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采用1:2比例水模型进行物理模拟实验,研究了230mm×(1030,1270,1520,1650)mm宽度的板坯连铸结晶器的流场,优化浸入式水口结构。结果表明,在钢通量一定的情况下,随着结晶器断面宽度的不断增大,同一水口的流股冲击深度增大,整个液面活跃程度逐渐降低,导致液面偏死。可以通过改变水口的比面积,侧孔倾角,高宽比等水口结构参数来适应不同宽度的板坯结晶器连铸工艺要求。
A 1: 2 ratio water model was used to carry out physical simulation experiments. The flow field of slab continuous casting mold with a width of 230 mm × (1030, 1270, 1520 and 1650 mm) was studied, and the structure of submerged entry nozzle was optimized. The results show that with the increase of crystallite cross section width, the impact depth of the same nozzle increases with the constant flux of steel, and the level of activity in the whole surface decreases gradually, which leads to the liquid level being dead. By changing the nozzle area, side hole inclination, aspect ratio of the nozzle structure parameters to adapt to different width slab mold continuous casting process requirements.