 |
Low Cement Castables
The list is illustrative and does not cover the full range of
products and some of the improved items which have been recently
developed.
| Low Cement Castables |
A |
B |
C |
D |
E |
F |
| Al2O3 % |
70 |
90 |
80 |
90 |
70 |
70 |
| SiC % |
N.A. |
N.A. |
N.A. |
N.A. |
15 |
N.A. |
| Max service Temp. (°C) |
1650 |
1800 |
N.A. |
N.A. |
N.A. |
1650 |
| Grading (mm) |
0-5 |
0-5 |
N.A. |
N.A. |
N.A. |
0-5 |
| B.D.(gm/cc) |
2.80 |
2.90 |
2.93 |
3.02 |
2.90 |
2.65 |
| PLC % |
±0.50 |
±0.40 |
-0.18 |
±0.20 |
+0.12 |
±0.50 |
| (at °C/3 hrs) |
1400 |
1400 |
N.A. |
N.A. |
800 |
1450 |
| Refractoriness (°C) |
N.A. |
N.A. |
1820 |
1820 |
1820 |
1790 |
| CCS (kg/cm2) (at
110°C/24 hrs) |
700 |
1000 |
860 |
980 |
200 |
700 |
| MOR |
N.A. |
N.A. |
1200 |
1290 |
40 |
N.A. |
| (at °C/3 hrs) |
N.A. |
N.A. |
1550 |
1550 |
800 |
N.A. |
| Insulating Castables |
A |
B |
C |
| Al2O3 % |
40 |
45 |
63 |
| SiO2 % |
42 |
42 |
26 |
| B.D. (kg/m3) |
1430 |
1600 |
1550 |
| PLC % (at 1100°C/3 hrs) |
±0.2 |
±0.2 |
±0.5 |
| Refractoriness (°C) |
1430 |
1430 |
1600 |
| CCS (kg/cm2) (at
110°C/24 hrs) |
100 |
180 |
140 |
| MOR (at 110°C/24 hrs) |
18 |
90 |
40 |
| Thermal conductivity (Kcal/m hr
500°C) |
0.42 |
0.44 |
0.42 |
| Insulating bricks |
A |
B |
C |
| Al2O3 % |
40 |
70 |
72 |
| A.P. % |
60 |
N.A. |
N.A. |
| B.D. (gm/cc) |
1.10 |
1.20 |
1.35 |
| PLC % |
±1.0 |
+0.8 |
-0.5 |
| (at °C/5 hrs) |
1350 |
1600 |
N.A. |
| (at°C/24 hrs) |
N.A. |
N.A. |
1450 |
| Refractoriness (°C) |
1400 |
1825 |
N.A. |
| CCS (kg/cm2) (at
110°C/24 hrs) |
40 |
50 |
35 |
| Thermal conductivity (Kcal/m
hr°C) |
0.35 |
0.42 |
0.64 |
| (at °C) |
500 |
500 |
1000 |
| Ceramic Fibre |
A |
B |
| Al2O3 % |
43-47 |
32-36 |
| SiO2 % |
53-57 |
44-48 |
| ZrO2 % |
N.A. |
16.5-19.5 |
| Temp. Limit (°C) |
1260 |
1425 |
| Tensile strength (128kg/m3)
(Kpa) |
30-60 |
30-60 |
| Linear shrinkage (%) |
2.4-3.2 |
<3.5 |
| (at °C/24 hrs) |
1200 |
1400 |
| Sp.Heat capacity at 980°C
(kj/kg°K) |
1.07 |
1.07 |
| Thermal conductivity at 800°C
(W/mK) |
0.18 |
0.17 |
|
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