 |
Typical
Product Specification of Indian Refractories - Basic
Bricks
Some typical specifications of Indian refractories
commonly used in the furnaces and kilns in steel,
cement, non-ferrous metals and glass industries are
given below. These are illustrative and do not cover the
full range of products and some of the improved items
which have been recently developed.
|
DIRECT BONDED BASIC BRICKS
|
|
CHEMICAL
PROPERTIES |
|
|
|
|
MgO
(%) (Min) |
60
|
57
|
55
|
|
Cr
2 O3 (%) (Min) |
16
|
21
|
18
|
|
SiO
2 (%) (Max) |
3
|
2.5
|
1.5
|
|
PHYSICAL
PROPERTIES |
|
|
|
|
A.P.
(%) (Max) |
18
|
18
|
18
|
|
C.C.S.
(kg/cm²) (Min) |
400
|
500
|
400
|
|
RUL
(ta°C) (Min) (2 kg/cm²) |
1700
|
1750
|
1750
|
|
MOR
(kg/cm²) (Min) |
|
|
|
|
at
1400°C |
0
|
100
|
0
|
|
at
1500°C |
40
|
0
|
40
|
|
Application |
AOD, OTB
& VOD wear
lining
|
|
MAGNESIA CARBON BRICKS
|
|
CHEMICAL
PROPERTIES |
|
|
|
|
|
MgO
(%) (Min) in SWM as used |
97
|
97
|
97
|
97
|
|
Fired
Carbon (%) (Min) |
5
|
8
|
12
|
18
|
|
PHYSICAL
PROPERTIES |
|
|
|
|
|
A.P.
(Vol. %) (Max) |
5
|
5
|
5
|
5
|
|
B.D.
(gm/cc) (Min) |
3
|
2.95
|
2.90
|
2.85
|
|
C.C.S.
(kg/cm²) (Min) |
500
|
500
|
400
|
300
|
|
MOR
(kg/cm²) (Min) at 1400°C |
90
- 120
|
90
- 120
|
90
- 100
|
90
- 100
|
|
BASIC BRICKS FOR GLASS
INDUSTRIES REGENERATORS
|
|
CHEMICAL
PROPERTIES |
|
|
|
|
MgO
(%) (Min) |
88 -
90
|
94
|
97.5
|
|
Fe
2 O3 (%) (Max) |
0.8
|
1.6
|
0.2
|
|
CaO
(%) (Max) |
2.5
|
1.9
|
1.5
|
|
SiO
2 (%) (Max) |
6.5
|
2.8
|
0.7
|
|
PHYSICAL
PROPERTIES |
|
|
|
|
B.D.
(gm/cc) (Min) |
|
2.85
|
2.95
|
|
A.P.
(%) (Max) |
20
|
18
|
17
|
|
C.C.S.
(kg/cm²) (Min) |
350
|
500
|
450
|
|
PCE
(SK) (Min) |
38
|
40
|
42
|
|
RUL
(ta°C) (Min) (2 kg/cm²) |
1550
|
1650
|
1700
|
|
PLC
(%) (Max) at 1600°C for 2hrs. |
0.5
|
0.5
|
0.5
|
|
BASIC GUNNING MATERIAL
|
|
CHEMICAL
PROPERTIES |
|
|
MgO
(%) (Min) |
85
|
|
Cr
2 O3 (%) (Min) |
0
|
|
PHYSICAL
PROPERTIES |
|
|
Refractoriness
(SK) (Min) |
38
|
|
PLC
(%) after firing to 1550°C for 2hrs. |
-1.5
|
|
CCS
(kg/cm²) (Max) after firing to 1500°C for 2hrs. |
200
|
|
Grading
(mm) |
0-3
|
|
Application |
BOF,
EAF
|
|
BASIC RAMMING MASS
|
|
CHEMICAL
PROPERTIES |
|
|
|
MgO
(%) (Min) |
95
|
87
|
|
Fe
2 O3 (%) (Max) |
0.2
|
6
|
|
SiO
2 (%) (Max) |
2
|
4
|
|
PHYSICAL
PROPERTIES |
|
|
|
Setting |
Chemical
|
Chemical
|
|
Sintering
temp. (°C) |
1550
|
1200
|
|
Grading
(mm) |
0.5
|
0.8
|
|
Application
temp. (°C) |
1750
|
1750
|
|
Application |
Special
low Silica high MgO compound for ramming or vibro-casting Especially
suitable
for ramming tap holes of BOF |
Dry
ramming mass for EBT-UHP-EAF bottom |
|
|
