Fireproof material development, design and quality canal accuse intake air heater
The development that intake air heater uses brick of wear-resisting tall aluminium in recent years, cement produces an enterprise to using litter to replace clay, but be not worth as a result of SiO2 composition, so majority is the use proportion that increases silica. Accompany the addition of silica dosage nearly, coping of cement kiln intake air heater comes back stream implement the fireproof material all round wears away serious. Because the temperature inside furnace is very low, it is 5000 ℃ left and right sides only, so indeterminate form is mixed do not bake bricks to rely on agglomeration only unavailable enough strength. Excogitated the tall aluminous brick that tall aluminous brick does not burn before wearability excel successfully eventually. Brick of wearability tall aluminium, the phosphatic band that its wearability uses before excel far does not burn tall aluminous brick and carbonization silica brick. Produce is to be in combinative accelerant is added in what using phosphate to be united in wedlock not to burn tall aluminous brick before, firing, raised wearability from this. The wearability that uses firebrick to place of place of low temperature of intake air heater undertook evaluating. Assessment technique is, inside the platen that silica and sample put a person to rotate, undertake gyral, after achieving formulary time, determine reduce a size. Produce does not burn tall aluminous brick and carborundum brick photograph to compare with what use for comparing, wearability actor. Phosphate is joined before to fasten combinative accelerant in burning tall aluminous brick, in 1200 ℃ firing, from this producible the tall aluminous brick with a very good wearability. The wearability excel carborundum of this kind of tall aluminous brick measures the carbonization silica brick that is 50 ％ , thermal conductance is low also. Can say this kind of material suits to be used at cement kiln coping to come back character stream implement all round, wear away in case. Intake air heater designs a principle with the brick one, anchorage solid brick is the liner that prevents straight canister of intake air heater and housing come away, need installs anchorage firmware inside straight wall. Make up in housing anchorage solid is nailed namely, anchorage solid hammer latchs bury the anchorage solid brick that is set in the wall, anchorage solid brick pulled straight wall. On straight wall, certain span installs every other of paint firm brick a group, make straight wall and housing are stuck firmly receive an organic whole. This prevented straight wall and housing come away, avoided to happen collapse fall accident. 2, hold bricky board in the palm the diameter that large kiln does not use device is more than 5m commonly, height is in IOm above, of its liner expand quantity and thermal stress are very great. To decrease thermal stress is mixed facilitating overhaul, need distributes kiln line into section, install expand seam, this holds bricky board in the palm with respect to need design. Usually, the span that holds bricky board in the palm is less than 2. 5m; is less than 2m in high temperature area. Brick and adiabatic brick, firebrick holds a place of strategic importance in the aperture between bricky board in the palm to have small simple fireproof thing with on one. This absorbed heat to expand, prevented the damage of straight wall. According to type (12-1) , OK and computative reach expand seamed high S3 should satisfy next type. The S3 in type- - expand seam high;S- - firebrick heats up end to expand housing of quantity;51- - expands the big creep; Az that fireclay of quantity;52- - can offer- - the;h of hot coefficient of expansion of firebrick- - firebrick heat carries temperature;L- - hold; AK of bricky board span in the palm- - the temperature of the housing of; TK of hot coefficient of expansion of housing.
The characteristic that the quality canal of fireproof material accuses intake air heater to decompose intake air heater of kiln cement kiln beforehand is conduit much, node is much, difficulty of fireproof material construction is great however cement kiln difficult build by laying bricks or stones builds place. So intake air heater regards cement product line as the equipment with fireproof material sophisticated construction, the structure is not neat, conduit is much, hot project measures a place much, brick much, construction difficulty is great. Kiln end is fireproof material is main by fireproof and firebrick, pouring composition of makings, heat-insulating material. We come to be what appearance see next intake air heater first. One, the quality canal of heat preservation heat-insulating material accuses. What heat preservation heat-insulating material uses mostly is siliceous calcareous plate and beaverboard of pottery and porcelain, the control point of its construction quality is: Binder daub is even, stickup and firm, board with board between without large crack. In the construction of the spot, we often discover construction unit to did not use binder in perpendicular metope and conduit bottom, thermal insulation board is stickup not firm, when using vibrating head, thermal insulation board has fall off phenomenon. Thermal insulation board is used in coping place when, should originally with prison of colligation of fine iron wire, fall off easily otherwise, form removal hind can see white heat-insulating material in coping, leave accident snake in the grass to be being used normally. 2, finalize the design the quality canal of fireproof material accuses. When build by laying bricks or stones is built, every build by laying bricks or stones builds two S-1 brick, need build by laying bricks or stones to build brick of a C-1, and cannot follow build, appear easily otherwise some is planted the circumstance with the insufficient amount after the brick, especially the firebrick with model equipment little dosage, meeting influence build by laying bricks or stones builds plan. When build by laying bricks or stones is built, to make bricky line clingy thermal insulation, can use what the way that beats firebrick makes to stick close, spot construction personnel goes to the lavatory for construction, often can build used grey knife to beat with build by laying bricks or stones, although configured rubber hammer to also won't be used, this is unallowed in the construction of fireproof material, cause damage to the brick likely, affect service life directly. 3, fireproof and pouring the quality canal of makings accuses. Fireproof and pouring the construction of makings, should check anchorage firmware to whether solder first firm, whether do bitumen or bitumen lacquer besmear brush, this is basic. Pouring in makings construction process, have different requirement key in the light of different position. The coping of intake air heater is the key in construction and difficulty, coping pattern plate is propped up firm, if explode model, the likelihood causes safe accident, cause big effect to using labor. In construction process, those who need an attention is, pouring the moisture of makings is unfavorable join overmuch, can compare appropriately perpendicular and tilt moisture of partial construction much site, add water quantity to put manufacturer home to allow the upper limit of the quantity that add water namely. Pouring when answer many a little bit pouring, absolutely cannot with pouring big area, construction unit for save trouble, often use this kind of method, want to achieve this one goal, should want to join many moisture to increase like that irrigate fireproof and pouring the fluidity of makings. Of overmuch moisture join, can make pouring makings fine pink and aggregate are statified, reduce pouring makings intensity, immediate impact uses the effect, and can make pouring time coagulates to lengthen at the beginning of makings, affect form removal time thereby. Coping of carapace of eddy of intake air heater leaves have a lot of pouring aperture, can satisfy much dot to present the demand of makings, yu Zhen of the have the aid of when construction moves marvellous vibration, below the requirement that does not need to had joined washiness, fluidity can achieve construction demand quite. Hold door of bricky board, manhole, scaffold in the palm aperture and measure lukewarm measure control the position such as interface of box of aperture, spillage, because be bureau place buy only,use pouring makings, apply man-hour to won't prop up pattern plate mostly, use manual dressing, should notice right now, make with grey knife as far as possible pouring makings is close-grained, exterior level off, should not appear with bricky joint wrong stage. Smoke room also is a difficulty in the construction of kiln end, eliminate is fireproof material itself, construction also is to cause accumulate a of makings main reason. Each working face of smoke room, after fireproof material construction, as a result of the reason of pattern plate, inevitably conference appears in pattern plate joint prep above is pouring the moulage of makings surface, need polish right now, make pouring makings surface is slick, can decrease accumulate the formation of makings odds. A powerful person of only platform trap door or a powerful person of double platform trap door are pouring need to disassemble when makings construction, after construction is over, assemble again, disassemble pouring before should measure board of a powerful person and housing interval carefully, affirmatory and pouring makings ply, in order to assure pouring makings construction ends, a powerful person after be being assembled afresh board can normal roll. 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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