High Alumina Refractory Bricks

High Alumina Refractory Bricks

1.High refractoriness,
2.High temperature strength,
3.High thermal stability,
4.Neutral refractory,
5.Good resistance to acid and basic slag corrosion,
6.High refractoriness under load,
7.High temperature creep resistance,
8.Low apparent porosity.

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High Alumina Refractory Bricks Introduction
  
High alumina brick is a kind of alumina-silicate refractory material with content of alumina oxide more than 48% Al2O3. It is calcined and formed by the raw material of banxite or the material with high content of AL2O3. High thermal stability, the refractoriness is more than 1770℃. Good slag resistance, used for the liner of masonry steel-making electric stove, glass furnace and cement revolver.
 
Use Of High Alumina Refractory Bricks
 
High alumina brick is widely used for Widely used in blast furnaces, Hot Blast Stove,Steel ladle lining, Reheating furnace, Cement kiln, Tunnel kiln,boiler, coke oven, carbon furnace, glass kiln , Steel smelting furnace and various kiln lining and thermotechnical equipment, etc.
 
Advantages of Special Grade High Alumina Refractory Bricks
 
Rongsheng's high-alumina bricks are of good quality, especially the special grade high-alumina bricks. Because this kind of high-alumina bricks and ordinary high-alumina bricks are very different in aluminum content. The general high-aluminum brick has an aluminum content of 55%-75%, and the special-grade high-aluminum brick has an aluminum content of more than 85%. As we all know, the aluminum content of refractory bricks directly determines the quality of high alumina bricks. This is also the reason why the special grade high-alumina bricks are relatively expensive.
 
Rongsheng Refractory High Alumina Refractory Bricks Technical Data 
 
High Alumina Refractory Brick Physical and Chemical Index:
Item  Properties 
RS-80 RS-75 RS-65 RS-55 RS-48
Al2O3 (%) 80 ≥75 ≥65 ≥55 ≥48
Refractoriness  (°C ) ≥1790  ≥1790 ≥1790 ≥1770 ≥1750
Bulk density  (g/cm3) 2.65 2.5 2.45 2.4 2.3
Softening temperature under load  (°C ) 1530 ≥1520 ≥1500 ≥1470 ≥1420
Linear changes on reheating (%) 1500°CX2H 0.1 0.1 0.1 0.1 0.1
1450°CX2H -0.4 -0.4 -0.4 -0.4 -0.4
Apparent porosity (%) 22 ≤23 ≤23 ≤22 ≤22
Cold crushing strength (Mpa) 55 ≥50 ≥45 ≥40 ≥35
Application  steel furnace, glass furnace, sodium silicate furnace, ceramic shuttle kiln, cement rotary kiln, blast furnace, electric furnace, blast furnace and reverberatory furnace.

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