Light simple fireproof stuff regards kiln furnace, boiler, hot project as the main component of the equipment such as container, apply on industry very extensive. The fifties, regard the firepower power plant of fuel, rubbish as incinerator with coal or oil, boiler setting is the structure of heavy-duty brick system that be built with saggar brick and red brick build by laying bricks or stones and becomes 60 time of; , convert in the electric stove body of heater that saggar brick and the; of structure of system of light qualitative brick that pledge adiabatic brick build by laying bricks or stones is built gently pledge fireproof material is built in build by laying bricks or stones gently, constant cent is fireproof layer, high temperature fireproof heat-insulation layer, medium lukewarm fireproof heat-insulation layer. To reduce boiler setting the accumulation of heat of itself is mixed through boiler setting the quantity of heat of outward be lost, when warming up in order to shorten, ask, managing heat energy, often standing by high temperature of electric stove liner ability of a thermal resistance is put near fireproof layer stronger, already fireproof the light simple fireproof stuff of heat preservation. Although this is planted,the bulk density of material has 0.4 ～ only 1.39 ／ Cm3, however ability the high temperature of 1200 ℃ above, be used as electric stove liner and material of high temperature heat-insulation layer widely. But also the bulk density as a result of it low, porosity is tall, cause mechanical strength difference of function of low, wear-resisting, fight chemistry caustic poorer also, intensity of machinery of high temperature of Lv of the take an examination when choosing whether contented requirement. The production method of light qualitative firebrick has 3 kinds: Burn-up adds content way (join wood chip normally) , bubble law and chemical law. At present commonly used light qualitative firebrick has light qualitative saggar to pledge brick, light qualitative fireproof silica brick, gently fireproof tall aluminous brick. Kiln roof ministry makes the same score condole to carry a structure on the head for light qualitative firebrick, according to temperature section setting condole carries height on the head, can satisfy ceramic already firing, narrowed again fluctuation difference in temperature, the atmosphere inside this structure facilitating kiln adjusts and temperature is controlled. Urgent cold paragraph kiln top uses fiber of pottery and porcelain fold piece makes the same score condole, delay is cold the top uses paragraph of pit fiber cotton felt and mineral wool are compound fold piece. Kiln wall part by inside tall aluminium is used to get together outside arriving light brick, the fiber blanket of adscititious and different type have thermal insulation, make total ply is decreased thin, reduce the saving heat loss due to radiation of kiln wall thereby. Kiln wall can use cotton of fiber of pottery and porcelain and thermal insulation board in great quantities, outside the insulation material such as wall paint pearlite, inside coating of high temperature of wall gush infrared ray, reduce the thickness of kiln wall, decrease conduct, radiation conduct heat, reduced the accumulation of heat of kiln wall thereby, make thermal efficiency gets rising. Current, the motherboard end the kiln of roller path kiln is armor plate almost, because armor plate has enough mechanical strength and compression strength,this is, but the value of coefficient of thermal conductivity of metallic stuff is very great, this will be helpless at heat loss due to radiation decrease. On the other hand, as raw material price climb successively litre, make of kiln furnace build cost to increase, can choose by consideration shop useless old or the big norms semi-manufactured goods of off quality or finished product brick, perhaps choose super- strong waterproof and fireproof board the cheap material of and so on replaces board, this should be feasible. Because, the coefficient of thermal conductivity that is this kind of brick and plank firstly far the coefficient of thermal conductivity under metallic stuff, conduce to reduce hot be lost; It is this kind of brick and plank secondly the mechanical strength with still be had particular and heat-resisting intensity. When build by laying bricks or stones is built, ash seams strict control to be in 2mm less than; Burner brick all around (part seeing fire) with light qualitative Molaishi bricky build by laying bricks or stones is built, and should approach close with fiber blanket; Of place of tall aluminous brick expand seam introduce carpet of tall aluminium siliceous aluminous fiber, other place expands seam use common model blanket of siliceous aluminous fiber. Thin model need of kiln of energy-saving roller path changes the brick gently character, light-duty change, energy-saving change, built fireproof material to raise taller requirement to kiln body build by laying bricks or stones undoubtedly. Thin model kiln of bricky roller path is fireproof the development trend henceforth has stuff as follows a few respects: 1, light qualitative firebrick is sided with reduce bulk density, raise heat-resisting shake sex, increase mechanical strength, reduce the heavy change that burn a line, improvement heat proof quality, lengthen service life and more economic way develops. Use at prep above especially the performance improvement difficulty of the light qualitative firebrick of the working face of furnace of high temperature kiln of 1500 ℃ is a few greater. 2, fireproof fiber will be used more extensively henceforth, furnace of kiln of completely fireproof fiber will be more. The wear that fireproof fiber uses and be able to bear or endure chemical aggressivity is due further improve, also be in furnace of high temperature kiln (prep above 1300 ℃ ) go up difficulty is greater. Not be to do not have high temperature resistant fireproof fiber at present, however the price is very high, performance is very not good still also. 3, fireproof material is like other and significant position roller path kiln is firing carry roller and firebox of high speed burner and spray head, remain to be improved further. There are a lot of contradictions to remain to solve while fireproof material develops, if change the contradiction that reachs intensity with service life gently character, light-duty the contradiction that changes as mechanical as high temperature intensity. Solve contradictorily ceaselessly as these, thin model kiln of bricky roller path will develop towards higher level. 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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