Patent ID: 6066289
Filing Date: 2000-05-23
Classification: B01F,C22B,C23C,Y02P

Abstract:
In an improved baffle heater for heating molten metal passing through a treatment bay wherein the improvement comprises a baffle heater for location in said treatment bay in contact with said molten metal, said baffle heater comprised of:(a) a body of silicon based refractory inert to said molten metal, said body employing a non-wetting agent to minimize wetting of the refractory with the molten metal;(b) at least one heating element receptacle in said body;(c) a contact medium provided in said receptacle for improved conduction of heat from said heating element to said body, said contact medium selected from low melting metal and a powder material; and(d) at least one electric heating element positioned in said receptacle for heating said body which transfers heat to said molten metal, said element employing a nickel-based metal sheath in contact with said refractory, the metal sheath protected from said molten metal by said refractory, said metal sheath highly resistant to corrosive attack by components of said non-wetting agent at temperatures in the range of 1000 to 1500.degree. F.