Rotary kiln has what demand, how to choose fireproof material?

Rotary kiln is a floorboard, according to to calcine material cent is cement, lime, zinc oxide, rubbish to burn rotary kiln. Refer to please below the relevant content that arrange.
If rotary kiln firebrick wants to use long firebrick, recommend the firebrick that uses long L to be 250mm actively. The non-working surface that still uses in certain place (cold face) dimension A should get admissive for the firebrick of 90mm. Firebrick permissible variation in dimension by agreement of both sides of supply and demand. ISO9205:8 of active international standard8(E) regulation, rotary kiln firebrick heats up identification marking to be as follows: 1. With nick system mark. The nick of every kinds of firebrick is different, should engrave in firebrick, identify easily, and should have arc all round, and nick dimension did not set strictly. 2. The mark position of firebrick. Every can be installed momently go up in line of center of firebrick hot side, also can install the place that arranging 66mm from firebrick center line. 3. The color patch of firebrick. Color patch is labelled by different color the system is comprised. These color marks should add before firebrick is carried go up in the hot side of firebrick, the brightness that color indicates and color should enough identifies all sorts of firebrick clearly.
How to choose rotary kiln the fireproof material of different position? According to the different composition of firebrick, can divide the firebrick of the aluminium that it is silicon, alkalescent firebrick, firebrick that contain carbon, zirconium firebrick, adiabatic firebrick 5 kinds. Any furnace are become with a kind of firebrick build by laying bricks or stones not just, need the collocation of different firebrick. 1. Tall aluminous brick is used after 35m of the kiln inside kiln, exit cooling zone uses tall aluminous brick, other place uses magnesian chromic brick or pointed spar brick. 43m hind uses tall aluminous brick, other place uses magnesian chromic brick or pointed spar brick. 35m hind uses tall aluminous brick, other place uses magnesian chromic brick or pointed spar brick. Fireproof mud is used at #3 kiln to export cooling zone. Around fetal annulus, kiln case stands greater mechanical stress, deliver in order to prevent overmuch quantity of heat, bring about kiln carapace heat to expand. The firebrick here is comprised with the brick that protect a layer by tall aluminous brick. 2. The firebrick in cooling machine condenser, before paragraph after mixing paragraph clinker temperature is different, duan Wen is spent before taller, duan Wen is spent after inferior. What choose firebrick to also differ. Before paragraph basically use tall aluminous brick and heat preservation brick, hind paragraph basically use heat preservation brick. In condenser, the effect that suffers high temperature and attrition with the firebrick that material layer is contacted and chafes is bigger, the quality requirement of firebrick is relatively strict. 3. Main and fireproof material is warm-up machine heat preservation brick and fireclay of sex of the casting that be the same as class. In intake air heater, fireproof material asks material is light, fireproof, fireproof. Rotary kiln carbonadoes in kiln process, powder of air current carry secretly wears away tornado canister wall, the canal turns or change in wind especially to place. Bottom of tornado canister hammer still has the high temperature raw material of de-acidification and canister wall contact. Kiln enrages ascendant conduit and tertiary air canal to all have gush coal, of the carbonate in be being used at intake air heater decompose, temperature is higher, here is strict to the requirement of fireproof material.
Does the build by laying bricks or stones of build by laying bricks or stones of fireproof material line build rotary kiln what is the requirement? Because rotary kiln is kiln of trends of a kind of high temperature, build a demand to the build by laying bricks or stones of fireproof material taller. Before build by laying bricks or stones builds line build by laying bricks or stones, should the protruding leave of the welding line inside microscope kiln canister spends what whether accord with kiln canister to solder technical requirement, provide the welding line of limit more than with burnish of portable emery wheel. Before build by laying bricks or stones is built, rotary kiln should be cleaned thoroughly, keep clean and dry, without ash, without rust, without oily, anhydrous, corrosion of metals must be brushed with steel wire cleared. Assure the good union of firebrick and kiln canister. Build by laying bricks or stones builds a course in, firebrick should stand by kiln canister, should stand by between firebrick. The brick is seamed straight, hand in a circle to allow, lock up bricky prison, the place is good, ministry prolapse is taken off empty. Below the premise that air cylinder stands by by the brick, ensure rotational side can be stood by each other, namely so called firebrick falls quadrilateral the ground (firebrick is contacted with kiln air cylinder quadrilateral) , between firebrick, the surface should be contacted completely. When build by laying bricks or stones is built, ensure all bricks seam extension line assemble to be on kiln canister axes. Do not allow quadrilateral not touchdown or firebrick juncture do not get together in tilt, photograph adjacent firebrick does not permit 100% contacts, firebrick size does not stand by dehisce. This kind quadrilateral not touchdown and dehisce phenomenon, appear easily in moving process firebrick becomes loose, evolve to be taken off for prolapse gradually empty, till smoke core,take off a brick. To assure the close together sex of firebrick and kiln canister, unoccupied place close together sex also can no keeping anything from each other between firebrick, the proposal uses ISO and VDZ standard type brick. Make the arc curvature of firebrick accords with the curvature of kiln canister as far as possible, raise build by laying bricks or stones to build mass. Because firebrick has whole annulus look tiny to air cylinder rotating possibility, fore-and-aft brick allows to seam a mistake when build by laying bricks or stones builds firebrick, but do not allow annulus to seam a mistake to the brick absolutely, with avoiding annulus Xiang Xuan to turn the trend plays the bulgy part that cuts off firebrick. To assure to be seamed to the fault without annulus, in what assure a brick over all dimension accords with a country or the premise of occupation standard falls, need chooses firebrick meticulously, proper fill is fireproof mud undertakes adjustment.
Cement rotary kiln innovates through old technique, the advanced rotary kiln on the market obtained a breakthrough in respect of equipment of system of rotary kiln to calcine, the choice of fireproof material also accumulated rich experience. Cement kiln system chooses the principle of fireproof material to be as follows: ① is mixed according to production methods kiln choose fireproof material. The norms of ② basis kiln chooses fireproof material. ③ basis place chooses fireproof material with the property of raw material and fuel. The thermic load inside ④ basis kiln chooses fireproof material. Internal stress of ⑤ basis kiln distributings and thermal stress distributings choose fireproof material. (The fireproof data that uses in kiln system is disclosed outside 2) kiln. Mouth of discharge of ① rotary kiln reachs cooling zone. Requirement: As a result of the joint action of 2 high temperature grog, air and high temperature blaze, mechanical wear and chemistry are eroded very strong. Accordingly, the requirement has good wearability, be able to bear or endure broken bits sex and heat-resisting shake sex. Choose: ? Cong achieves blown away by wind of take along sth to sb of  word Cui to suffer from steep brick of tall aluminium of shake of 65%~75%) of phosphorous?A1203 content, heat-resisting, pointed spar brick, chromic magnesia brick, phosphate brick. ; Tall aluminous brick, fireproof concrete (corundum is aggregate) with carborundum brick commonly used at discharge mouth. ② rotary kiln is firing belt. Requirement: The fireproof liner that rotary kiln fire takes basically suffers high temperature concussion and chemistry to erode (alkalescent erode) , because this need makes,appliance has enough and fireproof sex and high temperature to hang the fireproof material of kiln skin easily. ③ rotary kiln transfers belt (exothermic reaction takes) . Requirement: Kiln skin is hanged, temperature change is frequent, air cylinder temperature is high, chemistry is eroded serious, because this requirement can bear,high temperature is pounded. Fireproof material has higher high temperature to fight lose intensity and lesser stretch model amount, choose: Corundum (A1203 content is 50%~% ) the tall aluminous brick that makes with bauxite. Direct union chromic magnesia brick, common chromic magnesia brick and pointed spar brick. ④ intake air heater and decompose furnace. Requirement: Of fireproof material high temperature resistant choose with heat proof quality: The tornado canister with afore-mentioned inferior temperature can be used directly pouring makings (fireproof concrete) pouring. The following intake air heater. Decompose furnace and join canal to be able to use brick of clay of alkali resistance wear-resisting, add adiabatic and compound layer. Coping part uses firebrick condole top, carry line mineral wool on the back, also can use pouring makings is pouring. Pouring makings is commonly used at every bend. Kiln end ascendant flue can use brick of half silicon qualitative clay, the structure is compact, prevent alkaline erode. System of engine of refrigeration of ⑤ cement grog. The fireproof liner that grate condenser uses includes to be irrigated firebrick, gently character build brick, adiabatic brick, thermal insulation board to wait. Common chromic magnesia brick can be used at next high temperature area, makings larynx areas and high temperature area. Brick of tall purity tall aluminium. Argillaceous brick can be used at in area of gentle low temperature.
The knot after before rotary kiln writtens guarantee circle cent is, the processing that zinc oxide rotary kiln writtens guarantee ball knot is encircled writtens guarantee the circle is mixed is encircled, be in commonly kiln fast form below slower circumstance. The knot before kiln encircles processing. Current, should written guarantee when the group is not high, not big to influence of to calcine operation, but the ply that can add combustion material layer, extend the retention period that combustion strip expects; Written guarantee at present when rotary kiln when the group is higher, the meeting is right kiln condition or hot industry system produce bigger effect, cause pit inside ventilated and undesirable, kiln head is being pressed, blaze cannot extend, blaze figure is bad; Big grog boils not easily, destroy kiln skin easily. In handling a process, want to pull gush coal tube only, rotary kiln makes high temperature encircles the position in the knot centrally, it is OK that the knot is encircled before gradually burn-up. (The knot after 2) kiln encircles processing. Cement group basically is in after firing take and transfer form between the belt, affect the ventilated, crop of whole system and quality. Cold hot alternant law is used at processing normally. Among them: When long and cement group is not high, want to pull gush coal tube only, adjust blaze figure, rotary kiln makes blaze thick and short, can reduce a knot to encircle the temperature of place, make its gradually cave in (this kind of method calls the cold) that burn a law; If the group is already senior tall, what affect zinc oxide rotary kiln badly is ventilated, should decrease above all into makings quantity (it is the 80%) that takes makings amount normally about, use cold hot alternant law to burn 2h left and right sides, till rotary kiln encircles burn down. Latter often can be at the back of circle accumulative and many raw material pink. When circle collapses, it can emerge quickly to firing belt. Right now, answer to pull gush coal tube in time, decelerate kiln fast (call normally beforehand accommodation train) , shut small exhaust appropriately, make firepower intensity is centered in firing on the belt, rotary kiln avoids to run raw material as far as possible or burn for long raw material.
Does rotary kiln firebrick change what is the standard? (1)80001 10 thousand tons / rotary kiln of D product line is firing the skin that bring pit does not stabilize area. Transfer take firebrick ply to be less than 120mm, kiln skin stabilizes area firebrick ply to be less than 100mm, window end is fought flake bricky ply is less than 80mm, can consider to change (surface of condition of skin of the hot project characteristic that checks Shi Yinggen to occupy pit, kiln, firebrick is eroded circumstance and moving record considers) integratedly. (2)2000 year rotary kiln of 5000t/d product line is firing the skin that bring pit does not stabilize area. Transfer take firebrick ply to be less than 110mm, kiln skin stabilizes area firebrick ply to be less than 100mm, kiln end is fought flake bricky ply is less than 80mm, can consider to change (surface of condition of skin of the hot project characteristic that checks Shi Yinggen to occupy pit, kiln, firebrick erodes circumstance and moving record) . (Ply of brick of annulus of the sheet inside 3) kiln under afore-mentioned standards and circumference is in of 1/4 annulus less than, can consider mend by replacing a damaged part; When be more than 1/4 annulus, should change complete ring brick.