发明名称 Arc-heating type extra-furnace refining apparatus
摘要 The gap between an insertion hole formed in a covering of a ladle and an electrode inserted through the insertion hole is sealed by sealing means. The sealing means has a cap seal longitudinally and slidably fitted over the electrode. A base seal is hermetically disposed between the cap seal and the covering in such a manner that a gap is provided between the electrode and the base seal. The base seal has a gas injection nozzle intended to discharge a gas toward the electrode and another gas injection nozzle intended to discharge the gas downwardly. The use of the base and cap seals enables securing the sealing functions thereof despite any movement of the electrode, thus preventing the pickup of [N] as well as the reoxidation of molten steel. When a gas seal is effected by the formation of a flow of gas rotating around the electrode about the axis thereof, the sealing performance can be more enhanced. Further, when the base seal is cooled by causing cooling water to be circulated therethrough, its durability can also be enhanced.
申请公布号 US4674101(A) 申请公布日期 1987.06.16
申请号 US19850782525 申请日期 1985.10.01
申请人 NIPPON KOKAN KABUSHIKI KAISHA 发明人 MATSUO, KAZUHIKO;HASEGAWA, TERUYUKI;KUWANO, SEIGO;YAMAGUCHI, RYUJI;SHIWATA, AKIO;HAMADA, YONEICHI;KOMATSU, YOSHIMI;KONDO, TSUNEO;SHIROTANI, YUSUKE;NAKASHIMA, HIROHISA;MATSUDA, YASUHIRO
分类号 C21C5/52;C21C7/00;F27B3/10;F27D17/00;H05B7/12;(IPC1-7):H05B7/10 主分类号 C21C5/52
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