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通过建立的6:10几何相似比的模拟180mm×700 mm板坯结晶器的水模型(108 mm×420mm),使用数字图像处理技术,分析了水量2.54~3.16 m~3/h,气量0.037~0.110 m~3/h,滑板开口度51%~100%,水口浸入深度78~108 mm等参数对水口吹氩板坯结晶器水模型内宽面含气率分布的影响。结果表明,当水量3.16 m~3/h(相当于原型1.50m~3/h),气量0.037 m~3/h(原型0.120 m3/h),水口底部形状为凹形,滑板开口度51%,水口浸入深度78 mm(原型130 mm)时,水模型内气泡分布相对均匀,有利于流场的改善和夹杂的上浮去除。180 mm×700mm铸坯的生产性试验表明,采用优化的参数生产的超低碳钢连铸坯中≥30μm的夹杂物量和夹杂物总量均显著降低。
The water model (108 mm × 420 mm) was simulated by the established 6:10 geometrical similarity ratio and the water volume was 2.54 ~ 3.16 m ~ 3 / h and the gas volume was 0.037 ~ 0.110 m ~ 3 / h, 51% ~ 100% sliding plate opening, 78 ~ 108 mm inlet depth and other parameters. The results show that when the water volume is 3.16 m 3 / h (equivalent to 1.50 m 3 / h for the prototype) and the gas volume is 0.037 m 3 / h (0.120 m 3 / h for the prototype), the bottom of the nozzle is concave and the opening of the slider is 51% , And the depth of water inlet is 78 mm (prototype 130 mm), the bubble distribution in the water model is relatively uniform, which is beneficial to the improvement of flow field and inclusion floating removal. Productivity tests on a 180 mm × 700 mm billet showed significantly lower inclusions and inclusions ≥30 μm in the ultra-low carbon steel billet produced with the optimized parameters.