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前言第二炼钢厂由西德引进的三台1600毫米板坯连铸机,自1978年运转以来,生产情况基本良好。为了进一步减少铸坯中夹杂含量,不断提高成品质量,作为技术措施之一,我厂试图对西德进口的上径为60毫米,下径和侧孔径为55毫米,侧孔与水平方向夹角为35°的倒“y”型浸入式水口(见图1)在结构尺寸上加以适当的改进,使由侧孔流出的钢液在结晶器中形成的流场,利于夹杂上浮而为结晶器液面的保护渣层所吸附。为此,在武汉水利电力学院的协助下,我们于1980年10～12月进行了连铸浸入式水口的水力模型试验。模型试验使用了170×700～250×1600
Foreword The second steel mill imported from West Germany, three 1600 mm slab caster, running since 1978, the production situation is basically good. In order to further reduce the content of inclusions in the slab, and continuously improve the quality of finished products, as one of the technical measures, our factory tried to import the upper diameter of West Germany to 60 mm, the diameter of the lower side and the side of the hole to 55 mm, the angle between the side hole and the horizontal direction 35 ° inverted “y” type immersion nozzle (see Figure 1) in the structural dimensions to be properly improved so that the liquid flow from the side hole flow in the mold formed in the flow field is conducive to the inclusion floating up for the mold The level of the protective slag layer adsorption. To this end, with the assistance of Wuhan Institute of Water Conservancy and Electric Power, we conducted a hydraulic model test of the continuous casting submerged entry nozzle from October to December 1980. The model test used 170 × 700 ~ 250 × 1600