Introduction & Application
These are clay graphite products used for replacing the
transfer ladle & holding ladle refractory lining. They have
non wetting property & hence provide longer lining life.
They are available with baffle plates. Any other specific
customization request can be worked upon. They provide
best performance below 1600 C. A few of their characteristics
include high erosion resistance, quick pre-heating, very high
thermal shock resistance & their ability to maintain temperature
for a long time. They are easy to replace & repair thereby saving
on labor costs & downtime.
Venting The Ladle
- Ladle shells should be vented to ensure the release of moisture from
the Insulcast. Shells with a capacity less than 150 Kg should have four
6mm holes in the base (Including one in the centre) and four around the
side, well-spaced out. Shells with a capacity above 150Kg should have five 6mm holes in the base and six around the side.
- The setting material should be vented using two lengths of string or
"spun yarn" tied vertically around the liners so as to make four vents, or
for liners over 150 Kg capacity, three lengths to make six vents.
Installing The Liner
- Place a thick layer of Insulcast in the bottom of the shell.
- Bed the liner down firmly, squeezing the setting material up the sides
until the liner is level with the bottom of the shell.
- Ram more Insulcast down from the top all around, so that the liner is
firmly supported. The liner will rise during ramming, and should finish
up 3 – 6mm above the top of the shell.
Drying The Ladle
- The refractory materials should be allowed to air-set over night.
- Dry thoroughly for several hours, by torch or in an oven or by firing wood inside.
- Seal the joint between ladle and liner around the pouring spouts only, with
12mm depth of Salamander Morcem 900 mixed with water to a putty
consistency. Do not seal the vents.
- Thoroughly pre-heat cold ladles, as usual, before use.
It is dangerous to pour molten metal into a newly lined ladle, which has not been properly dried.
New ladles should not be filled until all emission of steam has ceased and the liner should be sufficiently
hot to char a piece of paper