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Low Cement Castables
The product range includes L.C. Castables of Different alumina content (Al2O3 varying From 45% to 90%) with service range between 1500o C to 1800o C. Theses are characterised by Al2O3 content and specific low Fe2O3 (less than 1 %) & low CaO (less than 1%) content. Also water requirement for casting is less than 5%. These castables have very short curing time requirement. These are suitable for use in places where very quick setting is required, thus reducing the downtime of Furnaces. These are being extensively used in furnaces like:
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Ladle back up lining.
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Sintering Furnace roof.
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Soaking pit covers.
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Tundish backup/safety lining.
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Hearth of Reheating Furnaces
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Rotary Kilns (various zones)
HIGH ALUMINA CASTABLES
The product range includes High Alumina Castables of different Alumina content varying from 50% up to 95%. The water requirement for casting is 7-10% and have a short curing time. These castables are used in reheating furnaces, steel
Ladles, and as a general purpose repair.
LOW CEMENT CASTABLES
VELCAST - LC
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VELCAST |
VELCAST |
VELCAST |
VELCAST |
VELCAST |
VELCAST |
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Physical Properties |
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Refractoriness Orton/(Co) Min. |
32 (1717) |
36 (1804) |
36 (1804) |
37 (1820) |
37 (1820) |
40 (1900) |
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Max. Service Temperature (oC) Min. |
1500 |
1600 |
1600 |
1650 |
1750 |
1800 |
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Bulk Density (gm/cc) Min. (110oC) |
2.3 |
2.6 |
2.8 |
2.9 |
2.9 |
3.0 |
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Cold Crushing Strength (Kg/Cm2) |
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at 110oC |
600 |
600 |
700 |
700 |
750 |
800 |
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at 800oC |
700 |
800 |
800 |
800 |
900 |
1000 |
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at 1100oC |
800 |
900 |
900 |
1000 |
1100 |
1150 |
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at 1500oc |
1000 |
1000 |
1100 |
1200 |
1200 |
1200 |
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at 1550oc |
1000 |
1000 |
1200 |
1200 |
1200 |
1250 |
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P.L.C |
±1.0 |
±0.8 |
±0.5 |
±0.5 |
±0.5 |
±0.4 |
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Water required For Casting |
5.0-6.0 |
4.5-5.0 |
4.5-5.0 |
4.5-5.0 |
3.5-4.5 |
3.5-4.5 |
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Max Grain Size (mm) |
5 |
5 |
5 |
5 |
5 |
5 |
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Chemical Analysis |
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Al2O3 (% Max.) |
45.0 |
60.0 |
70.0 |
80.0 |
90.0 |
90.0 |
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Fe2O3(% Max.) |
1.5 |
1.5 |
1.0 |
1.0 |
1.0 |
0.5 |
Note : Data represents typical average properties & do not constitute a specification.
STANDARD CEMENT CASTABLES
VELCAST - N & NS
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VELCAST |
VELCAST |
VELCAST |
VELCAST |
VELCAST |
VELCAST |
VELCAST |
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Physical Properties |
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Refractoriness (Co) Min. |
1550 |
1700 |
1665 |
1685 |
1670 |
1820 |
1750 |
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Max. Service Temperature (Co) Min. |
1400 |
1500 |
1500 |
1600 |
1600 |
1750 |
1700 |
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Bulk Density (gm/cc) Min. (110oC) |
2.10 |
2.50 |
2.10 |
2.20 |
2.20 |
2.80 |
2.80 |
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Cold Crushing Strength (Kg/Cm2) |
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at 110oC/24 Hrs. (min) |
300 |
350 |
350 |
350 |
400 |
550 |
650 |
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at 1450oC/2 Hrs. (min) |
270 |
450 |
350 |
- |
400 |
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P.L.C (% Max.) at 1400oC/2 Hrs. |
±1.0 |
±1.0 |
±1.0 |
±1.5 |
±1.5 |
±1.0 |
±1.0 |
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Max Grain Size (mm) |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
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Setting |
Hydraulic |
Hydraulic |
Hydraulic |
Hydraulic |
Hydraulic |
Hydraulic |
Hydraulic |
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Sintering (0oC) |
1250 |
1200 |
1250 |
1400 |
1350 |
1400 |
1400 |
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Chemical Analysis |
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AI2O3 (% Max.) |
40.0 |
70.0 |
50.0 |
60.0 |
62.0 |
90.0 |
88.0 |
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Fe2O3(% Max.) |
2.5 |
5.0 |
1.5 |
1.0 |
1.0 |
0.8 |
0.7 |
Note : Data represents typical average properties & do not constitute a specification.
