摘要
针对某钢厂SPHE卷板质量异议中夹渣缺陷问题,采用模拟手段分析了因结晶器偏流导致的卷渣漏钢现象的严重程度,并据此对炼钢连铸工序进行了相应的工艺调整。模拟分析结果表明,当浸入式水口对中不良、水口结瘤及塞棒端头或碗部局部结瘤等情况出现时都会出现结晶器流场和液面速度的不对称。在水口不对称度为5%时,水口附近出现较大漩涡。根据模拟分析结果在采取相应工艺措施后,SPHE钢连铸漏钢事故发生率得到完全控制,SPHE卷板皮下夹渣现象也得以有效控制。
Severity of the breakout due to the bias current of the slag entrapment had been analyzed by meams of simulation according to SPHE roiled plate with inclusion defects in quality in a certain steel plant. And the corresponding adjustment process for the steelmaking and continuous casting process had also been conducted. Simulation results showed that the SEN off the center, nozzle blockage or the stopper flow control area blockage, could lead to asymmetry between mold flow field and liquid surface velocity. When the nozzle asymmetry degree was 5%, a lager vortex would appear near the nozzle. After taking the corresponding technological measures, SPHE steel leakage accidents had been gotten fully control, and the hypodermic inclusion in the SPHE roiled plate also been controlled effectively.
出处
《冶金设备》
2015年第1期29-32,共4页
Metallurgical Equipment
关键词
偏流
卷渣
板坯结晶器
数值模拟
物理模拟
Bias current Slag entrapment Slab mold Numerical simulation Physical simulation
