China light weight high alumina thermal insulation brick factory and manufacturers | Rongsheng

Short Description:

High alumina insulation brick is a kind of refractory, the main component of which is Al2O3. If Al2O3 content is higher than 90%, it is called corundum brick. Due to different resources, the standards of different countries are not completely consistent. For example, in European countries, the lower limit of Al2O3 content for high alumina refractories is 42%. In China, Al2O3 content in high alumina brick is generally divided into three grades: Grade I – Al2O3 content > 75%; grade II – Al2O3 content is 60-75%; grade III – Al2O3 content is 48-60%.

Product Detail

Product Tags

Technical Data:

Name Light Weight High Alumina Brick
LG-0.6 LG-0.8 LG-1.0
Bulk Density(g/cm3) 0.6 0.8 1.0
Cold Crushing Strength  (Mpa)≥ 1.9 2.9 4.0
Permanent Linear Change 1300℃*12h(%)≤ 0.5 0.5 0.5
Thermal ConductivityAverage Temperature 350±25℃ W/( m·K) ≤0.250 ≤0.320 ≤0.450
Refractoriness Under Load 0.1Mpa (℃) ≥ 1300 1350 1380
Al2O3(%)≥ 50 52 52
Fe2O3(%)≤ 1.8 1.6 1.5
Maximum Service Temperature (℃) 1300 1350 1380


High alumina insulation bricks are popularly used for the masonry of industrial kilns inner linings, such as blast furnaces, hot blast furnaces, electric furnace top, reverberator, rotary cement kiln and so on. Besides, high alumina bricks are also widely used as regenerative checker bricks, stopper of continuous casting system, nozzle bricks, etc.

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