| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress embrittlement of a ZG in the vicinity facing a hollow chamber, in an immersion nozzle wherein the hollow chamber that is a gas passage path is set inside a body refractory and wherein the ZG is disposed on the periphery side contacting with the hollow chamber. <P>SOLUTION: This immersion nozzle includes: an inner hole body 2 such that the inner hole body 2 faces an inner hole 1; and a close layer 7 made of a CaO-Al<SB POS="POST">2</SB>O<SB POS="POST">3</SB>substance in an area 5 made of the ZG corresponding to a powder line of a mold of a peripheral side wall face of the hollow chamber 3 on the peripheral side of the inner hole body 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
