材料期刊网

根据某钢厂实际连铸中间包的操作工艺参数，采用数值模拟的手段研究了中间包内钢液的流动模式，通过模拟中间包内钢液瞬态流动，来获取RTD-C曲线，进而计算关键参数值（活塞区体积分数，死区体积分数等）。运用正交试验设计分析了影响中间包内钢液流动的几种因素。合理的堰坝组合能够改善中间包内钢液流动状况，促进夹杂物上浮，降低死区体积分数。试验研究结果表明：控流装置的应用能很好地改善中间包内钢液流动；其中9#堰坝组合方案的中间包内钢液流动模式较合理，死区体积分数明显下降，钢液混合更为均匀。

According to the structure and the operating parameters of tunish at a steel plant, the molten steel flow behaviour in tunish has been investigated by numerical simulation. RTD-C-Curves(Residual Time Distribution) were gained by computing transient flow in tunish. At the end of each experiment, the computer computed the values of key parameters(e.g. Plug Volume %, Dead Volume % etc) from C-Curve.The influences of the flow modifier on the fluid flow in tunish during continuous casting of the slab were studied through orthogonal tests. The flow modifiers with rational design could improve the behaviour of the fluid flow in tunish, accelerate inclusions floating, decrease volume fraction of the dead flow. The result of simulations showed that the flow modifiers could improve the flow behaviour of molten steel in tunish; the flow field with the 9# flow modifier was more rational, the volume fraction of the dead flow decreased obviously, molten steel mixed more even.