Insulation material is to point to the data that is used at building palisade to heat up warm current of labor facilities, impedance to deliver probably probably material answer is fit, contain insulation material already, also include keep cold data.
Insulation material on one hand satisfactory building space or the hot environment of the equipment that heat up labour, also saved power on the other hand. Consequently, some of country regards heat insulating materials is the “ after afterwards coal, oil, natural gas, nuclear energy ” of the 5th great power.
Have stronger impedance effect to warm current, principal the heat preservation article that waits with furnace of the wall body at housing, roofing or industrial conduit, kiln is adiabatic.
By adiabatic principle cent is:
① porous material. Rely on the heat insulation in the aeriform circumfuse hole with small thermal conductance. It is thermal resistance medium with air commonly, principal it is material of arrangement of fiber shape gather and poriferous construction. The thermal insulation of expanded plastics is better, it is mineral resources fiber next (like asbestine) , puffy pearlite and poriferous concrete, cellular glass.
② reflexes material. If aluminum foil can rely on to heat up reflection to cut down radiation to conduct heat, a few aluminum foil or the complex structure that have thin air layer with paper composition clip, still can increase thermal resistance cost. Heat insulating materials material of Chang Yisong lax, roll material, plank and prefab piece wait for means to be used at building roofing, outside the heat preservation with wall and good land and heat insolation. But immediate step is built (like aerocrete) or core material is made in be being put in roof and palisade structure, also can foil the heat-insulation layer on the ground.
Fiber or graininess heat insulating materials already can fill within the wall, also can spray at metope, hold adiabatic, sound absorption concurrently, decorate and fireproof and equivalent fruit. Adiabatic product breed a lot of, include heat insulation of goods of cotton of expanded plastics, mineral resources, cellular glass, puffy pearlite goods of heat preservation of cotton of spray of makings of oar of heat preservation of grain of EPS of pink of goods, glue, mineral resources, epispastic cement. Choose a key: Heat insulating materials applies type and program to choose in what building middling sees should agree.
GB/T17369-1998 " build heat insulating materials handle type and main demand " regular. Outside the coefficient of thermal conductivity that material of Lv of take an examination removes when choosing, the bibulous rate that returns material of Lv of take an examination, burn the target such as function, intensity. The functional characteristic of different heat insulating materials sees corresponding classified strategy.
Fireproof material points to fireproof degree not a kind of inorganic metalloid material under 1580 ℃ .
Fireproof spending is to show body sample is in fireproof material taper to fall without loading circumstance, revolt high temperature effect and not the centigrade that bate frit pours.
Fireproof material is used extensively at metallurgy, chemical industry, oil, machinery to make, the industrial category such as silicate, motivation, use in metallurgical industry the amount is larger, occupy the 60 ％ of 50 ％ ～ of total output.
The special data that often uses has AZS brick, corundum brick, direct couple magnesian chromic brick, carborundum brick, nitrogen changes silicon to combine carborundum brick, nitride, silicon to change the blame oxide such as content, sulfide, boride, carbide fireproof material; Chromium of oxidation calcium, oxidation, alumina, magnesian, wait for fireproof material.
The fireproof data that often uses has diatomite goods, asbestos products, heat insulation board to wait. Fireproof material has the indeterminate form that often uses filling charging, fireproof pound fireproof and dozen of makings, pouring makings, fireproof can pledge filling makings of plastic, fireproof mud, fireproof gush, fireproof and projectile makings, fireproof coating, gently fireproof and pouring makings, .
Heavy and complicated of fireproof material breed, press commonly fireproof spend concave and convex cent to be common and fireproof material (1770 ℃ of 1580 ～ ) , high-grade and fireproof material (2000 ℃ of 1770 ～ ) with fancy and fireproof material (2000 ℃ above) ; By chemical character cent is acidity and fireproof material, neuter and fireproof material and alkalescent and fireproof material. In addition, useful still the fireproof material at special situation. Acidity and fireproof material is first part with oxidation silicon,
Have silica brick and argillaceous brick commonly usedly. Silica brick is to contain oxidation silicon the silicon simple product of 93 ％ above, the material that use has silica, useless silica brick to wait, its fight acidity slag to corrode ability strong, loading bate temperature is high, repeat the bulk after to calcine not to shorten, and even swell somewhat; But its suffer basic slag easily corrode, heatproof brace up the gender is poor.
Silica brick is principal use at furnace of kiln of frit of Jiao Lu, glass, acidity steel-making to wait for hot project facilities. Argillaceous brick is first metal with saggar, contain 30 ％ ～ the alumina of 46 ％ , belong to weak acidity and fireproof data, heatproof brace up the gender is good, have the sex that fight corrode to acidity slag, apply extensive.
Neuter and fireproof material is first part with chromium of alumina, oxidation or carbon. Contain alumina the corundum goods of 95 ％ above is the high grade and fireproof data with a kind of more extensive use. The chromic brick that is first part with oxidation chromium is right of slag be able to bear or endure corrode sex is good, but heatproof brace up the gender is poorer, high temperature loading is out of shape temperature is inferior. Carbon pledges fireproof material has simple product of goods of carbolic brick, black lead and carborundum, its heat up puffy coefficient very low, thermal conductivity is tall, heat-resisting brace up the function is good, high temperature intensity is high, fight soda acid and salt corrode, do not get metal and slaggy moisture, qualitative light. Use as extensively material of high temperature lining, also use as the high-pressured boiler liner of oil, chemical industry.
Alkalescent and fireproof material is first part with calcium of magnesian, oxidation, commonly used is magnesia brick. Contain magnesian 85 ％ of 80 ％ ～ the magnesia brick of above, have very good revolt sex to basic slag and iron broken bits, fireproof degree taller than argillaceous brick and silica brick.
Principal use on equipment of smelt of the open-hearth furnace, converter that blow oxygen, electric stove, nonferrous metal and equipment of a few high temperature. The fireproof data that uses in special situation has stuff of high temperature oxide, be like lanthanum of alumina, oxidation, , oxidation calcium, zirconia, material of difficult frit compound, if carbide, nitride, boride, silicon changes content and sulfide to wait; High temperature composite material, principal coating of inorganic of cermet, high temperature and fiber enhance pottery and porcelain to wait.
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