 |
Refractories for Blast Furnace
The list is illustrative and does not cover the full range of
products and some of the improved items which have been recently
developed.
| BF Stack Lining |
A |
B |
C |
D |
| Al2O3 % |
39 |
42 |
54 |
42 |
| B.D. (gm/cc) |
2.20 |
2.25 |
N.A. |
N.A. |
| A.P. % |
19 |
16 |
23 |
12 |
| CCS (kg/cm2) |
400 |
500 |
300 |
700 |
| RUL (ta °C) |
1450 |
1480 |
1480 |
1500 |
| PLC % |
±0.5 |
±0.3 |
±0.5 |
±0.2 |
| (at °C/2 hrs) |
1450 |
1500 |
1500 |
1450 |
| BF Bottom Lining |
A |
B |
C |
| Al2O3 % |
62 |
63 |
62 |
| A.P. % |
15 |
15 |
15 |
| CCS (kg/cm2) |
600 |
600 |
600 |
| RUL (ta °C) 4kg/cm2 |
1500 |
1500 |
1500 |
| PLC % (at 1450°C/2 hrs) |
±0.2 |
±0.2 |
±0.2 |
| BF Tap hole |
A |
B |
| Al2O3 % |
72 |
70 |
| SiC % |
N.A. |
13 |
| A.P. % |
17 |
14 |
| CCS (kg/cm2) |
500 |
80 |
| (at °C) |
N.A. |
400 |
| RUL (ta °C) 4kg/cm2 |
1650 |
N.A. |
| PLC % (at 1500°C/2 hrs) |
±0.5 |
N.A. |
| BF Trough |
A |
B |
C |
D |
| Al2O3 % |
70 |
70 |
70 |
71-73 |
| SiC % |
10-15 |
22 |
15 |
18-20 |
| A.P. % |
N.A. |
13.7 |
N.A. |
N.A. |
| B.D.(gm/cc) |
2.8 |
3.1 |
2.9 |
2.8 |
| (at °C/24 hrs) |
110 |
1000 |
110 |
1500 |
| CCS (kg/cm2) |
600 |
650 |
600 |
500 |
| (at °C/3 hrs) |
1400 |
1000 |
1450 |
1500 |
| PLC % |
+0.50 |
N.A. |
+0.12 |
+0.80 |
| (at °C/3 hrs) |
1400 |
N.A. |
1100 |
1500 |
| MOR (kgcm2)
(110°C/24 hrs) |
75 |
74 |
N.A. |
N.A. |
| Refractoriness (°C) |
N.A. |
1650 |
1820 |
1700 |
| BF Stove Checker |
A |
B |
C |
D |
E |
| Al2O3 % |
70 |
62 |
62 |
63 |
0.7 |
| SiO2 % |
N.A. |
N.A. |
N.A. |
N.A. |
95 |
| B.D. (gm/cc) |
2.55 |
N.A. |
N.A. |
2.47 |
N.A. |
| A.P. % |
18 |
24 |
24 |
20 |
21 |
| CCS (kg/cm2) |
500 |
250 |
250 |
400 |
300 |
| RUL (2kg/cm2) (ta
°C) |
1700 |
1450 |
1500 |
N.A. |
N.A. |
| PLC % |
±0.2 |
±0.4 |
±0.4 |
±0.2 |
±0.2 |
| (at 1500°C) |
4 hrs |
4 hrs |
4 hrs |
2 hrs |
2 hrs |
| Creep (N/mm2 at
1500°C/20-50hrs) |
N.A. |
N.A. |
N.A. |
0.2 |
0.2 |
| Spalling at 1300°C (cycles) |
N.A. |
N.A. |
8 |
N.A. |
N.A. |
| Ceramic Burner Blocks |
A |
B |
| Al2O3 % |
53 |
64 |
| Fe2O3 % |
1.7 |
1.5 |
| B.D.(gm/cc) |
2.35 |
2.50 |
| A.P. % |
20 |
22 |
| CCS (2kg/cm2) |
40 |
45 |
| RUL (ta °C) |
1350 |
1450 |
| PLC % (at °C/2 hrs) |
±0.1 |
±0.1+0.2 |
| (at °C)/4 hrs |
1400 |
1500 |
| MOR at room temp (Nmm2) |
15 |
15 |
| Creep % (2kgcm2/20-50
hrs) |
0.2+0.03 |
0.2+0.03 |
| (at °C) |
1350 |
1500 |
|
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