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Spiro heat elements are made from thin walled tubes of Alpha Silicon Carbide, which are dense and resistant to oxidation. Spiro heat Elements operate in most industrial and laboratory Furnaces at temperatures upto 1600oC. Spiro heat Elements being a thin walled, fine grain form of reaction bonded Silicon Carbide, will withstand very rapid heating and cooling cycles, severe thermal shocks, and high Electrical loadings. The Spiro heat ranges of elements are available in different product forms to suit a variety of heating processes.Sic elements are rod shaped or tubular depending on the diameter. They have a central heating section referred to as a hot zone and two terminal sections called cold ends. (1) The cold ends are impregnated with silicon metal - referred to as one piece, and (2) low resistance cold ends which are furnace welded to the hot zone - referred to as a three piece or LRE (Low Resistance End) type. This lower electrical resistance cold end causes them to operate at a lower temperature. The extremities of the elements are metallized with aluminium to provide a low resistance contact surface to which the electrical connections are made using braided aluminium straps. |
| Application
• melting of glass and non-ferrous metal, • heat treatment of metals, • float glass production, • production of ceramics and electronics components, |
