公开(公告)号：EP1077266A3

公开(公告)日：2002-11-13

申请号：EP00115729.6

申请日：2000-07-21

申请人： TOKYO YOGYO KABUSHIKI KAISHA

发明人： Aramaki, Keizo, c/o Tokyo Yogyo K.K. ,  Yoshida, Tsuyoshi, c/o Tokyo Yogyo K.K.

IPC分类号： C21C7/072 ,  B22D1/00 ,  C21C5/48

CPC分类号： B22D1/005 ,  C21C5/48 ,  C21C7/00

摘要： There are provided a gas blowing plug with a long life and a manufacturing method therefor. The gas blowing plug for blowing gas from the bottom of a molten metal vessel comprises a slit-shaped gas passage ranging from the bottom to the top of the plug. The gas passage is formed by a continuous or discontinuous slit-shaped gas passage in the horizontal cross section of the plug, and is formed by a slit-shaped gas passage continuous from the bottom to the top of the plug and a discontinuous slit-shaped gas passage in the vertical cross section of the plug. The cross-sectional shape of a tubular body can be a star shape, for example.