 |
Typical
Product Specification of Indian Refractories - Special
Products
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.
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SLIDE GATE REFRACTORIES
|
|
SLIDE
PLATES
|
SLIDE
PLATES
|
NOZZLES
|
WELL
BLOCKS
|
|
CHEMICAL PROPERTIES |
|
|
|
|
|
Al2O3(%) (Min) |
88
|
0
|
88
|
90
|
|
MgO (%) (Min) |
0
|
95
|
0
|
0
|
|
SiO 2 (%) (Max) |
8
|
1.5
|
0
|
0
|
|
Fe2 O3 (%) (Max) |
0.2
|
0
|
0.2
|
0
|
|
C (%) (Min) |
0
|
0
|
0
|
2.0
|
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PHYSICAL PROPERTIES |
|
|
|
|
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B.D. (gm/cc) (Min) |
2.95
|
2.85
|
3.00
|
2.70
|
|
A.P. (Vol. %) (Max) |
19
|
19
|
20
|
19
|
|
MOR (Kg/cm²) (Min) |
|
|
|
|
|
at 1400°C |
0
|
0
|
0
|
0
|
|
at 1500°C |
100
|
100
|
0
|
0
|
|
Remarks |
For Ingot Teeming Ladle |
For Continuous Casting Ladle |
Nozzles for Slide gate System |
Well Blocks for Slide gate System |
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ZIRCON AND
ZIRCON MULLITE BRICKS FOR GLASS INDUSTRIES
|
|
ZIRCON
BRICKS
|
ZIRCON
MULLITE BRICKS
|
|
CHEMICAL PROPERTIES |
|
|
|
Al2O3
(%) (Min) |
0
|
68
|
|
ZrO2 (%)
(Min) |
63
|
18
|
|
PHYSICAL PROPERTIES |
|
|
|
A.P. (Vol. %) (Max) |
20
|
21
|
|
C.C.S. (Kg/cm² ) (Min) |
500
|
500
|
|
RUL (ta°C) (Min) |
1600
|
1600
|
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MULLITE
BRICKS FOR GLASS INDUSTRIES
|
|
CHEMICAL
PROPERTIES |
|
|
Al 2O3
(%) |
70 ± 1
|
|
Fe2 O3 (%) (Max) |
0.5
|
|
PHYSICAL
PROPERTIES |
|
|
Refractoriness
(Sk) (Min) at 1800°C |
36
|
|
B.D. (gm/cc)
(Min) |
2.55
|
|
A.P. (Vol.
%) (Max) |
18
|
|
C.C.S. (Kg/cm² )
(Min) |
500
|
|
RUL
(ta°C) (Min) |
1700
|
|
PLC (%)
(Max) at 1450°C for 2 hrs. |
±0.2
|
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CONTINUOUS CASTING REFRACTORIES |
|
SHROUD
|
MONOBLOCK
STOPPER
|
SUBENTRY
NOZZLE
|
TUNDISH
NOZZLE
|
|
CHEMICAL PROPERTIES |
|
|
|
|
|
|
|
C (%) |
31.7
|
22.4
|
26.8
|
25.4
|
18.6
|
15.8
|
|
Al2O3(%) |
47.1
|
58.7
|
53.7
|
47.2
|
0
|
68.7
|
|
SiO 2 (%) |
19.4
|
8.8
|
9.5
|
22.3
|
8.7
|
8.6
|
|
ZrO2(%) |
0
|
0
|
0
|
0
|
69.2
|
0
|
|
PHYSICAL PROPERTIES |
|
|
|
|
|
|
|
A.P. (%) |
14.3
|
12.4
|
15.7
|
16.2
|
17.7
|
17.2
|
|
BD (gm/cc) |
2.27
|
2.53
|
2.4
|
2.3
|
3.27
|
2.5
|
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MOR (Kg/cm²) |
102
|
122
|
125
|
110
|
95
|
105
|
TE (%)
at 900°C |
0.25
|
0.33
|
0.3
|
0.3
|
0.4
|
0.42
|
|
Thermal Spalling Test |
3 cycles |
1 cycle |
3 cycles |
0
|
0
|
0
|
|
1500°C/ Water |
No crack |
No crack |
No crack |
|
|
|
|
Application |
Non preheat type
High corrosion
resistance |
Preheat type |
Non preheat type |
Preheat type |
Preheat type
High corrosion
resistance |
Preheat type
High corrosion
resistance |
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GAS PURGING
REFRACTORIES
|
|
POROUS
PLUG
|
SEATING
BLOCK
|
SLEEVE
|
|
CHEMICAL PROPERTIES |
|
|
|
|
Al 2O3 (%) (Min) |
88
|
75
|
85
|
|
Fe2 O3
(%) (Max) |
0
|
2.0
|
0.5
|
|
PHYSICAL PROPERTIES |
|
|
|
|
A.P. (Vol. %) (Max) |
20
|
21
|
21
|
|
B.D. (gm/cc) (Min) |
2.8
|
2.7
|
2.8
|
|
C.C.S. (Kg/cm²) (Min) |
900
|
300
|
300
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Flow rate (Ltrs/Min)
at 2 Kg/cm² (Min) |
500
|
0
|
0
|
|
Application |
Directional porosity
porous plug for longer purging in LF/VOD ladles |
For fixing the porous
plug in Ladle bottom |
For protection of well
block at the time of removal of plug |
|
CERAMIC FIBRE
|
|
CHEMICAL PROPERTIES |
|
|
Al2O3 (%) |
32 -
36
|
|
SiO 2 (%) |
44 -
48
|
|
ZrO2(%) |
16.5 -
19.5
|
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PHYSICAL PROPERTIES |
|
|
Classificaiton Temp. (°C) |
1425
|
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Colour |
White
|
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Tensile Strength 128 Kg/m³ (K Pa) |
30.6
|
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Linear Shrinkage (%) |
|
|
at 1200°C for 24 hrs. |
0
|
|
at 1400°C for 24 hrs. |
<3.5
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Specific Heat Capacity (Kj/Kg°K) at 980°C |
1.07
|
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Melting Point (°C) |
>
1650
|
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Fibre Miameter (m) (Arithmetic Mean) |
1.5 -
3.0
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