Method and apparatus for adding treating agents to molten metal

Details Method and apparatus for adding treating agents to molten metal Method and apparatus for adding treating agents to molten metal

C - Chemistry, Metallurgy

21

C

39/107, 53/367,

C21C 7/00 (2006.01) B22D 41/00 (2006.01)

Patent

CA 1037263

ABSTRACT OF THE DISCLOSURE A method and apparatus for adding treating agents to molten metal in which the agent, in wire-form is fed through a passage provided in an internally cooled stopper rod, thereby introducing the treating agent directly into the nozzle and to a stream of molten metal as it is discharged therethrough. The method is particularly applicable for adding treating agents to steel for completely deoxidizing same with agents such as aluminum, titanium or zirconium. The stopper rod is adapted to seat into the entrance of the nozzle as a valve seat, with the stopper rod constructed in hollow form with a centrally disposed passage extending axially therethrough for ] feeding the wire completely through the stopper to the bottom of the ladle. The treating agent is protected from excessive heat by cooling it by means of a special stopper rod construction, in which means are provided for circulating cool air in surrounding relation to the treating agent within the stopper rod, and the rod itself is constructed of an insulating outer wall.

235421

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