立式板坯连铸机结晶器内液面波动的物理模拟

Physical Modeling of Fluctuation of Liquid Level in Mold of Vertical Slab Concaster

为优化200mm×1300mm立式板坯连铸结晶器浸入式水口，采用1：1水模型模拟研究水口结构参数（侧孔断面．40mm×80mm，40mm×40mm和侧孔角度＋15°和-15°）以及工艺参数（浸入深度-100～130mm，拉速0．45～0．65m／min）对液面波动的影响。结果表明：水口结构参数对液面波动的影响较明显；侧孔断面40mm×40mm，侧孔角度＋15°的2#水口的使用性能相对较好；浸入深度对液面波动量的影响不大；拉速对液面波动的影响与水口结构有关，对拉速变化的敏感程度由大到小的次序是2#水口（40mm×40mm，＋15°），4#水口（40mm×40mm，-15°），3#水口（40mm×80mm，-15°），1#水口（40mm×80mm，＋15°）。

In order to optimize the submerged entry nozzle （SEN） for 200 mm ×1 300 mm vertical slab casting mold, the effect of parameters of nozzle structure （cross section dimension of side port- 40 mm ×40 mm and 40 mm ×80 mm, and angle of port- ＋ 15° and - 15° ） and process parameters （ submerged depth 100 - 130 nun and casting speed 0. 45 - 0. 65 m/rain） on fluctuation of liquid level has been simulated and studied by 1 ： 1 water model. Results show that the effect of nozzle structure parameters on fluctuation of liquid level is more obvious and the structure of 2# nozzle with side port dimension 40 mm ×40 mm and angle of port ＋ 15 ° has better service performance; the effect of submerged depth on fluctuation of liquid level isn＇ t appreciable ; and the effect of casting speed on fluctuation of liquid level relates to nozzle structure, and the descending order of sensitivity of nozzle structure to casting speed is nozzle 2# （40 mm ×40 mm, ＋ 15° ）, nozzle 4# （40 mm×40 mm, -15°）, nozzle 3#（40 mm ×80mm, -15°） and nozzle 1#（40 mm ×80 mm, ＋ 15°）.