Situation

Both metal and bath crucibles are regularly relined with a refractory lining prior to returning to service. It is important that these linings are safely dried and preheated.

Problem

Traditional methods have used gas, oil or oxy‑fuel to preheat linings; but these energy sources generate polluting gases and are not as efficient as electricity for heat transfer.

Solution

An electrical preheating system has been designed and commercialised by STAS. It produces no pollutants and is virtually noise free. This means there is a considerable reduction in energy costs, with a total control over the entire heating cycle, thus ensuring a more uniform heating distribution prior to the first molten melt being poured.

Advantages

• Low operating, maintenance and capital costs.
• Automatic operation (PLC): no dedicated operator.
• No pollutants; noise free.
• Reduced energy costs.
• Better temperature control, no cold spots.