| The iron and steel industry has always been essential to the fast-paced development of economic construction.Market demand is essential because it is the most important component of the industrial base and urban construction.Low-cost,highefficiency clean steel production technology has emerged as a critical core integrated technology and development direction for the iron and steel metallurgy industry in the twenty-first century.This topic examines the distribution of magnetic induction intensity,electromagnetic force,current density,and Joule heat in different induction heating tundish models under different power conditions using the finite element analysis method.To calculate and analyze the heat flow field of the double-pass,double-flow tundish with the same powers,the electromagnetic force and joule heat are introduced into the momentum and energy equations.The distribution characteristics of shear stress in different power and tundish models were discussed in light of the erosion effect of wall shear stress on refractory lining.The optimal operating process parameters were evaluated and selected based on the idea of a balance mechanism and high heating efficiency,and the spatial distribution of multiple physical fields was predicted,yielding the following conclusions:(1)There is a linear relationship between the ratio of magnetic induction intensity and power under different induction heating power(400k W,600 k W,and 800 k W),as well as a linear relationship between the electromagnetic force,current density,and joule heat and power.When the heating power is 600 k W,which is preferred in the simulation of the temperature field and flow field,the heating efficiency is higher when all four points are taken into account.(2)Due to the speed,a portion of the liquid steel will directly impact the wall surface and the free liquid surface in the absence of induction heating,and the maximum flow rate of the liquid steel in the channel is 0.13 m/s.In the presence of induction heating,the liquid steel rotates under the action of electromagnetic force and pinches,extending its flow path until it reaches the distribution chamber.The liquid steel in the channel has a maximum velocity of 0.45 m/s.(3)When no induction heating is used,the temperature of the tundish at the outlet drops by 5-6K,and when an induction heating heat source is used,the temperature rise at the outlet of the original double-channel induction heating tundish,the doublechannel induction heating tundish with double iron core coils,the double-coil induction heating tundish with large iron core and the induction heating tundish with single wire coils is all around 20 K,and the temperature can be well compensated,thus reducing the temperature gradient of the liquid steel in the receiving chamber and the discharging chamber.(4)The shear stress of the tundish without induction heating directly hits the bottom wall under the inlet,resulting in the maximum stress value directly below;the shear stress of the tundish with induction heating varies with the arrangement of the core coil.And as the power increases,so does the shear stress on the channel wall.(5)It is preferable to evaluate the efficiency of an induction-heating tundish with a large core and a double coil from four perspectives.The flow field and temperature field are investigated,and the findings show that the induction heating effect of a large core and double coil is superior.When the shear stress in the channel is compared to the reduction of the lining’s erosion,it is clear that the induction heating tundish with a large core and double coil is superior.The induction heating tundish with a large iron core and double coil layout has the best overall effect based on the comprehensive analysis of the four factors listed above. |
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