High Alumina Cement

1.High initial strength
2.Sulfate corrosion resistance,
3.Biological acid erosion
4.High temperature resistance,
5.Fast coagulation,etc.

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Description

High Alumina Cement Introduce

High Alumina Cement (previously called bauxite cement) is a kind of grinding hydraulic cementing materials with clinker about 50% alumina content and has calcium aluminate as the main material, which is also called refractory cement, which can be made to low cement high alumina castable to build or repair all kinds of furnace and kilns for thermal insulation or acid erosion resistance with high strength.

Application of High Alumina Cement

High alumina cement is mainly used to configure refractory castable such as high alumina low cement castable which can build or repair furnace or kiln for heat insulation or high temperature erosion.

High Alumina Cement Technical Data

Product		CA-65	CA-68	CA-70	CA-75	CA-80
Chemical Composition (%)	Al2O3	64-66	67-69	69-71	73-75	77-80
	CaO	32-34	29-31	27-29	23-25	18-20
	SiO2	1.8	1.2	0.3	0.3	0.3
	Fe2O3	0.6	0.6	0.3	0.3	0.3

Specific Surface (cm2/g)		4500	4500	5000	5500	7000
Setting time (h:min)	Initial setting (min)	0:40	0:40	0:40	0:45	0:45
Setting time (h:min)	Final Setting (min)	8:00	8:00	10:00	10:00	10:00

Cold Modulus of Rupture (MPa)	24 hour	6.0min	6.0min	6.0min	6.0min	5.0min
Cold Modulus of Rupture (MPa)	72 hour	8.0min	8.0min	8.0min	8.0min	6.0min
Cold Crushing Strength (Mpa)	24hour	45.0min	45.0min	45.0min	45.0min	35.0min
Cold Crushing Strength (Mpa)	72hour	70.0min	70.0min	70.0min	70.0min	60.0min

Refractoriness (°C)		1680	1710	1730	1750	1770