Cordierite-mullite Refractory Brick

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Specifications

Cordierite-mullite brick
1. low thermal expansion coefficient,
2. excellent stability of thermal shocking

Alumina-Silica Refractory Series Products

Cordierite-mullite brick is of low thermal expansion coefficient, excellent stability of thermal shocking, it is used in assembly brick for hot blast stove.
Sintered mullite brick mineral component is mullite phase. It has the advantage of high temperature structural strength, strong resistance to chemical corrosion. It is used in the lining of high temperature kiln.
Silimanite bricks possesses the better refractoriness temperature under load and the good stability of thermal shocking. It is mainly used in the blast furnace, wind pipe of the blast heating cupola, the lime kiln, the discharging channel and cover board of the glass melting kiln.

Physical and chemical index :

Sillimanite Bricks
Cordierite brick
Corundum-Mullite Brick
Cordierite-Mullite Brick
M-68
M-72
GCS
JQS
AM-75
AM-80
JM
Al2O3 %
≥68
72
≥55
55±5
≥75
≥80
≥50
Fe2O3 %
≤1.5
≤1.5
≤1.5
≤1.5
≤2
MgO %
2.0
1.73~3
SiO2 %
≤45
Apparent Porosity %
≤21
≤19
≤17
≤25
≤17
≤17
≤23
Bulk Density g/cm3
≥2.45
≥2.50
≥2.45
≥2.30
≥2.55
≥2.60
≥2.30
Cold Crushing
Strength Mpa
≥50
≥60
≥55
≥40
≥70
≥70
≥70
Modulus of
Rupture Mpa
≥15
≥15
0.2Mpa Refractoriness
Under Load T
0.6
≥1580
≥1600
≥1550
(T
2)
≥1400
≥1680
≥1700
Reheat liner change 2h
1450°C
±0.2
Thermal
Shock Resistances
100°C water cycles
≥15
≥100
20-1000°C
Thermal Expansich
10
-6/°C
4.5-4.9

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