Adventitious fireproof data also says to come loose shape is fireproof material, be by reasonable grading graininess comprise with farinaceous stock and bond, do not shape and firing and what use directly is fireproof material. Of adventitious fireproof material name a method a lot of, can mix according to the grain of compositive adventitious fireproof material farinaceous material names character, like tall aluminium qualitative, clay pledges and silicon qualitative adventitious fireproof material, also can name according to adoption bond, wait for adventitious fireproof material like cement, water glass, sulfate and phosphate. According to the construction characteristic of adventitious fireproof material, can divide again for fireproof concrete (irrigate makings) , but plastic (plasticity is fireproof material) , pound dozen of makings, spray expects, projectile makings and fireproof cement.
This kind of fireproof material not only craft is simple, and very convenient also when use, can form integral structure and improve the service life of fireproof liner. Current, adventitious fireproof material already was in the kiln furnace of the industrial department such as metallurgy, oil, chemical industry use extensively.
The fireproof material breed cent by its bond is indeterminate form cement union, chemical material union and clay combine fireproof material of 3 kinds of indeterminate form; According to construction method cent is fireproof and pouring makings, fireproof pound dozen of makings, fireproof but plastic expect with fireproof spray.
Indeterminate form is fireproof material from 20 centuries 70 time rise get developing quickly, its crop occupies the 50 ％ of 30 ％ ～ of fireproof material total output about, basically use at the adiabatic layer of furnace of heating furnace, soaking, heat treatment furnace, blast furnace and hot-blast stove, channel of blast furnace taphole, steel-making furnace gush fills and the liner of equipment of the fine outside the canister of electric furnace lid, bucket flourishing steel, molten iron, bag intermediate, furnace and chimney, in order to improve the service life of lining, realize construction mechanization. Use fireproof and pouring makings is prefab piece can use hoisting law to build furnace, in order to shorten construction is periodic.
Fireproof and pouring makings liner construction
1. reachs all sorts of material carry first the spot, pile up respectively, make good number;
2. will be forced the machines and tools such as mixer and vibrating head clears clean, install perch, try it is normal to move;
3. clears kiln furnace equipment, install all sorts of anchorage firmware, with adiabatic brick, fireproof fiber felt or pledge gently fireproof and pouring makings leave no room for manoeuvre heats up a layer;
4. is raised by liner design ply set pattern plate. Pattern plate in any case is propped up should firm, of wooden pattern plate inside the face should stick tarred brown paper, steel pattern plate should besmear engine oil, what assure liner working face in order to facilitate form removal is mixed is smooth. The pattern plate height of boiler setting must not be more than 1m, the place that there are burner and hole on liner needs to raise set loose tool;
5. batch mixing undertakes in compulsive mixer, by cooperate to enter mixer to work than asking to install all sorts of compound mix 1min, the chemical bond that adds clean water or mix up density next is again wet mix 2 ～ 3min. Fireproof to phosphate pouring expect the 1/2 that should increase bond dosage first undertakes wet mix, add again after unused 24h the rest of bond undertakes wet mix.
6. will be blended expect inside, center cloth, thickness of bed is 300 ～ 400mm. 2 ～ 3m keeps every other set a 3mm to expand widely seam, insert add plastic ripple board etc fill seam material. Blend makings should give out inside 1h.
Should use when 7. is pouring insert type oscillator or flat type oscillator. Vibration undertakes in inserting makings layer, vibrating head should be pulled continuously move, but must not hit anchorage firmware, adiabatic layer and pattern plate. After waiting for makings layer surface to return an oar, slow pull out vibrating head.
8. again when cloth is oscillatory, should insert vibrating head into oscillatory already left and right sides of the 100mm in the makings layer that pass, so that make,fluctuation layer forms whole.
9. construction should undertake continuously, but expand in liner seam place but the interval with longer be patient of.
10. irrigates in roof place pledge gently fireproof and pouring manual vibration should be used when layer of makings heat insulation.
11. condole hangs bricky metal bare and outer, adiabatic layer is not gotten its bury. Cement is fireproof and pouring makings shape after coagulating first, should enclothe careless bag to water conserve; Cement, chemical material and argillaceous union fireproof and pouring makings conserve falls in natural state, must not drench water.
12. drying-out asks to operate by drying-out curve. Drying-out time is 7d about. Answer before 600 ℃ slow warm up, 150, 350 with 600 ℃ when 1d of each heat preservation. After the moisture in liner eliminates basically, again from 600 ℃ slow carbonado to use temperature. The environmental temperature of construction is not gotten under 5 ℃ .
13. should shape everyday a batch of sample, place around kiln furnace conserve, with having quality inspection is used.
Fireproof pound dozen of makings liner construction
Shape liner is pounded with pneumatic pick hit or manual tamp. Pneumatic pick atmospheric pressure is 0.5MPa commonly, peen percussion frequency is 1100 times commonly / Min. Peen appearance is square, rectangle or circle, its area is ㎡ of 25 ～ 70c. When pounding dozen of liner, every time cloth ply is 20 ～ 60mm. Pneumatic pick should as perpendicular as makings face, peen moves continuously according to a direction, peen face is ordinal jackknife 1/3, every also want jackknife to pound between travel make. Every makings pounds dozen of 4 ～ 5 times continuously, after forming close-grained whole, fang Kejin issues a material all right. Before cloth, should will pound dozen of face to gather up wool, make an organic whole in order to make fluctuation layer makings is pounded, prevent statified. Construction should undertake continuously, if intermittent time is longer, answer to will pound the lid that make a range in time to father.
Fireproof but plastic liner construction
Section of layer of general part of one's job undertakes. Fireproof but plastic by the manufacturer extruding becomes adobe, pack with plastic cloth and paper box. Shape with tamp machine, wind pressure is 0.4 ～ 0.5MPa, peen percussion frequency is 600 times / Min, peen should add balata pad. Tamp liner wants to undertake continuously. Boiler setting is commonly erect. When wall system is more expensive, bottom paragraph should install the metal that prop up. Solder on furnace casing metal of anchorage solid brick is fixed, its center span is 400 ～ 600mm. Furnace casing is spread asbestine board, thermal insulation board or build adiabatic layer with adiabatic brick build by laying bricks or stones, height is 500mm about. Do not raise commonly when boiler setting construction set pattern plate, pound when liner only when making hole underside, just can raise set ligneous loose tool.
By liner working layer ply asks, ke Xianping spreads fireproof but plastic adobe, pound with tamp machine dozen, its requirement and fireproof pound dozen of makings construction identical. Next, the fault seams tile fireproof but plastic adobe is pounded make. Pound when liner when controlling seat of anchorage solid brick, install anchorage solid brick, again build by laying bricks or stones is built make an appointment with the adiabatic layer with tall 500mm, continue to be pounded up make fireproof but layer of plastic liner job.
In pound in controlling liner process, should stay beforehand set perpendicular expand seam, use plastic ripple board make fill seam material. The drill rod that is 4 ～ 5mm with the diameter at the same time is perpendicular open a steam vent at working surface, the deepness of aperture is the 1/2 of liner ply, pitch is 150 ～ 250mm. Reoccupy cuts the cut that seam a knife to give a level to expand seam, seam wide for 3 ～ 5mm, deepness is the 1/3 of liner ply, span is 1 ～ 1.5m. Pound when making roof liner, should raise along section of furnace long way set pattern plate, every paragraphs are 600mm about. Anchorage solid brick places card to hang girder in condole, its center span is 290 ～ 320mm. Fireproof but plastic adobe is establishing tile, with tamp machine perpendicular pound at bricky face dozen close-grained. Lay unfired brick again, continue to pound solid.
When installing anchorage solid brick, use as same as appearance of anchorage solid brick wood model first, be in fireproof after a model can be being hit to imprint on plastic layer, set anchorage solid brick again hang on girder. Of the brick go up the clearance between end panel and clamping apparatus, originally closely with chock, in case anchorage solid brick is mobile. Lay unfired brick then and pound dozen of roof liner. On roof liner, 2 ～ 3m keeps every other set to expand seam, non-working surface fathers with firebrick lid, prevent to run fire.
Whole roof liner is pounded dozen after finishing, natural conserve can be torn open one day model, brush with drawknife or iron gather up the surface wool. Be in fireproof but during plastic liner construction is intermittent, want to will pound the lid that make a range to father with plastic cloth, continue to apply man-hour to answer layer of dehydrate of surface of take out liner, just can spread adobe to pound dozen. Before drying-out, liner surface is like desiccate, should water embellish is wet, make steam vent and exterior stoma expedite, next drying-out. Drying-out time is 13d about, roast before 600 ℃ 10d; Since 600 ℃ , use 3d time about slow carbonado to working temperature.
Construction of liner of fireproof spray paint
The metal solders to catch hammer or gauze on preexistence furnace casing, will use forced mixer is dry in mix or doing the fireproof spray paint that mix to load spraying machine partly, with compress air (wind pressure is 0.1 ～ 0.15MPa) , will mix close makings send to nozzle, add right amount water or chemical bond and makings to mix, eject comes face getting in season. Nozzle is exported should as perpendicular as face getting in season, its distance is 1 ～ 1.5m. Spray liner should undertake continuously, every time spray layer ply should be less than 200mm. Minute of layer spray answers when liner is too thick, but after the layer has enough strength, undertake afore. After liner gush is over, make smooth working face in time, cleared spring back expects. The conserve of liner of fireproof spray paint and drying-out, with fireproof and pouring makings liner is identical.
Henceforth, the construction method of adventitious fireproof material, will continue to send towards pump pouring, mechanization of large prefabricated components is assembled, pound automatically hit and the way such as mechanical spray develops. Zhengzhou Rongcheng acts on the principle that bears the blame to the client, control the tall purity standard of magnesia raw material strictly, ensure magnesian carbon brick of production can be had good high temperature resistant function, the capability that fight broken bits is strong, can get used to a client the moving temperature of actual boiler, product quality was to get more of broad new old user mix reputably all the time support, welcome everybody the incoming telegram seeks advice and choose and buy, flourish Cheng Naicai will act on cordial attitude of attending to guests to the boiler that offers major is transformed and build program to you.
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