Alumina hollow ball insulating brick


Application Range:

Mainly used in refractory furnace lining, industrial ceramics, electronic ceramics, petrochemical, Metallurgy and other industries high-temperature lining and ultra-high-temperature furnace insulation materials.

 
 Physical and chemical indicators:

project	Alumina Hollow Ball Brick			High purity alumina hollow ball Brick
model	85砖	90砖	99砖	99砖
Maximum operating temperature	1750	1800	1800	1800
Al2O3%	≥85	≥90	≥99	≥99.3
SiO2%	≤14	≤9	≤0.3	≤0.15
Fe2O3%	≤0.2	≤0.2	≤0.2	≤0.1
Bulk density g/cm3	1.4-1.9	1.4-1.9	1.5-1.8	≤3.0
Mpa Cold crushing strength	≥18	≥18	≥15	≥12
℃（0.1Mpa,0.6%） Refractory under load	≥1700	≥1700	≥1700	≥1700
% （1600℃×8h）Reheating linear change rate	±0.3	±0.2	±0.25	±0.25
0-6thermal expansivity	∽7.8	∽8.0	∽8.6	∽8.6
w/(m.k)  thermal conductivity	≤0.55	≤0.6	0.75≤	≤0.75

 
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Henan Guangda Refractories Co., Ltd is a high-tech enterprise which is dedicated to the refractory materials research and development, production, trade and engineering. Our company owns a professional technical research and development team that has been engaged in the refractory materials for decade years, owns advanced production equipments and testing equipment with the excellent marketing team. Our company has a sound management system for the market development and after-sale service. We will, as always, insist on the principle of quality first, customer first, putting quality and customers first, wholeheartedly provide the best quality......