Product Overview Bond corundum brick is a kind of corundum refractory with Al2O3 content above 95%and the main crystal phase being concentrated -Al2O3, which is made of sintered alumina (sintered corundum) as raw material by high temperature firing. Bond corundum brick has the characteristics of high refractoriness, hardness and strength, anti-oxidation, anti-corrosion, electrical insulation, good air tightness, good wear resistance, strong slag resistance, small expansion coefficient, low creep and anti-spalling. the thermal shock stability of bond corundum brick is related to its structure. It has good corrosion resistance, but poor thermal shock stability.The volume density is greater than 3.60g/cm3, and the porosity is low. The raw material of bond corundum brick is made of the calcined high purity industrial alumina (sometimes adding a small amount of MgO as additive to improve its crystal structure). The calcined high purity industrial alumina is ground into fines and be pressed to blank body, afterwords the blank body will be fired at high temperature of above 1850鈩? High temperature calcination will reduces the porosity and increases the grain size by 25~40 times in the blank body. The good sintered corundum crystal has a dense plate structure. The sintered corundum with a porosity less than 3% and a volume density greater than 3.60g/cm3 will be crushed to the required particle size for making the brick. The production process of bond corundum brick is as follow: To crush the bond corundum to 3mm particles and some super fine powder less than 0.074mm, some of them are mixed with a small amount of clay and other binders, and be formed into green brick by high pressure friction brick press or oil press, and then put the dried green brick into the shuttle kiln to be fired. Generally, the firing temperature of higher purity corundum brick is 1750-1800鈩? Bond corundum brick is a high grade refractory material, suitable for high temperature kiln under various atmosphere conditions. Bond corundum brick is mainly used in blast furnace and off-furnace refining furnace in metallurgical industry, as well as in ironmaking blast furnace and hot blast furnace, off-furnace refining furnace, sliding water device, glass furnace and petrochemical industry furnace. The external dimensions, physical and chemical indexes and service life of Bond corundum brick have met the demand of high temperature furnace. Characters High refractoriness, hardness and strength, good resistance to oxidation and corrosion, good electrical insulation, good air tightness, good wear resistance, strong slag resistance, small expansion coefficient and low creep Technical specification ItemGYZ-99GYZ-95 Al2O3 /%鈮?/p>9995 SiO2 /%鈮?/p>0.15鈥?/p> Fe2O3 /%鈮?/p>0.10.3 Bulk density/锛坓/cm3锛?/p>鈮?/p>3.203.10 Porosity /%鈮?/p>1920 Cold crushing strength /MPa鈮?/p>85100 Refractoriness under loadingT0.6/鈩?/p>鈮?/p>17001700 Permanent linear change after heating锛?600鈩兠?h锛?% -0.2~+0.2-0.3~+0.3 Inspection standard: (in mm) ItemData Size toleranceSize 鈮?00卤1.0 Size 101~250卤1.5 Size 锛?50卤2.0 WrapSize 鈮?50鈮?.0 Size 251~350鈮?.5 Size 锛?50鈮?.0 Melting hole diameterHot face鈮? Cold face鈮? Crack lengthWidth 鈮?.1Allowed Width 0.11~0.25鈮?0 Width 锛?.25Not allowed Corner damage锛坅+b+c锛?/p>Hot face 鈮?/p>20 Cold face 鈮?/p>40 Edge damage锛坋+f+g锛?/p>Hot face 鈮?/p>20 Cold face 鈮?/p>40 Application Bond corundum brick is a high grade refractory material, suitable for high temperature kiln under various atmosphere conditions. Bond corundum brick is mainly used in blast furnace and off-furnace refining furnace in metallurgical industry, as well as in ironmaking blast furnace and hot blast furnace, off-furnace refining furnace, sliding water device, glass furnace and petrochemical industry furnace. The external dimensions, physical and chemical indexes and service life of Bond corundum brick have met the demand of high temperature furnace. Product packing Wooden pallets (according to the requirement of customer) Production line of bond refractory brick:Bond Refractory Brick website:http://www.ch-refractory.com/refractory-brick/bond-refractory-brick/
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