Numerical simulation and industrial test of single flow slab induction heating tundish with double channel
A three-dimensional unsteady mathematical model was established to study the flow,heat transfer and in-clusion removal behavior in induction heating tundish by numerical simulation and industrial test,taking single flow slab induction heating tundish with double channel in an iron and steel enterprise as the prototype.The results show that when the heating power is 400 kW,the liquid steel flows through the channel at high speed,the temperature ri-ses from 1 846 K to 1 862 K,with a warming range of 16 K.After exiting the channel,it flows upward under the action of buoyancy,and then flows to the bottom after reaching the top of the pouring zone.As the heating power increases,the temperature rise of the liquid steel flowing through the channel gradually increases.The temperature of liquid steel outflowing the channel is higher than the average temperature of liquid steel in the pouring zone.The temperature of pouring zone increases gradually.For inclusions with 50 μm diameter and 400 kW heating power,the removal rate of inclusions in induction heating tundish is higher than that without induction heating,and the removal rate increases by 19.01 percent point.The removal rate of inclusions in the channel is also higher than that without induction heating,and the removal rate increases by 31.41 percent point.For each size of inclusions,the removal rate with induction heating is higher than that without induction heating.The heating power increases from 400 kW to 500 kW,the removal rate of inclusions increases slightly.A similar conclusion can be obtained when all sizes of inclusions are released simultaneously from the inlet.In industrial test,with the increase of heating pow-er,the temperature at the tundish outlet increases.When the heating power is 400 kW,the total oxygen mass fraction of the sample is 15.3 percent point lower than that without induction heating.When the heating power is 500 kW,the total oxygen mass fraction of the sample is 17.3 percent point lower than that without induction heating.With the increase of heating power,inclusion removal rates increase continuously.This study can pro-vide some theoretical guidance for the industrial application of single flow slab induction heating tundish with double channel.
NETL
NSTL
万方数据
