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- < Refractory Materials and Abrasives - < Refractory Cement
 
 

1. Refractory Cement (Aluminate Cement )

Aluminate cement is produced by bauxite and limestone. The raw materials are calcined in rotary klin and grinding the clinker, and the content of Al2O3 is 50-60%.

Items Unit CA-50-G5 CA-50-G6 CA-50-G7 CA-50-G9
Al2O3 % 50.00 min 50.00 min 50.00 min 51.00 min
CaO % 33.00 min 33.00 min  33.00 min  33.00 min 
SiO2 % 9.00 max 9.00 max 9.00 max 8.00 max
Fe2O3 % 3.00 max 3.00 max 3.00 max 3.00 max
TiO2 % 3.00 max 3.00 max 3.00 max 3.00 max
Specific Surface Area cm2/g 3000 min 3000 min 3000 min 4000 min
Beginning Set min 30 min 30 min 30 min 90 min
Ending Set hour 6 max 6 max 6 max 6 max
Bending Strength (1 day) Mpa 5.50 min 6.00 min 7.00 min 8.50 min
(3 day) Mpa 6.50 min 7.00 min 8.00 min 10.00 min
Compressive Strength (1 day) Mpa 40.00 min 45.00 min 50.00 min 70.00 min
(3 day) Mpa 50.00 min 55.00 min 60.00 min 80.00 min

Packing: 25Kgs bag in 1MT big bag or in 1MT big bag

2. Refractory Cement (High Aluminate Cement )

CA-70 or CA-80 is a pure calcium aluminate cement with alumina content of approx 70% or 80%. Firstly the clinker is produced by melting selected industrial aluminium oxide and fine limestone under strict mineralogical control in rotary kilns. After cooling, the surface area is approx 6000cm2/g or 7000 cm2/g after crushed by ball mills.

Items Unit CA-70 CA-80
Al2O3 % 68.5-71.5 78.5-81.0
CaO % 26.5-30.5 17.0-20.0
SiO2 % 0.50 max 0.50 max
Fe2O3 % 0.50 max 0.50 max
K2O+Na2O  % -- --
Specific Surface Area cm2/g 5500 min 7000 min
Beginning Set min 45 min 15 min
Ending Set hours 6 max  6 max
Bending Strength  (24h) Mpa 5.0 min 4.0 min
Compressive Strength  (24h)   Mpa 40.0 min 35.0 min

Packing: 25Kgs bag in 1MT big bag or in 1MT big bag