US PATENT SUBCLASS 266 / 224
.~.~.~.~ Having tuyere formed in plug bottom

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

200  DF  MEANS FOR MELTING OR VAPORIZING METAL OR TREATING LIQUEFIED METAL {19}
216  DF  .~ By means introducing treating material {1}
217  DF  .~.~ Gaseous treating material {2}
218  DF  .~.~.~ Having fluid inlet formed in vessel wall, e.g., tuyere {5}
224.~.~.~.~ Having tuyere formed in plug bottom

DEFINITION

Classification: 266/224

(under subclass 218) Device wherein the treating vessel is provided with a separate, distinct bottom closure which has an integrally formed tuyere therein.

(1) Note. The plug bottoms are usually removable or replaceable to facilitate changing of worn or damaged tuyeres.