抚顺钢厂引进的6t真空感应炉原设计中间漏斗只1个，而且其中只设1道“挡渣坝”。它的挡渣效果很差，只起到挡50％渣子的作用，并且根本起不到挡氧化股的作用。笔者等设计了两个中间漏斗，每个设一道“挡渣坝”。把挡渣坝悬空高度降低到最大限度（即钢水流经坝底高度的最高限） Fushun introduced 6t vacuum induction furnace original design of the middle of the funnel only one, but only one channel “slag dam.” Its slag blocking effect is very poor, only play a role in blocking 50% of the slag, and basically failed to stop the role of oxidation unit. The author designed two intermediate funnels, each set a “slag dam.” The dredging dam dangling height is reduced to the maximum (that is, the maximum height of molten steel through the dam bottom)