| 摘要 |
PURPOSE:To prevent the development of defect in a wide cast strip by making a nozzle flat shape, forming a slit facing to diagonally upward to molten metal discharging hole and further, if necessary, arranging a nozzle electric heating device and middle nozzle. CONSTITUTION:Pouring basin 4 is formed with cooling drums 3 and side weirs, etc., and in this, the pouring nozzle 2 is arranged as submerging from a tundish 1. Then, the nozzle 2 is made to flat-shape and also the slit 12 facing to diagonal upward is formed to the molten metal discharging part. Further, if necessary, the directly electric heating device providing water cooled electrode and the middle nozzle 9 are arranged, to execute prevention of the nozzle 2 from clogging and diffusion of the molten metal. By this method, as uniform molten metal discharging flow having wide width is obtd. through the nozzle 2, the development of defect in the wide cast strip is prevented. |
