What does the hollow ball brick in brick of light qualitative heat preservation have?

In fireproof material, weight of brick of light qualitative heat preservation is light, sort is richer also, introduce the hollow ball brick in brick of light qualitative heat preservation for everybody today: Alumina is hollow ball brick and zirconia are hollow ball brick, the price of these two kinds of products is not cheap, former 10 thousand a ton or so, latter is as high as ten tons.

Alumina is hollow ball brick

Apparent pore of hollow ball brick is led low, coefficient of thermal conductivity is small, heatproof shake performance is good, intensity of high temperature structure is high, but immediate step is built in the liner of furnace of high temperature kiln that contacts with blaze, and cover of pipe of heat of production high temperature, tray, protection. Commonly used hollow ball brick has alumina hollow ball brick and zirconia are hollow ball brick.
　　
1, alumina is hollow ball brick
Alumina is hollow ball brick is the adiabatic and refractory products that with alumina hollow ball is main raw material. The typical technology index of hollow ball brick is alumina: Al2O3 content is less than 98% , siO2 content is more than 0.5% , fe2O3 content is more than 0.2% , bulk density 1.3~1.4g/cm3, apparent pore leads 60%-80% , compression intensity is not less than 9.8MPa, loading (0.2MPa) bate temperature is not less than 1700 ℃ , k) of · of thermal conductance 0.7~0.8W/(m.

Hollow ball brick uses alumina hollow ball is alumina main raw material, high-powered small pink is additive, organic material is done temporarily bond, become in fire of high temperature of the 1750 ℃ inside shuttle type kiln. Many closed pore is contained inside goods, have qualitative light performance of high temperature resistant, heat preservation is good, burn systole again small, heatproof shake performance is good wait for a characteristic, mix to aggressivity gas slaggy also have stronger counteractive capacity. Products can increase kiln furnace thermal efficiency to use greatly, shorten production is periodic, reduce kiln body weight, implementation is energy-saving fall bad news.
　　
Hollow ball brick and photograph of common and adiabatic refractory products compare alumina, its characteristic is many closed pore is contained inside goods, accordingly, it has high strenth and stable and stomatic structure, low density and low hot conductivity, basically use as liner of furnace of kiln of industry of 1800 ℃ the following high temperature, for example the; of brick of liner of furnace of high temperature kiln of industry of fireproof material, electron, ceramics Zuo is tepid the heat preservation thermal insulation of labor facilities, for example the adiabatic brick of electric induction furnace of reaction furnace of industry of the furnace of petro-chemical industry aerification, furnace that make energy of life, coal, metallurgical industry.
　　
2, zirconia is hollow ball brick
Zirconia is hollow ball brick is the adiabatic and fireproof product that with zirconia hollow ball makes for main raw material, of this kind of brick advocate brilliant photograph is cubic zirconia (the 70%~80%) that takes mineral composition about, its model function is: Fireproof degree be more than 2400 ℃ , apparent pore leads 55%~60% , bulk density 2.5? 3.0g/cm3, compression intensity is not less than 4.9MPa, k) of · of thermal conductance 0.23~0.35W/(m.

Zirconia (the opposite element quality of ZrO2) 123.2, true density 5.68g/cm3, melting point is 2670 ℃ , mohs hardness is 6.5 degrees, the coefficient of average linear expansion of 20~1000 ℃ is 10×10-6/ ℃ : , 1000 ℃ thermal conductance is 2.30W/(m· K) . The compression intensity of zirconia ceramic can amount to 2100MPa.

Zirconia goods is close to acidity and fireproof material, have to acidity or neuter slag fight aggressivity goodly. Use below oxidation atmosphere condition very stable.

Below different temperature, zirconia exists with monocline brilliant, all directions brilliant and cubic brilliant. Monocline brilliant is stable at 1170 ℃ the following, all directions brilliant is stable between 1170~2370 ℃ , cubic brilliant is stable at 2370 ~2680 ℃ (melting point) between.

Zirconia is hollow the ball is the adiabatic and fireproof product with good performance, safe use temperature is as high as 2200 ℃ , hollow ball brick has zirconia relatively the high temperature intensity of Zuo and stable stomatic structure, can be in thereby 2200 ℃ Zuo is lukewarm next safety are used. Zirconia is hollow ball brick density is low with hot conductivity low, can reduce loss of quantity of heat already, can reduce harbour quantity of heat again. The material of high temperature liner that because this is in the hot project facilities such as metallurgy, oil, chemical industry, electron,regards direct contact as blaze can be reduced specific power consumption and reduce high temperature furnace self-prossessed, it is the brick of high quality light qualitative heat preservation of tungsten industry, use result is favorable.

About what pledging the hollow ball brick in heat preservation brick has gently? Introduce here, hope to be helped somewhat to everybody, if everybody has other doubt, the welcome seeks advice from flourish Cheng Naicai, choose flourish Cheng Naicai, achieve happiness of high temperature industry to did not come in all hand in hand with you!