High Strength Refractory Brick Fire Proof Bricks For Roller Hearth Kiln

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Al2O3%,≥:	55	Fe2O3 %, ≤:	1.2
Bulk Density (g/cm3), ≥:	2.45	Apparent Porosity (%), ≤:	17
Cold Crushing Strength (Mpa),≥:	60	Thermal Expansion Coefficient(1000°C),≤:	0.55

Fire proof refractory brick , Refractory Products For Roller Hearth Kiln

Description:

Refactory brick in roller kiln must be have a high temperature resistance ,and a high thermal shock resistance ,because the roller kiln is away in the running situation ,so this kind of refractory brick should have a high strength ,and can resistant the wearing situation .in a quick description,the refractory brick should have some basic feature in following:
1. Thermal shock resistance;
2. high strength;
3. good wear resistance.
4. a high thermal stability .

Applications:

1. Steel furnaces
2. Iron making furnaces
3. Glass kiln
4. Ceramic tunnel kiln
5. Cement kiln

Specifications:

Andalusite bricks

Product Index		HZ-55	HZ-62	HZ-65
Chemical analysis	Al2O3%	≥55	≥62	≥65
Chemical analysis	Fe2O3 %	≤1.2	≤1.2	≤1.2
Physical properties	Bulk density (g/cm3)	≥2.45	≥2.5	≥2.5
	Apparent porosity (%)	≤17	≤17	≤17
	Cold crushing strength (Mpa)	≥60	≥60	≥60
	Refractoriness under load(°C)	≥1600	≥1650	≥1680
	Thermal shock resistance	Good	Better	Better
	Thermal expansion coefficient(1000°C)	≤ 0.55	≤ 0.55	≤ 0.55
	Creep resistance 20-50h,(%)	1350°C <0.2	1400°C <0.2	1450°C <0.2