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 pdf-document (160 kb) |
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| Summary |
RADEX is a range of insulating cover powders designed
for use in the ladle or tundish to prevent heat loss
during casting. |
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| Description |
RADEX is a very low-density, free-flowing powder, formulated
to reduce heat loss to a minimum. It is normally supplied
in handlable paper sacks for the tundish or bulk bags
for the ladle. |
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| Application |
RADEX powders are usually added to the ladle surface
just before it leaves the secondary refining station
to make its way to the continuous casting machine. In
the tundish it is added when the steel reaches 1/3 to
2/3 full. The application rate is sufficient to give
a 25mm layer of powder on the surface of the steel. In
the case of the tundish it should be continually maintained
to provide a ‘black’ cover throughout the
casting process. |
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| Function |
Temperature control of the steel is vital in continuous
casting, particularly over long casting periods. Casting
should be conducted as close to the liquidus as possible
to ensure minimum segregation. To reduce the need to
cast with high superheat, it is essential to have an
efficient ladle or tundish insulating cover. The application
of RADEX powders minimises heat loss from the ladle and
the tundish. |
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| Benefits |
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Radiation heat losses from the top surface of the
ladle are reduced.
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Consistent metal temperatures in the ladle are
enhanced, providing smoother casting operation.
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The ladle metal surface can be covered with RADEX
in slag free tapping.
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Ladle service life is increased.
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High efficiency assures cost effectiveness.
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The need for preheated refractory lined tundish
lids is eliminated.
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