounting to kind of blemish is reductive below high temperature hind with adobe medium silica action makes melting point very low arenaceous acid is ferrous and of generation. Such adobe, fireproof degree want like that very low, be in 1550 ℃ more commonly the following (section shows the anxious color, grey black, person that see sound is ringing, fireproof degree of influence herewith) . In addition, some section present more gules stain. Because the iron in adobe is in oxidation tall iron character,this kind of stain is (the cause of Fe2O3) condition. The melting point of the Gao Tie of these free condition is higher (the 1560 ℃ of melting point of Fe2O3) , if adobe is medium other foreign matter is not much, fireproof to adobe spent influence compares low iron form (FeO) is weak. This kind of phenomenon constant with brick of elementary now clay in. Other, if section presents a few glassy frit scar, but bricky appearance does not have dross or enamel phenomenon, criterion scar of this kind of frit is raw material more after medium low frit impurity volatilizes via high temperature vestigial, it is fireproof to firebrick spent impact is not big. 2, when adobe of agglomeration degree firebrick achieves compact status, perhaps appeared more vitreous frit juice (if argillaceous brick reachs) of brick of 3 class tall aluminium, or the crystallization system growth inside base expands (like magnesia brick) or brilliant form change is complete (like silica brick) . Right now adobe presented index of old normal temperature compression. The adobe that has these character calls the firebrick with good agglomeration. With Chang Chun corporeal firing temperature is equal to this material to melt 0.8 times of temperature. The firing temperature of argillaceous brick is differ along with the firing temperature of argillaceous itself, but the argillaceous brick of tall agglomeration sex, firing temperature is in commonly 1300, 1350 ℃ left and right sides, of tall aluminous brick firing temperature is in commonly 1450~1500 ℃ , and of silica brick firing temperature can not amount to 1350~1400 ℃ between, of half silica brick firing temperature does not upright between argillaceous brick and silica brick. Going up a temperature the product that give is burned below the system, all have good agglomeration performance. If discover adobe section presents remarkable porcelain to change an appearance right now (fracture surface resembles shell, grain composition of the brick is divided by disappear) , express firing temperature is exorbitant, the fireproof property that explains this kind of brick expects is otherer in all the adobe of agglomeration is difference. Conversely, if discover the appearance of adobe and section present Song Shu to drop the phenomenon such as thick bead easily, in shape when pressure does not have a problem, what express adobe is firing temperature crosses low insufficient) ; The fireproof performance that explains this kind of brick expects relatively in all the adobe that he shows agglomeration only is tall. Also can compare the fireproof performance of different burden or different raw material normally according to the method above, be about to differ the base of the goods of burden or different raw material undertakes burning below identical high temperature, check its agglomeration rate. 3, the normal color of brick of surface color clay or tall aluminous brick is white, flaxen, deep yellow commonly, but contain iron taller person show nigger-brown. Odd the color from firebrick not well and truly differentiate the stand or fall of its quality. The goods of nigger-brown makes clear admittedly fireproof degree of nucleus is low, but what can not obtain bright product palely is fireproof it is certain to spend tall, because also contain impurity of a lot of white in this kind of goods, if oxidize,Potassium of calcic, magnesian, oxidation reachs hydrogenation natrium to wait. They are in inside firebrick when content is high, can make the color of goods talks some. Accordingly, when the quality that checks firebrick, divide a consideration in all outside exterior colour and lustre, feature of section of brick of combinative tall aluminium presses its agglomeration degree and preliminary sentence the stand or fall that decides firebrick function. 4, arris often discovers after outside blemish firebrick is firing, drop horn, bate to be out of shape, substandard of crackle, chap expresses blemish. Now the edge some the account that blemish produces and influence introduce respectively below. Because of,① takes off arris to drop horn is firing before the mark that green compact is carried or loading of kiln leaves carelessly. This kind of blemish destroyed the set dimension of adobe. Raised the area that knot agent takes off when adobe is used, namely the brick when bricklaying is seamed should like that bigger. Of bricklaying damage in often be being seamed oneself, begin, take off arris to drop horn so the intensity of will abate whole brick wall, reduce greatly to bricky life. The brick that takes off arris to drop horn is general build by laying bricks or stones is in an appropriate the minor position that builds thing. ② bate is out of shape: When adobe is firing, the increases solid to be able to add a brick strength of temperature and density, but in the bond in exceeding adobe (add combinative clay to wait) when the normal temperature that complete agglomeration place needs, will make the brick still happens to bate is out of shape and disappear the phenomenon such as grain composition of the brick. Such adobe will lose view scale completely inch, reason cannot be used. ③ crackle and chap: The generation of crackle and chap, to silica brick goods, be coessential abnormity arises to change intention in quartz and the cause of the internal stress that the volume of adobe produces the generation when expanding; To argillaceous brick and tall aluminous brick it is firing (or cooling) when, the temperature inside firebrick distributings not the place of too great stress that divide evenly place produces is generated. In the meantime, leftover water is divided when eliminating inside 150~200 ℃ limits inside adobe, if make adobe surface overheat arrives quickly 100~120 ℃ above, eliminate from adobe center institute, the steam of leftover in heat moisture is met at the same time overheat. The pressure of the vapor of the overheat inside the brick increases, produce crackle and chap possibly also. In addition, clay happens when agglomeration very about bulk changes (contractive) , and when firing when rate is too old, more remarkable, this also is the account that adobe produces crackle. The firebrick that has flaw not only intensity is poorer, and in be use process of harmful gas erode or be mixed by the solution of smelt metal erode slaggily created advantageous condition, the attaint open up to adobe wide wide way. Accordingly, have advantageous requirement, the attaint open up to adobe wide wide way. Accordingly, have the firebrick of crackle blemish, also cannot criterion build by laying bricks or stones is built in the main position that builds thing. The other side offers a product only, do not provide relevant technical service, how to do? The manufacturer with right choice is very important, the choice has the flourish Cheng Naicai of perfect after service, the hot project facilities that can let you does not have care in the turn back in moving, flourish Cheng Naicai is offerred custom-built, construction, carry out hind mixes fireproof material to defend a service character, it is one is the enterprise with client consider, consummate service truly.
Get Price
WhatsApp