Products

A wide variety of products go into the crucible system for induction melting.

Crucibles can be isostatically pressed, for uniform density, or cast in capacities up to 3000kg.  Backing the crucible is a monolithic rammed lining, a slip plane and possibly an outer sleeve or a quick-change crucible-basket assembly; atomising or metering nozzles may be required for bottom pouring

The casting manufacturing system also allows for special shapes to be made, such as ladles, tundishes, launders, pouring spouts.

induction_melting_crucibles

Crucible Sleeves

Sleeves are a common backup container for the melting crucible, the gap between being filled with an expansile refractory mix. As they are in a non-critical position and do not experience the heat or chemical interaction that the crucible experiences, they can be made from a less refractory and cheaper material; the main qualities should be high strength and good thermal flexibility.

From the Aluminosilicate range, SILLIMANITE S1 is the standard backup material. It has good thermal cycling capabilities and has adequate strength to withstand the thermal expansion of the crucible and backing material during multiple thermal cycles. The MULLITE ML80 product has a higher strength and a higher temperature capability if needed.

To maintain compatibility with the crucibles used for melting precious metals in terms of thermal behaviour, the sleeve can be supplied as a ZIRCON product. It has good thermal cycling properties and is quite economical to run.