Hot-blast stove system sets the air cooling canal, sirocco canal, canal that mix wind, combustion to be enraged with clean coal be in charge of and support combustion wind canal, flow backwards cease wind canal. Air cooling canal should assure sealed, commonly used thick become for solder of armor plate of 4 ～ 12mm, the thermal stress that to because air cooling temperature is in,be eliminated the summer and hiemal differ and arises, reason sets adjustable group on air cooling conduit, the pillar that air cooling is in charge of should be far from adjustable circle, and the canal that go up holds pillar in the palm to ask with wind canal make survive receive, lest canal of cloggy air cooling is free adjustable. Sirocco conduit by make an appointment with the solder of common armor plate with thick 10mm to become, the sealing of requirement conduit is good, hot loss is small. Sirocco conduit uses standard firebrick commonly build by laying bricks or stones is built, inside brick of clay of build by laying bricks or stones or tall aluminous firebrick, outer firebrick of heat insolation of build by laying bricks or stones (brick of light qualitative clay or diatomite brick) , outer fill up asbestine board in order to strengthen heat insulation, large and medium-sized blast furnace still is in form of adventitious of conduit wall spray is fireproof material. Firebrick should the fault seams build by laying bricks or stones to build, the brick is seamed do not be more than 1.5mm. The sirocco conduit change because of temperature and pressure, caused system of conduit build by laying bricks or stones expand and contract, cause is common 3 ～ 4m keeps every other of 20 ～ 30 Mm expand seam, seam inside ram asbestine rope, two build by laying bricks or stones build inside and outside expand seam the position to want to stagger each other and must not take the put oneself in another's position of build by laying bricks or stones that is established in forked mouth and manhole. Use the moire connection that following plan institute show extensively to be in charge of at present, susceptive of place of component of metal of can remarkable slow down all sorts of stress, eliminate or slow down firebrick the damaged of body of build by laying bricks or stones, prolong service life. Mobile connection is used between sirocco canal and its pillar, pipe is held in the palm freedom allows on roller adjustable. The canal that mix wind is to stabilize hot air temperature and set, its according to the outlet temperature of hot-blast stove mix into person's a certain quantity of air cooling. If use double furnace parallel connection (one furnace is given priority to send, one furnace is deputy send) send wind, lukewarm each other of wind of on any account cooperates to adjust, can cancel to mix air cooling to operate. Flow backwards cease wind is in charge of (or sirocco diffuse is in charge of) it is installation actually the chimney on sirocco manager, its crust is become with the armor plate solder with thick 10 Mm. Because flow backwards aeriform temperature is very high, so bottom wants step a paragraph of firebrick, how to contain water-cooling valve, shut at ordinary times, flow backwards cease open when wind. Sirocco conduit uses Mo Laishi brick with conduit of sirocco of Mo Laishi brick is the aluminous silicon department that gives priority to brilliant photograph with Molaishi refractory products, use Molaishi to be the main raw material that make, add Ying Sha of clay, kaolin, zirconium and additive, via mixing refine, shape, fire of dry, high temperature and become Mo Laishi firebrick. Why does sirocco conduit use Mo Laishi firebrick normally the structure of sirocco conduit liner is, fireproof spray layer, fireproof fiber, light qualitative adiabatic brick and working layer firebrick. But this kind of structure is after put into production, line experience is in short-term inside occurrence craze, fall off, cause conduit aglow, be out of shape or other accident, affect sirocco conduit badly to use. Rong Cheng is aimed at this problem research and development a kind use technically at sirocco conduit to use tenacity Mo Laishi brick, replace groovy firebrick. The Mo Laishi brick of Rong Cheng research and development has certain tenacity and wearability below high temperature, can resist carbon monoxide atmosphere is permeated, it is the good product that layer of sirocco conduit job uses. Sirocco conduit uses character of Mo Laishi brick (temperature of 1) loading bate is high. (Performance of 2) heatproof shake is good. (3) has better thermal stress. (4) wear-resisting is able to bear or endure aggressivity can be good. Mo Laishi brick builds in build by laying bricks or stones of liner of conduit of sirocco of sirocco conduit utility with Molaishi bricky place has: Conduit is impending reach standpipe of orifice place, conduit and temperature taller straight canal, surround view and temperature to stabilize position, the class of Mo Laishi brick that different area uses is different, specific seek advice from Rong Cheng technology please. Sirocco conduit not comes with tenacity stone brick note 1, better to achieve use effect, sirocco conduit not comes with tenacity when stone brick build by laying bricks or stones is built, use assorted brick beforehand caul of build by laying bricks or stones. 2, when build by laying bricks or stones builds liner, use appropriate fireproof slop to cooperate build by laying bricks or stones of Mo Laishi brick to build. 3, the Mo Laishi firebrick that different position wants to use corresponding class, prohibit mixing use. 4, the Mo Laishi brick with exterior unqualified dimension taboo. The build by laying bricks or stones of firebrick of sirocco conduit combination builds sirocco conduit to combine firebrick to use standard firebrick commonly build by laying bricks or stones is built, brick of clay of lining build by laying bricks or stones or tall aluminous brick, outer brick of heat insolation of build by laying bricks or stones. Sirocco conduit often produces change wind, burn red wait for an accident. Hot-blast stove exit, sirocco supports position of canal and place of sirocco director join, director and annulus canal join, and expand the construction of telescoping tube place is complex, cause a brick easily to seam craze, expand the unfinished after seaming be heated joins closely completely, upside brick falls off etc. Temporarily measure is to be in cease the method that form a vesicle uses when wind undertakes remedying, but also can produce slop to flow into conduit inside or make fireproof material flakes wait for a problem. Want cogent solve afore-mentioned problems, henan is fireproof material factory proposal should be designed from body of build by laying bricks or stones, build by laying bricks or stones builds a method aspirant travel research. The expert ever combined firebrick build by laying bricks or stones to build a form to had had a test to hot-blast stove conduit. The experiment is in steel casing internal diameter is 2500mm, conduit internal diameter is 1500mm, undertake in the model of long 5400mm. The to sirocco conduit combination firebrick when the experiment made A, B two plan. Square case is become by circumferential direction seam build by laying bricks or stones to build, firebrick is in the conduit brick step that upside uses the key that take a lock inside 120 ° limits is built, upside of 120 ° expand slop of amortize of the fill in seaming, all by lining outward build by laying bricks or stones is built. B plan is wrong annulus build by laying bricks or stones is built, after firebrick build by laying bricks or stones is built, thermal insulation of front row layer is in upside is used inside 120 ° limits pouring makings pound dozen of construction, in upside of 180 ° expand slop of amortize of the fill in seaming. The speed that warm up in the experiment and cools is H of 50 ℃ ／ , warm up to inside exterior temperature amounts to 1300 ℃ heat preservation of one 1450 ℃ , heat, refrigeration and heat preservation in all 200h. In heat preservation 60, 70h, warm up namely 100, show after 110h expand greatly quantity, reduce gradually ever since. Of actual measurement expand the quantity calculates an amount for pure and circumferential even dilatometer 1.2, 1.4 times, to press coping sector bulgy computation or be out of shape elliptic computation is worth 0.74, 0.83 times (because firebrick brick seams the systole of slop to cause,the poor value between both assumes is, the shrinkage that the brick seams is 6, 9 ％ , according to the creep character of plaster, think this is appropriate. Because expand,the circumstance that seams a setting differs, of the annulus after expanding be out of shape also have a difference, because of this although plan of B of prep above of A plan temperature, of A plan expand the quantity still is less than B plan. Observation falls in hot condition, think A plan submits elliptical deformation form. When warm up, the front row thermal insulation of conduit of B plan sirocco expands the situation is bad, the result that disintegrate investigates is adiabatic and pouring the upside of makings suffers bend and destroy. In the body of adiabatic brick build by laying bricks or stones of conduit of square case sirocco, the brick is seamed also appeared interstitial. According to determining, inside body of fireproof build by laying bricks or stones exterior temperature is 800, when 900 ℃ above, of body of firebrick build by laying bricks or stones expand speed was decelerated. Because expand,the compressible rate that seams medium amortize slop is 30, 50 ％ , expand seam insufficient, have so want a change to expand seamed size. Use constrictive better fireproof cotton replaces amortize slop. Along section of direction of sirocco conduit length the setting expands seam, its interval is 2, 4m. Expand seamed size can decide according to the linear expansion coefficient of firebrick, can choose 20mm to control commonly. When conduit of design hot-blast stove combines firebrick build by laying bricks or stones to build, expand to do not make heat up air-valve be heated the action of stress, do not affect those who heat up air-valve to change, outside the flange that should make sure body of build by laying bricks or stones does not extend sirocco to raise a canal, control aspect of build by laying bricks or stones to flange direction expand. Accordingly, in sirocco place of the flange that raise a canal uses different firebrick build by laying bricks or stones is built, add close expand seam, shorten two expand seam the span between. Sirocco pays the join share of canal and hot-blast stove, reach its and the join part that sirocco is in charge of to drop firebrick easily, burn red furnace casing. Except add thick spray layer and adiabatic brick beyond, still used different firebrick build by laying bricks or stones is built, improved build by laying bricks or stones to build a method. Be highlighted in what conduit joint produces petaline form different firebrick easily or the craze attaint of horny ministry brick, still discover the horny ministry of firebrick of the part that raise a canal flakes at the same time, this kind of phenomenon can develop the desquamation of whole firebrick. Bear is the reason that part of the join that raise a canal damages greatly too. The canal is raised to get when sending wind the action of thrust, the change of force of conduit internal pressure, those who be equivalent to axial thrust is fluctuant, it has very big effect to the attaint of body of build by laying bricks or stones. 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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