The firebrick inside rotary kiln kiln changes standard (rotary kiln of 1) 8000-10000t/d product line is firing the kiln skin of the belt is not stable area, transfer take firebrick thickness under 120mm, kiln skin stabilizes area firebrick ply under 100mm, window end is homebred fight flake bricky ply under 80mm, can consider to change (the appearance that condition of skin of the hot project characteristic according to kiln, kiln, firebrick wants when the examination is eroded circumstance and moving record undertake considering) integratedly. (Rotary kiln of 2) 2000-5000t/d product line is firing the kiln skin of the belt is not stable area, transfer take firebrick thickness under 110mm, kiln skin stabilizes area firebrick ply under 100mm, kiln end is homebred fight flake bricky ply under 80mm, can consider to change (the appearance that condition of skin of the hot project characteristic according to kiln, kiln, firebrick wants when the examination is eroded circumstance and moving record undertake considering) integratedly. (Only link brick is medium inside 3) kiln, ply under afore-mentioned standards and circumference is in of 1/4 annulus less than, when can considering; of mend by replacing a damaged part to be more than 1/4 annulus, answer complete ring brick to undertake changing.
Does the firebrick inside rotary kiln get what enroach on? Kiln since to calcine implement it is burner, tear open changing firebrick is constant some thing, because fireproof line system gets,its reason is all sorts of enroach on and by Tun thin or corrode is done not have. To prolong firebrick service life, studying firebrick damage matter is very important. Firebrick damages action to have the following in what often get inside kiln: (1) chemistry erodes action when normal to calcine, clinker forms temperature to be in 450 ℃ above, about 25% fluid photograph appears, fluid photograph is Gao Jian sex, conglutinate has chemical reaction with firebrick on exposed firebrick, to the action that destroy base is being eroded since firebrick. (2) suffers high temperature to erode when calcination temperature is exorbitant, can cause bricky body bate, intensity is reduced, volume is not steady, be burned gradually even frit, be done not have by corrode. (3) heats up coldly, urgently urgently as a result of,erode each reason, kiln, stop kiln, fast kiln, slow kiln, makings big, makings small, temperature low, temperature is advanced the situation prevents hard, consequently cold heat changes to often also exist inside kiln. Fireproof turn the temperature that get changes particularly frequent, because be in to calcine, when firebrick is masked by stock, temperature drops, expose outer when, be about to suffer high temperature blaze and blazing air current to heat warm up, pursue consequently 1 in difference in temperature can exceed 400 ℃ at 2 o'clock. , kind for, this kind of temperature is fluctuant at least minutely, be in one year 500 thousand times about above. Below this kind of case, if the brick is qualitative not beautiful, phenomenon of first class of blowout of very incidental firebrick, blast, service life shortens greatly. (The shake power that when the enroach on firebrick of action of 4) machine Qi often is burned by coal fines, produces, become especially coal fines is intense when combustion happening blowouts, shake force is more serious. In addition, kiln body is out of shape, central line is frame-up, gravitational effect suffers when rotate, make cylindrical shell becomes elliptic, cause pressure, fold, cut wait for stress action, cause firebrick to be squeezed to crack broken or drop phenomenon. (Because stock slides ceaselessly inside kiln and enroach on of 5) stock tatty rolls, attrition effect produces between stock and firebrick, the dirt of the be mingled with in increasing air current again is right of firebrick erode, can cause firebrick be decreased ceaselessly by serious enroach on thin. Accordingly, according to the of enroach on affection that firebrick gets inside kiln, cement kiln should have following requirement with the brick: ① is high temperature resistant, have tall fireproof degree of; ② heatproof shake, it is good that ③ of stability good; fights broken bits sex, also make fight chemistry to erode ④ of function strong; to have relatively high strenth, in order to fight the function of wear-resisting of ⑤ of enroach on; of mechanical action external form of good; ⑥ is regular, size is exact, facilitate ⑦ of the; that set build by laying bricks or stones has the property that hangs kiln skin easily.
How should the firebrick of different position choose rotary kiln according to firebrick composition different, its can be divided it is 5 kinds big, namely: The firebrick of silicon aluminium department, basic set firebrick, firebrick that contain carbon, firebrick that contain zirconium, adiabatic firebrick. Use a kind of firebrick only and any furnace are not become, the mutual collocation that needs a different firebrick is used. A. Of the firebrick inside kiln choose 1 kiln to use tall aluminous brick later at 35m, in exit cooling zone uses tall aluminous brick, the place of other uses magnesian chromic brick or pointed spar brick. 2 kiln use tall aluminous brick later at 43m, the place of other uses magnesian chromic brick or pointed spar brick. 3 kiln use tall aluminous brick later at 35m, the place of other uses magnesian chromic brick or pointed spar brick. In the exit of kiln cooling zone uses fireproof sludge. In fetal annulus around, come out to had prevented much quantity of heat, guide heat expands and cause kiln carapace to bear to kiln carapace greater mechanical stress. The firebrick of here uses tall aluminium brick and two overlay place becomes the brick that protect a layer. B. The in choosing cooling engine firebrick of firebrick of cooling machine interior, before paragraph with hind paragraph in the temperature of clinker is different, before paragraph temperature is higher, hind paragraph temperature is a few more inferior. Chooses firebrick is different also. Advanced paragraph in advocate if use tall aluminium,brick and place of overlay of heat preservation brick are become, hind paragraph in basically be brick of use heat preservation. In cooling machine, the local firebrick that with makings layer the contact grinds suffers high temperature to reach grind more terrible, firebrick character requirement is a few stricter. C. Inside warm-up machine of fireproof material the casting sex fireclay that choosing main fireproof material is heat preservation brick and coequal class. In warm-up machine, ability of fireproof material demand is qualitative light, fireproof degree, fireproof sex wants enough. Carbonado in rotary kiln in kiln process, air current carry secretly is worn powdery makings has wear and tear to tornado canister wall, the pursue a new course that runs in wind especially perhaps changes to place. The bottom of the hammer of tornado canister also has the high temperature of de-acidification to give birth to makings and canister wall contact. In kiln gas ascendant conduit reachs tertiary air there is gush coal in the canal, offer the carbonate in warm-up machine to decompose, temperature is higher also, here is fireproof material requirement is a few stricter.
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.
Get Price
WhatsApp