| 摘要 |
PROBLEM TO BE SOLVED: To prevent an injection pipe body from breakage and detachment during using the pipe so as to use the injection pipe many times by forming a light-weight castable layer on the inner surface of the injection pipe composed of a refractory. SOLUTION: In this tundish injection pipe, a light-weight castable layer 2 is formed on an inner surface of an injection pipe body 1 composed of refractory. While the tundish injection pipe is being used, a base metal adhered at more than a specific thickness (weight) is peeled off together with a light-weight castable of required thickness. Also, during usage, the adhered base metal can be easily removed together with the light weight castable of required thickness. Furthermore, the inner face of the injection pipe body is formed into a taper in a way that the diameter is gradually expanded from the upper part to the lower part, so as to facilitate peeling-off of the adhered base metal during usage and removal of the adhered base metal after usage. In this case, it is preferable that an angleθof the taper is 1-7 deg..
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