Corundum not comes stone brick is with high pure corundum and high grade Molaishi are raw material, classics high pressure shapes. The heat conduction rate of fireproof product is one of hot physics function with fireproof the mainest material, the coefficient of thermal conductivity of Mo Laishi brick is corundum 2.0, this product is the good stuff that build by laying bricks or stones builds furnace of high temperature, superhigh temperature kiln, apply on kiln of high temperature channel especially, can show strength of high temperature structure more good, thermal shock stabilizes stability of tall, bulk the performance characteristics with good performance, the use time that extends kiln furnace thereby pledges Mo Laishi brick uses corundum gently Mo Laishi of frit of Bai Gangyu, report, burn break an agent to mix by certain proportion, shape, high temperature fire and into. The coefficient of thermal conductivity of corundum Mo Laishi is the prominent dominant position of corundum Mo Laishi.
Corundum not comes the composition of stone brick
Corundum not comes stone brick is it is main raw material with corundum, Molaishi, exceed fine pink and additive through adding silicon of right amount alumina, oxidation, high temperature fire finishs in oxidation atmosphere and become. Its AL2O3 content is 72%~90% .
Corundum not comes the manufacturing technology of stone brick
Body of adobe of corundum Mo Laishi uses 300t attrition compressor shape, base substrate density is 2.7g/cm3. Base substrate undertakes inside channel desiccator dry. ℃ of entrance temperature 40~50, highest and dry temperature 130 ℃ , dry time 48h, base substrate moisture is more than 1.5% . Goods is firing inside channel kiln, firing temperature is 1550 ℃ , 10h of heat preservation time.
Corundum not comes of stone brick shape method
(1) the refractory products with complex, larger size uses figure air hammer is pounded hit or vibration shapes.
(2) common goods or standard norms dimension can use high pressure of half dry method to shape.
(3) different pure or special goods needs to design a pattern, use etc static pressure shape.
Corundum not comes the physics of stone brick is characteristic
Corundum not comes the high temperature of stone brick advocate brilliant photograph is for corundum and Molaishi. The crystal of corundum is short columnar, tubbish, in be able to bear or endure do not alternate each other in material composition, not crisscross. Embed between corundum crystal have Molaishi stagger is columnar crystal, prevent the slippage of corundum crystal effectively, acquire stable structure. Because crystal structure is stabler, more the good performance that is helpful for developing Molaishi or Molaishi and corundum, be like melting point: Mo Laishi 1870 ℃ , corundum 2050 ℃ , both in all frit temperature is higher, for 1840 ℃ , the improvement that is helpful for material high temperature capability and rise.
Corundum not comes the advantage of stone brick is characteristic
(1) high temperature resistant, temperature of heavy bate of fireproof temperature Gao Hehe is high.
(2) be able to bear or endure chemistry is eroded, to acidity solution or slaggy have stronger resistance.
(3) fight oxidation. Wait for aeriform happening chemistry not easily to react at O2, H2, CO.
(4) thermal stability is good, high temperature volume is steady, not easy and outspread or contractive.
(5) heatproof shake performance is good, be able to bear or endure urgent cold urgent heat flakes not easily.
(6) intensity of normal temperature compression is high, be being carried or when discharging wear away not easily.
The manage of Mo Laishi brick changes corundum index
Corundum not comes the utility of stone brick
Mo Laishi brick can contact corundum directly blaze, fight flake, high temperature resistant, can regard high temperature industry as the adiabatic line of furnace already, also can regard the job of furnace of kiln of other industry high temperature as the layer, basically apply at petrifaction industry, large and medium-sized furnace of synthetic ammonia aerification and stove of magnetic material gas use data, material of establishment of form a complete set of furnace of kiln of high temperature industry.
Characteristic: Have it is high temperature resistant, anti-corrosive, good to fight oxidation, thermal stability, line change ratio is small wait for a characteristic,
Utility: Apply extensively at liner of all sorts of furnace of high temperature cellar and adiabatic heat-insulation layer. Basically apply at petrifaction industry, large and medium-sized furnace of synthetic ammonia aerification and stove of magnetic material gas use data, brick of the lining of furnace of kiln of industry of material of establishment of form a complete set of furnace of kiln of high temperature industry, high temperature, kiln car, ejector plate, the chamber of a stove or furnace, muffle line.
Mo Laishi gets together light brick characteristic:
Low heat conduction leads: Have very good adiabatic effect, can make boiler setting ply attenuates.
Low thermal capacitance: Because its are light,lead with low heat conduction character, light qualitative Molaishi the heat energy with very few save up of bricky series product, energy-saving in operating kiln by fits effect is apparent.
Mo Laishi gets together the utility of light brick:
Can use the liner of kiln furnace working face that makes direct contact blaze, can improve the energy-saving result of kiln furnace significantly;
Application is furnace of Yu Rong refine, firing device of kiln, flue, fine, add hot device, second birth device, gas happening furnace of furnace and conduit, soaking, annealing furnace, reative cell and other are similar industry heats up labor facilities.
Mo Laishi gets together coefficient of thermal conductivity can amount to light brick 0.25, manage changes index to be as follows related its:
|
Classify temperature (℃ ) |
1400 |
1550 |
1600 |
|
Al2O3 (% ) ≥ |
50 ～ 70 |
65 ～ 70 |
79 |
|
Fe2O3 (% ) ≤ |
0.5 |
0.5 |
0.5 |
|
Bulk density (G/cm3) |
0.8 |
1 |
1.2 |
|
Normal temperature compressive strength (Mp) |
3 |
5 |
7 |
| Coefficient of thermal conductivity (350 ℃ ) W/(mk) |
0.25 |
0.33 |
0.42 |
|
Loading bate temperature (℃ ) (0.2 Mp, 0.6% ) |
1400 |
1500 |
1600 |
|
The heavy change that burn a line is led % (1400 ℃ ×3h) |
≤0.9 |
≤0.7 |
≤0.5 |
|
Use temperature for a long time (℃ ) |
1200 ～ 1500 |
1200 ～ 1550 |
1500-1700 |
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