发明名称 |
Lance for stirring molten metal and method of making the same |
摘要 |
For a molten metal stirring lance a steel tubular member is coated interiorly with wax, for instance, and a refractory material plug is cast in the member. The plug extends from one end of the member and leaves a clear space near the other end. Melting the wax out leaves a thin gas passageway gap around the plug. The end having the clear space is capped and connected to a gas feed pipe which is surrounded by a stiffener member. The latter member is convered with a refractory material protective sheath. The refractory material in the tubular member erodes or ablates by a small amount during each use in molten metal to keep the gas discharge gap clear.
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申请公布号 |
US4667385(A) |
申请公布日期 |
1987.05.26 |
申请号 |
US19850768854 |
申请日期 |
1985.08.23 |
申请人 |
MIDWEST INSTRUMENT CO., INC. |
发明人 |
COLZANI, JAMES W.;KEHL, NELSON H. |
分类号 |
C21C7/072;C22B9/05;F27D27/00;(IPC1-7):C21C5/48 |
主分类号 |
C21C7/072 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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