Long nozzle serves to protect the molten steel casting between casting ladle and tundish. It helps avoid oxidation of molten steel and prevent it from aborbing nitrogen from the ambient. The aluminium oxide graphit protective pipe shaped by level static pressure has advantages of thermal shock resistance,anti-errosion etc.
|
Item # Brand |
CLT-A |
CLT-B |
|
Proper |
Air exhaust layer |
Proper |
Slag line |
|
Al203% Not less than |
40 |
85 |
50 |
|
|
C% Not less than |
27 |
|
25 |
|
|
ZrO3% Not less than |
|
|
|
20 |
|
Apparent porosity rate not less than % |
<=20 |
|
12-20 |
|
|
Compression resistance under ambient temperature Mpa Not less than |
22 |
|
15 |
|
|
Anti-crack abiblity under ambient temperature Mpa Not less than |
7 |
|
5 |
|
|
Thermal shock stability, times more than |
6 |
|
6 |
|
|
I/min Air vent rate |
|
100 |
|
|
