High Alumina Refractory Cement

$High Alumina Refractory Cement$

Al2O3% 50-79

Initial Setting Time (min) 30-90

Final Setting Time (min) 90-360

Refractoriness（°C） 1400-1800

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Introduction of Refractory Cement

Refractory cement is mainly made of calcium aluminate. It is a hydraulic binder that is designed to resist thermal and mechanical stresses, making it an excellent choice for environments that experience high temperatures, such as furnaces, kilns and other industrial applications.

Refractory cement is also called calcium alumina cement, heat resistant cement, monolithic refractory cement, moldable refractory cement, fireproof cement and so on.

Item		CA-50	CA-70			CA-75			CA-80
Chemical Composition(%)	Al2O3	≥50	≥69			≥73			≥79
	CaO	≤38	28-30			25-27			21-23
	SiO2	≤6.0	≤0.4
	Fe2O3	≤2.5	≤0.3
Specific Surface (cm2/g)		≥3000	≥5000			≥5500			≥6000
Bonding Time	Initial Bonding（min）	≥30	30	60	90	30	60	90	30	60	90
	Final Bonding（h）	≤6	≤6			≤6			≤6
24h（MPa）	Flexural Strength	≥10	≥6			≥6.5			≥6.5
	Crushing Strength	≥70	≥40			≥40			≥35
Refractoriness（°C）		1400	1700			1750			1800