Light-duty firebrick applies extensively in the furnace of high temperature kiln such as metallurgy, chemical industry, electron, glass, kiln roof ministry is structure of top of smooth condole of a kind of light simple fireproof stuff, can install condole to carry height on the head according to furnace temperature section, what can satisfy ceramic already is firing, narrowed again the temperature limits of shaft.
High temperature resistant requirement of technology of body of bricky build by laying bricks or stones? 1. Expand in the setting when seaming, escape accepts power position. Frame of body of heater and build by laying bricks or stones have opening inside body, body of build by laying bricks or stones expands outerly seam must not wear each other, fluctuation layer should stagger each other. 2. Be not circular arc hearth. A groove bottom is the longest, should with charging. Metal. The direction of going from place to place of broken bits or gas perpendicular or included angle. 3. Circular boiler setting should be built by central line build by laying bricks or stones, interior of body of heater is accorded with in error of diameter of sum of errors of line of furnace casing center when appearance asks, can use furnace casing to be built as spigot surface build by laying bricks or stones. 4. Circular boiler setting must not have three-layer or three-layer is seamed again, fluctuation reachs photograph adjacent two layers of two annulus seam again should not be in same position. 5. Arch and vault must be in same time is built by build by laying bricks or stones of semmetry of two arch foot, brick of the arch when build by laying bricks or stones is built does not get inversion, suo Zhuanjun must not call person cup one hand in the other before the chest from flank inside, if be on last brick, cannot lay a person from flank, above all, can what lock up buccal a side 1~2 piece brick machines a lock buccal fluctuation size is same, lock up what suit with photograph of the size that lock up a mouth again brick from above break a person. And both sides stems with armor plate; When the circle that tear open arch, must be on lock board hit entirely close. Arch leg part digs channel build by laying bricks or stones to build finish, after the nut that screws framework swallows the bait finally screws. 6. Build imprecise brick to seam to build by laying bricks or stones, should hit into laminose a place of strategic importance to tighten, especially but the kiln furnace of converter, every turn 1/4 circle wants to check, take afore-mentioned step, take afore-mentioned step.
Before project, must have made pair of construction staff groom and of construction process supervise, can make because of these small issues sometimes of kiln furnace move to be browbeaten with life normally. The article builds the problem that often encounters in construction process to undertake summing up as follows with respect to firebrick build by laying bricks or stones: (1) amlposition: Namely between the layer statified, piece inhomogenous; (2) tilts: Namely horizontal way is flabby; (3) ash seams not all: Namely ash seams width size to differ, can undertake modulatory through choosing a brick appropriately; (4) climbs slope: Namely annulus confronts the rough phenomenon with mural well-regulated face, should control stagger only 1mm less than; (5) leaves Chinese style: Namely tall aluminium pledges firebrick annulus and housing differ in body of arc build by laying bricks or stones; (6) cracks a law again: Fluctuate namely ash is seamed fold put, two between only concessional an ash is seamed; (7) connects seam: Namely horizontal layer, ash seams inside and outside to close, show metallic case even, do not allow; (8) dehisce: Namely grey gap is little in body of arc build by laying bricks or stones outside big; (9) takes off ash: Namely plaster is between the layer, mix between the brick with housing between not complete, inside the liner that cannot be used in fixed equipment; (10) wool seams: Namely the brick is seamed without draw the outline of, metope is sordid; (Bend of 11) move with the body on the ground: Namely N-joining. Fore-and-aft seam or transverse seam won't do to be seamed continuously, and wave shape bends; (Body of 12) build by laying bricks or stones rouses bubble: Belong to equipment to be out of shape those who cause, when build by laying bricks or stones is built, the relevant surface of equipment must undertake repairing. Liner of double deck of body of build by laying bricks or stones can be used at heat-insulation layer make level; (13) mixes an oar: Use undeserved, do not get use size.
To protect put oneself in another's position of aerification furnace casing, form space of high temperature reaction inside furnace, need to be opposite inside aerification furnace casing firebrick and light qualitative firebrick undertake statified build by laying bricks or stones is built, in order to reduce the loss of quantity of heat of the chamber of a stove or furnace, improve thermal efficiency. The service life of vaporization furnace basically depends on the service life of firebrick liner, and the liner to firebrick, besides want from processing. The respect such as method of chemical composition, agglomeration, temperature will assure outside, henan is fireproof material factory also should accomplish the following on the operation: 1. The temperature do one's best inside promotion furnace stable, avoid by all means drops unexpectedly. Because firebrick is in be heated and cooling process, the quantity of heat of furnace brick interior is delivered and the balance of each place temperature needs due process and time, if this one course is too short, inevitable meeting brings about brick each place difference in temperature is bigger, systole is inhomogenous, appear even safe hidden trouble.
2. roof pressure also smooth-going of do one's best, avoid by all means rises unexpectedly or drop. Because pressure cannot bear in the firebrick lining inside aerification furnace, it can be assumed by steel furnace casing only. In promoting step-down process, because react,pressure of the gas inside the area passes furnace casing from reaction space (step up) and react to aerification from furnace casing space (step-down) also be a process. So, want to assure the stability of furnace pressure, prevent firebrick to issue burst in greater pressure. Hydrosphere is washed because the operation is undeserved,water is met sometimes or appearance control is out of order and bring about vaporization flow backwards inside furnace. This kind of accident will make in firebrick lining broken, be forced to change. Highest temperature exceeds center of blaze of vaporization the chamber of a stove or furnace 1700 ℃ , accordingly, the fireproof sex of the lining inside furnace lining (liner begins frit lukewarm) must not under 1790 ℃ . Meanwhile, the liner of requirement firebrick is fought " urgent cold urgent heat " the number is high, the sex that fight broken bits is strong. Carry out a proof via production, use corundum brick is relatively appropriate. Main constituent is Al2O3, content is in the corundum brick of 95% above, al2O3 content achieves 99% above, with pure Al2O3 close. Brick of corundum of preparation of law of frit of commonly used report, its are fireproof degree reach bate degree prep above common corundum brick.
Build with respect to firebrick and build by laying bricks or stones of heat preservation brick, total principle is around center of aerification the chamber of a stove or furnace high temperature blaze is in build by laying bricks or stones to build the corundum brick with fireproof good sex, every brick stands by furnace wall gradually, its temperature drops gradually, ask to reduce to fireproof sex, and taller to demand of heat preservation performance, because this uses tall aluminous brick each layers. Argillaceous brick. Brick of light qualitative clay. The diatomite brick that pledges gently. Asbestine board. Build by laying bricks or stones of vaporization furnace liner (corundum brick) build by laying bricks or stones builds means to have two kinds: It is perpendicular build by laying bricks or stones (or say to establish) of build by laying bricks or stones, it is unexpected step (or call flat build by laying bricks or stones) . Use perpendicular type build by laying bricks or stones to build a method, can reduce corundum Shi Chu second dosage; And, bricky layer is thin, difference in temperature is small, consequently because stress is inhomogenous and create disintegrate appearance less. When overhaul, should change only most a inside can. However, because corundum brick layer is thick, average,temperature is in high temperature high, for long to fall, burn contractive degree again big, incidental from li of its closer layer brick fore-and-aft displacement, thermocouple bushing card lives, serious when bring about frit of whole brick layer to collapse. Although first time firebrick makes dosage less, but because above reason is easy the circumstance such as occurrence systole, displacement, bring about firebrick change the number increases, total dosage also may not decreases. Corundum brick is one of building furnace the earliest to use unexpected step method. However, because bricky ply is bigger, of the brick average lukewarm low burn contractive phenomenon again lighter, to every brick, its temperature distributings to be carried in blaze taller, near the one end of furnace wall, criterion temperature is inferior, compression strength is good, burn shrink degree is small, settlement is not apparent, make layer of whole corundum brick has good stability thereby, prevent or weaken the fore-and-aft displacement phenomenon of bricky layer. Although use the measure of firebrick for the first time bigger, but because its service life is longer, accumulate wastage and do not increase surely, the proposal uses unexpected step.
Because corundum brick price is high, to save the use of corundum brick, go up according to aerification furnace. Below 3 paragraphs of temperature distributing different, can choose the firebrick liner with different qualitative capable person. Common aerification furnace. Intermediate blaze temperature is high, the frit in firebrick lining collapses the time is much, still insist to use brick of high grade corundum. In aerification furnace bottom, because gas temperature is inferior, but instead is low the tall aluminous brick of fireproof sex. Ensure vaporization furnace service life. Temperature of face of the cliff outside gangue aerification furnace takes 80~150 ℃ commonly, but from reduce hear rate to set out, it is better to should take floor level to be worth, because this needs,use heat insulating materials or increase heat-insulation layer ply appropriately. Use this kind of method, although material is used up big, investment cost is high, but the heat loss due to radiation that can reduce the chamber of a stove or furnace, reduce specific fuel consumption thereby amiable bad news, additional, because the thermal capacity inside furnace is large (heat up inert big) namely, medicinal powder heat is little, can avoid furnace temperature wave motion, under photograph comparing, the operation goes to the lavatory neatly, excel of its operation technology economic norms comes loose heat furnace. The result shows, the cost of material of managing prep above of operation cost.
Build by laying bricks or stones builds the firebrick that finish after finishing, what to check and accept content to have? Build with firebrick build by laying bricks or stones after finishing, produce management department organization by owner unit, use branch chief. The fireproof composition that monitor member. The examination group that forms by construction unit chief and construction technology personnel, undertake checking and accept to fireproof material construction, check and accept minute of part: 1. Construction quality. Quantitative acceptance. Construction quality checks and accept include: The sort of firebrick, sort of firebrick and architectural exterior quality are checked and accept etc, check and accept should form written material, and by manufacturing ministry. Manufacturing unit. Construction unit countersign files. 2. Fireproof to the rest material undertakes checking and accept. Project the rest of fireproof acceptance of materials supplies a branch to organize by owner unit, production runs an unit. Use unit is participated in check and accept, the key is to receive already delivery of cargo from storage but not gone fireproof material, include among them: The amount of odd and fireproof material. Of loss state and odd material pack a circumstance again check and accept. Examination, the preparation that has made the rest of fireproof material retreat a library works, to construction the unit offers opinion of rewards and punishment, form written material, by the Ministry of Supply of owner company. Manufacturing ministry. Manufacturing ministry countersign files file.
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