美国内陆钢公司第二转炉车间的2号板坯连铸机浇厚235 mm,宽889～1930 mm板坯。铸机最大注速为1.76 m/min,所用钢包容量为195 t,中间包最大容量为33.9 t。以前钢包用长水口为直筒形,在更换钢包时,打开新换钢包水口前,钢包需一直下降到水口头部略高于中间包钢水液面为止。长水口一打开,水口头部就浸入到中间包钢水中,在水口内部形成负压,从而使钢水“倒灌”入水口中,不 The No. 2 slab caster at Inland Steel’s second converter plant is 235 mm thick and 889 to 1930 mm wide slabs. Casting machine has a maximum injection speed of 1.76 m / min, a ladle capacity of 195 t and a maximum tundish capacity of 33.9 t. In the past, the ladle was of a straight shape with a long nozzle. When the ladle was replaced, the ladle should be lowered until the head of the lance was slightly above the level of molten steel in the tundish before opening the new ladle nozzle. As soon as the shroud opens, the water head dips into the tundish and creates a negative pressure inside the nozzle so that the molten steel “reacts” into the water inlet