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通过水模试验对邯郸钢铁集团有限责任公司邯宝炼钢厂连铸结晶器液面波动原因进行分析。结果表明,随着板坯连铸机拉速提高、吹氩量增加、铸坯断面的增加,结晶器钢液面波动量增大;随着浸入式水口浸入深度增加和水口出口角度增大,结晶器内钢液面波动量减小。选择合适的拉速、恒速浇铸、优化浸入式水口形式和浸入深度、保持适当的吹氩量、执行标准化操作,可以降低结晶器钢液面波动量,提高连铸坯质量。采取优化措施后,结晶器钢液面波动量逐渐恢复到±3 mm以内,热轧卷板边部翘皮和夹杂缺陷比例逐月降低,缺陷率从2010年11月0.41%控制到2011年4月以后0.1%以下。
The water level test was used to analyze the reason of liquid level fluctuation in continuous casting mold of Handan Iron and Steel Group Co., Ltd. in Handan Iron and Steel Group Co., Ltd. The results show that as the casting speed increases and the argon blowing rate increases, the fluctuation of liquid surface of the mold steel increases with the increase of the section of slab. With the increase of immersion depth and the outlet angle, Mold liquid steel surface wave volume decreases. Select proper pulling speed, constant speed casting, optimizing submerged entry nozzle form and depth of immersion, maintaining proper argon blowing capacity, and implementing standard operation can reduce the fluctuation of liquid level in mold steel and improve the quality of continuous casting slab. After taking the optimization measures, the fluctuation of liquid level of mold steel gradually recovered to within ± 3 mm, and the proportion of warp and inclusion defects on the edge of hot rolled coil decreased month by month. The defect rate was controlled from 0.41% in November 2010 to 4 Less than 0.1% after month.