| 摘要 |
The present invention relates to a slag dart which can maximize a connection force between a head and a stem of the slag dart for closing an exit of a revolving furnace, when a discharging process of molten steel ends, in order to separate the molten steel from slag in the revolving furnace and can enhance productivity in a manufacturing process. The slag dart includes a stem which has a male screw bar formed integrally with an upper part of a steel core, a refractory sleeve molded and fixed on the outer part of the steel core, and a washer fixed to an upper part of the refractory sleeve; and a head having a weight member with a connection hole in the center and being formed into a refractory by inserting the weight member in order to have a lower dented hole communicating with the connection hole, wherein a washer of the stem and the refractory sleeve are press-fit into the lower dented hole of the head. The slag dart further includes an upper dented hole formed at an upper part of the connection hole of the head to be communicated with the connection hole; a male screw bar which passes through the connection hole, protrudes above the head, and is screw-coupled to a nut located inside the upper dented hole to fix the male screw bar; and a refractory partition wall formed between the upper dented hole of the head and the upper side of the weight member. |
