40t钢包浇铸过程的数学模拟研究

Mathematical simulation study on steel casting process from a 40 t ladle

利用CFD商业软件,对建立在正交网格上的40t钢包浇铸过程进行了数值模拟,模拟结果得出了钢包静置和钢包浇铸的钢水流动规律。研究发现:钢包静置时,温度梯度会逐渐变大,钢液呈自上而下的循环流,流速会逐渐变小,在浇铸前可在临界吹气量下喷吹惰性气体3min以消除温度梯度;钢包浇铸时,钢液呈自下而上的循环流,根据临界高度的模拟结果可拟合出一条直线,对实际生产中临界高度的确定具有一定的参考价值。

Using the commercial software pack of CFD, simulation of casting process from a 40t ladle is carried out and the law of liquid steel flow in the ladle in stand still as well as in the ladle in casting is determined. Results of research show that when the ladle is in a state of stand still the temperature gradient goes up gradually and the liquid steel flows cyclically downwards and the flow rate slows down gradually and prior to casting inertia gas has to be blown into the ladle at a critical blow rate for 3 minutes in order to eliminate the temperature gradient; and in the process of casting the liquid steel in the ladle flows cyclically upwards. According to the simulation of the critical height a straight line can be drawn up and this line can be used as a referrence for determination of the real critical height in the practical production.