Does the firebrick inside rotary kiln kiln change standard rotary kiln does the firebrick inside kiln change what is the 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. The property of the skin that hang kiln of firebrick of line of rotary kiln kiln is so-called kiln skin is to point to cement raw material is in firing take and transfer the firebrick of the belt apparently, pass adhere and chemical combination and form a stock layer that has strength. Firing inside kiln belt, the firing temperature that what expects is 1300 ℃ ～ 1450 ℃ , and blaze temperature is as high as 1800 ℃ ～ 2000 ℃ , to all around give out much radiant energy. When the fluid photograph that appears to seldom be counted when firebrick surface (common weighs out sweat) , raw material can issue cohere to be in in high temperature condition firebrick apparently, form kiln skin to get initiative layer. Give birth to the certain element in makings, still meet firebrick surface is microcosmic permeate certain deepness, as the roll of kiln, firebrick is on the foundation of skin of this one initiative kiln, gradually one layer upon layer form thicker, relatively stable kiln skin. It can be fought effectively grind, heat of sluggish of adiabatic, block is eroded and chemistry is eroded. Because this firebrick and cement give birth to the ability that expects proper response forms kiln skin, call the skin that hang kiln ability. This is stitch firing to rotary kiln take and transfer the term that carries fireproof material to put forward and concept. The factor that affects ability of the skin that hang kiln has: 1, the CaO that there are a large number of dissociates equably inside brick of chemical composition white cloud, generate C3S extremely easily with the C2S reaction in clinker, so dolomite brick hangs kiln skin extremely easily, and brick and kiln skin felt are close together, solid. Magnesian chromic brick is initiative the skin that hang kiln is easier, dan Ge produces reaction extremely easily with alkali metal and sulfur, form volatile K2CrO4 and K2(CrS)O4, the partial element that makes clinker permeates the hot facing of magnesian chromic brick, make its compact and fragile change, this transfers because the layer heats up coefficient of expansion and magnesian chromic brick to differ bigger, change suddenly in temperature when, tear off very easily along with kiln skin flake. Join in firebrick a few (2%) zirconium oxide, can generate the CaZrO3 of high melting point through CaO+ZrO2, enhance the binding energy power of firebrick and raw material, increase the stability of kiln skin. At the same time ZrO2 still can increase the thermal shock stability of firebrick and high temperature strength greatly. Restricted its application because of price element at present. 2, the chemical adaptability of the microstructure cement raw material of firebrick and fuel and fireproof material is in alkaline environment, magnesian chromic brick second. The constituent of magnalium pointed spar in pointed spar brick also can be eroded by alkali metal, chromic brick of magnesium of excel of sex of its alkali resistance, but second at dolomite brick. Much practice experience proves, when clinker medium alkaline sulfur is compared (K2O+Na2O-Cl-)/SO3 is more than 1 when, firing the life of the line that bring pit with dolomite beautiful, take second place of pointed spar brick, poor; of magnesian chromic brick is become sulfur is alkaline than be less than 1 when, firing life of the line that bring pit with beautiful of magnesian zirconium brick, it is pointed spar brick next, just be dolomite brick next. How does build by laying bricks or stones build rotary kiln firebrick? Rotary kiln (cement kiln) the on any account that movement leads and firebrick build by laying bricks or stones build quality to have very big concern, build a technology strictly to ask according to the build by laying bricks or stones of firebrick elaborate construction, specific requirement is as follows: 1, the kiln skin that felt should get on bricky line before construction clears clean, especially buy point wants square Mu Fang as far as possible level off. 2, be in bricky line with guide screw and Fang Mu level and upend direction top are close; After needing changing part certainly, will withhold partial top to tighten with guide screw and Fang Mu. 3, when eliminate groove old brick, need notices to protect bricky line, prevent to withhold bricky line to slide. After eliminate, solder to prevent bricky line to slide on cylindrical shell with small armor plate. 4, comprehensive and careful examination should have to rotary kiln housing before firebrick build by laying bricks or stones is built, will sweep clean inside kiln. 5, when build by laying bricks or stones is built, why to no matter adopt,plant build by laying bricks or stones builds kind, want to undertake according to datum line build by laying bricks or stones is built strictly, forbidden do not put line build by laying bricks or stones to build. The work that put a line should have done before firebrick build by laying bricks or stones builds: The datum line of kiln wants to put a line along round circumference 1.5m, each line wants the axes parallel with kiln; Annulus to datum line every 10m puts, annulus all answer to the line mutual parallel and perpendicular the axes at kiln. 6, the main demand of the bricklaying inside kiln is: Bricky line is clingy kiln carapace, brick and brick should rely on to father, the brick is seamed should straight, hand in a circle to want to allow, lock brick wants prison, pretty good, no less than hanging down, do not take off empty. Anyhow, in wanting to ensure firebrick and kiln system move in cellar, have reliable homocentric degree, the stress of bricky line should distributing to go up in whole kiln line and every brick equably. 7, the methodological cent of bricklaying is annulus build by laying bricks or stones and crisscross build by laying bricks or stones two kinds big, new cave dwelling and cylindrical shell are neat and in good condition and be out of shape use method of annulus build by laying bricks or stones not badly commonly; Cylindrical shell is out of shape more serious and the traditional kiln with the appearance poorer quality that uses a brick, in tall aluminium brick and argillaceous brick place can use method of crisscross build by laying bricks or stones. 8, when annulus build by laying bricks or stones, annulus meets deviation allows 2mm every meters, end length of a construction allows big 8mm. When crisscross build by laying bricks or stones, even if meet deviation allows 2mm every meters, but big allowance of complete ring length is 10mm. 9, every hind a brick (the circuit after dividing) from bricky line a side (direction of circumgyrate cellar axes) push, finish build by laying bricks or stones whole rounds to build, notice to adjust a brick model as far as possible not use consecutively. The juncture armor plate of dry build by laying bricks or stones is 1-1.2mm commonly, the width of armor plate should compare left and right sides of width small 10mm, armor plate must not exceed bricky limit, do not get sounding of occurrence armor plate and the appearance that take the bridge. 10, firebrick build by laying bricks or stones is built after finishing, should do to all line brick comprehensive ground clears and originally closely, after close firm completes, should not be turn again kiln, should seasonable ignition, according to carbonado kiln curve undertakes roast. 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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