Multi-function lance for a vacuum degassing chamber and a...

Details Multi-function lance for a vacuum degassing chamber and a... Multi-function lance for a vacuum degassing chamber and a...

C - Chemistry, Metallurgy

21

C

C21C 7/10 (2006.01) C21C 5/46 (2006.01) C21C 5/54 (2006.01) C21C 7/064 (2006.01) C21C 7/068 (2006.01) F23D 14/22 (2006.01) F23M 11/04 (2006.01)

Patent

CA 2308744

A multi-function lance for insertion into a vacuum degassing chamber, includes a top-blown oxygen lance provided as a path for gaseous oxygen. A nozzle is provided at a downstream end of the oxygen path used for blowing oxygen onto a molten metal. A water-cooled jacket surrounds the outer periphery of the top-blown oxygen lance. At least a set of paths for a fluid fuel and a gas for burning the fuel is positioned in a multi-function lance,namely in the water- cooled jacket, and a combustion burner is provided at a downstream end of the path. By using the multi-function lance according to the present invention, not only a safer and shorter preheating operation is enabled, but also oxygen lancing, temperature elevation of molten steel, and heating of the vacuum degassing apparatus itself are smoothly realized.

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