公开(公告)号：US4674101A

公开(公告)日：1987-06-16

申请号：US782525

申请日：1985-10-01

申请人： Kazuhiko Matsuo ,  Teruyuki Hasegawa ,  Seigo Kuwano ,  Ryuji Yamaguchi ,  Akio Shiwata ,  Yoneichi Hamada ,  Yoshimi Komatsu ,  Tsuneo Kondo ,  Yusuke Shirotani ,  Hirohisa Nakashima ,  Yasuhiro Matsuda

发明人： Kazuhiko Matsuo ,  Teruyuki Hasegawa ,  Seigo Kuwano ,  Ryuji Yamaguchi ,  Akio Shiwata ,  Yoneichi Hamada ,  Yoshimi Komatsu ,  Tsuneo Kondo ,  Yusuke Shirotani ,  Hirohisa Nakashima ,  Yasuhiro Matsuda

IPC分类号： C21C5/52 ,  C21C7/00 ,  F27B3/10 ,  F27D17/00 ,  H05B7/12 ,  H05B7/10

CPC分类号： H05B7/12 ,  C21C5/52 ,  C21C7/0075 ,  F27B3/10 ,  F27D17/003 ,  Y02P10/216

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.

摘要翻译： 形成在钢包的覆盖物中的插入孔与通过插入孔插入的电极之间的间隙由密封装置密封。 密封装置具有纵向和可滑动地装配在电极上的帽密封件。 基座密封件以这样的方式气密地设置在盖密封件和覆盖物之间，使得在电极和基座密封件之间设置间隙。 底部密封件具有用于将气体朝向电极排出的气体喷射喷嘴和用于向下排放气体的另一气体喷射喷嘴。 使用基座和盖子密封件可以确保其密封功能，尽管电极的任何移动，从而防止[N]的拾取以及钢水的再氧化。 当气体密封通过形成围绕电极围绕其轴线旋转的气体的流动而实现时，可以进一步提高密封性能。 此外，当通过使冷却水循环通过其来冷却基座密封件时，其耐久性也可以提高。

公开(公告)号：US4650517A

公开(公告)日：1987-03-17

申请号：US868807

申请日：1986-05-29

申请人： Teruyuki Hasegawa ,  Seigo Kuwano ,  Ryuji Yamaguchi ,  Kazuhiko Matsuo

发明人： Teruyuki Hasegawa ,  Seigo Kuwano ,  Ryuji Yamaguchi ,  Kazuhiko Matsuo

IPC分类号： C21C5/52 ,  C21C7/00 ,  C21C7/072 ,  C22B4/00

CPC分类号： C21C5/52 ,  C21C7/0075 ,  C21C7/072 ,  C21C7/0056 ,  Y02P10/216

摘要： Three electrodes are dipped into slag on molten steel in a ladle. The electrodes are connected to a three-phase AC voltage. An arc is formed between each electrode and molten steel upon energizing the electrodes. The molten steel is heated by arc heat. Each electrode has a gas flow path extending longitudinally along its center. The gas flow path is open at the lower end of each electrode to constitute a gas injection port. Ar gas is injected from the gas injection port through the gas flow path. Nitrogen is removed from the arc region between the electrodes and the molten steel and its peripheral region to prevent the nitrogen pickup phenomenon of molten steel. If a powder mixture of chromium ore and carbon is added to the Ar gas, chromium ore is reduced by carbon with arc heat to add reaction product of chromium to the molten steel. If a flux powder is added to the Ar gas, the flux is melted and slagged by the arc heat.

摘要翻译： 三个电极浸入钢包中的钢水中的炉渣中。 电极连接到三相交流电压。 在对电极通电时，在每个电极和钢水之间形成电弧。 钢水通过电弧加热。 每个电极具有沿其中心纵向延伸的气体流路。 气体流路在每个电极的下端开口以构成气体注入口。 从气体注入口通过气体流动路径注入Ar气体。 从电极和钢水及其周边区域之间的电弧区域去除氮气，以防止钢水的氮吸收现象。 如果将铬矿石和碳的粉末混合物加入到Ar气中，则铬矿用电弧加热还原，以加入铬与钢水的反应产物。 如果向Ar气中加入焊剂粉末，则焊剂熔化并通过电弧加热排渣。