 |
Refractories for Basic Oxygen Furnaces
The list is illustrative and does not cover the full range of
products and some of the improved items which have been recently
developed.
| Magnesite/MgCr bricks |
A |
B |
| MgO % |
87 |
70 |
| Cr2O3 % |
N.A. |
7-12 |
| A.P. % |
20 |
20 |
| CCS (kg/cm2) |
400 |
350 |
| RUL (ta °C) |
1600 |
1580 |
| Mag Carbon/AMC bricks |
A |
B |
C |
D |
E |
| MgO % |
97 |
97 |
90 |
95 |
14 |
| Al2O3 % |
N.A. |
N.A. |
N.A. |
N.A. |
75 |
| FC % |
5 |
18 |
8-10 |
10 |
6 |
| A.P. % |
6 |
5 |
4 |
6 |
6 |
| B.D. (gm/cc) |
3.00 |
2.85 |
2.92 |
2.90 |
2.80 |
| CCS (kg/cm2) |
500 |
300 |
400 |
400 |
400 |
| MOR at room temp kg/cm2 |
150 |
100 |
N.A. |
N.A. |
N.A. |
| MOR at 1400°C kg/cm2 |
40 |
100 |
90 |
40 |
N.A. |
| Magnesite bricks for BOF/EAF |
A |
B |
C |
D |
| MgO % |
87 |
91 |
85 |
40 |
| Cr2O3 % |
N.A. |
N.A. |
N.A. |
18 |
| A.P. % |
18 |
18 |
22 |
24 |
| CCS (kg/cm2) |
500 |
600 |
350 |
250 |
| RUL (ta °C) |
1600 |
1600 |
1550 |
1550 |
| PLC % (at 1600°C/2 hrs) |
N.A. |
N.A. |
+0.5 |
+0.5 |
| Magnesite bricks for
BOF/VAD/VOD Ladle |
A |
B |
| MgO % |
96 |
60 |
| Cr2O3 % |
N.A. |
15 |
| A.P. % |
17 |
22 |
| CCS (kg/cm2) |
500 |
350 |
| RUL (ta °C) |
1700 |
1650 |
| Direct Bonded bricks for
VOD/AOD |
A |
B |
C |
| MgO % |
60 |
66 |
65 |
| Cr2O3 % |
15 |
13 |
15 |
| A.P. % |
18 |
18 |
21 |
| CCS (kg/cm2) |
500 |
400 |
350 |
| RUL (ta °C) |
1740 |
1700 |
1650 |
| PLC % (at 1600°C) |
N.A. |
N.A. |
+0.5 |
|
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