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Cement Industry
The list is illustrative and does not cover the full range of
products and some of the improved items which have been recently
developed.
| Refractories for Cement plant
Pre Heaters |
A |
B |
C |
| Al2O3 % |
40 |
30 |
60 |
| Fe2O3 % |
2.5 |
3.0 |
2.5 |
| RUL (ta °C) |
1450 |
1350 |
1500 |
| CCS (kg/cm2) |
350 |
300 |
400 |
| AP % |
22 |
25 |
20 |
| Reheat linear change % |
0.8 |
1.0 |
0.5 |
| at °C for 2 hrs |
1450 |
1350 |
1450 |
| Spalling resistance at 1000°C
air quenching (cycles) |
30 |
25 |
30 |
| Thermal conductivity at 700°C
(K.Cal/M/hr/°C) |
1.2 |
1.0 |
1.4 |
| Refractories for Cement Rotary
Kilns |
A |
B |
C |
D |
E |
| Al2O3 % |
80 |
70 |
70 |
60 |
45 |
| Fe2O3 % |
2.0 |
2.5 |
1.8 |
2.5 |
2.5 |
| RUL (ta °C) |
1550 |
1500 |
1550 |
1480 |
1450 |
| CCS (kg/cm2) |
600-800 |
450-600 |
350 |
400 |
N.A. |
| AP % |
20 |
23 |
23 |
24 |
24 |
| PLC % |
1.0 |
2.0 |
0.5 |
1.0 |
0.8 |
| at °C for
2 hrs |
1450 |
1450 |
1500 |
1450 |
1450 |
| Spalling resistance at 1000°C
air quenching (cycles) |
30 |
30 |
N.A. |
30 |
12 |
| Thermal conductivity at 700°C
(K.Cal/M/hr/°C) |
1.9 |
1.6 |
N.A. |
1.4 |
1.2 |
| Basic Refractories for Cement
Rotary Kilns |
A |
B |
C |
D |
E |
| MgO % |
72 |
63 |
60 |
60 |
60 |
| Cr2O3 % |
6 |
11 |
12 |
13 |
15 |
| AP % |
23 |
22 |
18 |
18 |
20 |
| CCS (kg/cm2) |
200 |
300 |
300 |
300 |
300 |
| RUL (ta °C) |
1500 |
1570 |
1650 |
1700 |
1650 |
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