Light qualitative heat preservation is fireproof material is to point to density the small, fireproof product that has heat preservation heat insulation, if heat preservation brick, heat preservation is pouring makings and heat preservation fiber. Light qualitative heat preservation is fireproof material is by use temperature cent: Microtherm heat preservation is fireproof material, use temperature under 900 ℃ , be like brick of diatomite heat preservation, expand silica goods, silicon calcareous plate, expand pearlite goods; In lukewarm heat preservation is fireproof material, use temperature 1200 ℃ of 900 ～ , if stick firebrick of earthy heat preservation, siliceous aluminous qualitative fireproof fiber; High temperature heat preservation is fireproof material, use temperature is more than 1200 ℃ , be like firebrick of tall aluminous qualitative heat preservation, firebrick of alumina heat preservation, firebrick of silicon qualitative heat preservation, alumina is hollow ball brick, zirconia is hollow ball brick, tall aluminous fireproof fiber, much crystalloid is fireproof fiber (fiber of much brilliant alumina, fiber of much brilliant zirconia, qualitative fiber of much brilliant Mo Laishi) wait.
Fireproof material and long water mouth use heat preservation fireproof material and slip water mouth use fireproof material to wait to differ somewhat, refractory products basically uses manufacturing heat preservation the technique that can form poriferous structure, if law of light qualitative raw material, burn oneself out adds content law, bubble law, chemical way,wait. Noncrystalline is fireproof fiber, if siliceous aluminium is qualitative fireproof fiber, tall aluminous fireproof fiber, use melt law to produce normally. Much crystalloid is fireproof fiber, wait like Mo Laishi fiber, alumina fiber, with colloid law production. Heat preservation is fireproof the main feature of material is porosity tall, be in commonly 45% above; Bulk density is low, do not exceed 1.5g/cm3 commonly; Thermal conductance is low, majority is less than 1.0W/ (M · K) . Basically use as the heat preservation heat preservation of industrial furnace kiln, it can reduce the heat loss due to radiation of furnace kiln already, can reduce the harbour quantity of heat of furnace kiln again, achieve the energy-saving result of beautiful, can reduce the weight of hot project facilities. Fireproof material and general firebrick compare heat preservation, its fight broken bits aggressivity, mechanical intensity and wearability poorer. Accordingly, unfavorable be used at furnace kiln bearing structure and direct contact the place such as metal of slaggy, charging, melt.
Cotton of fireproof material glass belongs to vitreous cotton heat preservation heat preservation is fireproof a kind of material. Its are vitreous melt, be blown with gush or centrifugal process is made. Place of basis of vitreous cotton goods differs with bond can divide for microtherm, medium lukewarm, high temperature 3 sort. It is the goods of bond to using resin, use temperature is unfavorable more than 200 ℃ , and high use temperature exceeds the product that inorganic bond combines 400 ℃ . Vitreous cotton goods uses as extensively heat preservation keeps cold data. The heat preservation that in heat preservation respect it can regard vapour as kiln of boiler of boiler of tower of canal, evaporator, rectify, reaction, high pressure, annealing furnace, glass, flue is fireproof material. Protecting cold respect to be able to be used on the equipment such as canister of microtherm conduit, freezer compartment, refrigerant keep in storage.
Kiln furnace uses light qualitative heat preservation the main body function of the principle kiln furnace of fireproof material basically is decided by the technical economic performance of fireproof material, the investment cost that affecting kiln furnace directly, character of service, thermal efficiency, the sources of energy that run uses up charge to wait. Choose the general principle of fireproof insulation material: 1, the function of kiln furnace and hot project characteristic. The kiln furnace that works like clearance sex should choose the material with small thermal capacity. 2, intensity of system of the safe use temperature of material, heat conduction, high temperature, chemical stability. 3, use life. 4, investment expenses upholds charge with what move. Generally speaking, the fireproof material that pledges again emphasizes particularly on quite some specifications index, wait like high temperature stability, chemical stability; Be able to bear or endure to pledge insulation material pays attention to investment and the integrated technology economic norms that move more gently. When choosing light qualitative insulation material, it is the coefficient of thermal conductivity that uses insulation material commonly (λ ) the charge with insulation material of every unit volume (Ρ ) will decide, "λ Ρ " product value heals small had healed. Value of coefficient of thermal conductivity is little, the adiabatic result that shows insulation material is good, the fare of the sources of energy when moving is low. The fare of investment of charge low specification of insulation material of every unit volume is low, have good investment economy effect. Can use coordinate diagram method constructive alternative, the abscissa is working temperature, ordinate is (λ Ρ ) good indigestion, the intercept of safe use temperature that uses data the curve of each material, choose the stuff with technical good economic performance.
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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