【摘要】 使用数值模拟方法研究了拉速0.9m/min时,水口倾角-7°~-11°对220 mm×1600 mm板坯结晶器内坯壳厚度、坯壳温度和自由液面流动的影响。模拟和应用结果得出,以拉速0.8 m/min,水口倾角-15°工艺下钢液流动为标准,通过对比计算结果与标准工艺曲线,确定在0.9 m/min拉速时,水口倾角为-11°为最佳工艺方案。生产应用结果表明,采用优化工艺后结晶器窄面报警频率由原15次/月降至0次/月,铸坯表面质量也有一定改善。更多还原

【Abstract】 The effect of inclination of submerged nozzle -7°~-11° with casting speed 0. 9 m/min on shell thickness, shell temperature and free surface flow in mold for 220 mm × 1600 mm slab has been studied by numerical simulation method. The simulation and application results show that taking liquid steel flow with casting speed 0. 8 m/min and inclination of nozzle-15° as criterion and compared calculation results with criterion process curves the optimizing process scheme is nozzle inclination -11° with casting speed 0. 9 m/min. Commercial production application results show that after using the optimization process the mold norrow face alarm rate of recurrence per month from 15 times to 0 time and the quality of cast slab surface has definite improvement.更多还原