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 (T₂)	≥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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