Based on a numerical analysis of the alternating electromagnetic field in the process of Steel refining with an induction ladle furnace (ILF), the optimization of the structure of ILF and the electromagnetic field for...Based on a numerical analysis of the alternating electromagnetic field in the process of Steel refining with an induction ladle furnace (ILF), the optimization of the structure of ILF and the electromagnetic field for melting is realized in the present work. The optimization of the ILF by outward extension of inner yokes can decrease the magnitic flux leakage obviously, reduce the eddy current energy loss dramatically and then, decrease the total power consumption.展开更多
Steel teeming time is a very important parameter in the new slide gate system with electromagnetic induction （called electromagnetic steel teeming system）, and how to shorten this time is a key to realize applicatio...Steel teeming time is a very important parameter in the new slide gate system with electromagnetic induction （called electromagnetic steel teeming system）, and how to shorten this time is a key to realize application of the new system in continuous casting. The effects of power parameters, coil position, nozzle material and other factors on the steel teeming time were investigated by a self-designed electromagnetic steel teeming system in detail. The experimental results show that the relationship between power and steel teeming time is nonlinear. The coil position has great in- fluence on steel teeming time. And the upper nozzle with high permeability can reduce the teeming time. In addition, the steel teeming time becomes minimum when the size of the spherical cast iron particles is 2.0 ram. This research can provide technical references for the industrial application of the new electromagnetic steel teeming system.展开更多
A new method was presented to inhibit bulging deformation and fluctuation of free surface by magnetic pressure.A research combined with numerical and experimental methods was conducted to investigate the feasibility a...A new method was presented to inhibit bulging deformation and fluctuation of free surface by magnetic pressure.A research combined with numerical and experimental methods was conducted to investigate the feasibility and inhibition efficiency.The parameters including magnetic flux density,frequency and action area of magnetic pressure were analyzed.The results show that the method is feasible,and the bulged free surface is fully inhibited by the proper magnetic pressure.The inhibition efficiency increases as the increase in magnetic flux density and frequency,which shows a linear rela-tionship with the magnetic flux density.The frequency has a great influence on the inhibition efficiency when the frequency is changed from 0.15 to 5.00 kHz.However,the frequency more than 5.00 kHz has little influence on the inhibition efficiency and is recommended in application process.When the ratio of the action area to the area of bulged free surface is 0.8,the best inhibition is achieved.However,when the ratio is more than 1.2,a distinct W-shaped free surface is observed.The surficial and internal flow is strengthened with proper magnetic pressure imposed.Moreover,under the action of magnetic pressure,the fluctuation amplitude of free surface decreases from 4.0 to 1.2 mm and the main fluctuation with frequency of 2.34 Hz is dispersed into several minor fluctuations with frequency of 0.4-4.3 Hz.展开更多
文摘Based on a numerical analysis of the alternating electromagnetic field in the process of Steel refining with an induction ladle furnace (ILF), the optimization of the structure of ILF and the electromagnetic field for melting is realized in the present work. The optimization of the ILF by outward extension of inner yokes can decrease the magnitic flux leakage obviously, reduce the eddy current energy loss dramatically and then, decrease the total power consumption.
基金Sponsored by Science and Techonlogy Program of Liaoning Province of China(2008221015)
文摘Steel teeming time is a very important parameter in the new slide gate system with electromagnetic induction （called electromagnetic steel teeming system）, and how to shorten this time is a key to realize application of the new system in continuous casting. The effects of power parameters, coil position, nozzle material and other factors on the steel teeming time were investigated by a self-designed electromagnetic steel teeming system in detail. The experimental results show that the relationship between power and steel teeming time is nonlinear. The coil position has great in- fluence on steel teeming time. And the upper nozzle with high permeability can reduce the teeming time. In addition, the steel teeming time becomes minimum when the size of the spherical cast iron particles is 2.0 ram. This research can provide technical references for the industrial application of the new electromagnetic steel teeming system.
基金National Natural Science Foundation of China(Nos.51474065 and 51574083)the 111 Project(2.0)of China(No.BP0719037).
文摘A new method was presented to inhibit bulging deformation and fluctuation of free surface by magnetic pressure.A research combined with numerical and experimental methods was conducted to investigate the feasibility and inhibition efficiency.The parameters including magnetic flux density,frequency and action area of magnetic pressure were analyzed.The results show that the method is feasible,and the bulged free surface is fully inhibited by the proper magnetic pressure.The inhibition efficiency increases as the increase in magnetic flux density and frequency,which shows a linear rela-tionship with the magnetic flux density.The frequency has a great influence on the inhibition efficiency when the frequency is changed from 0.15 to 5.00 kHz.However,the frequency more than 5.00 kHz has little influence on the inhibition efficiency and is recommended in application process.When the ratio of the action area to the area of bulged free surface is 0.8,the best inhibition is achieved.However,when the ratio is more than 1.2,a distinct W-shaped free surface is observed.The surficial and internal flow is strengthened with proper magnetic pressure imposed.Moreover,under the action of magnetic pressure,the fluctuation amplitude of free surface decreases from 4.0 to 1.2 mm and the main fluctuation with frequency of 2.34 Hz is dispersed into several minor fluctuations with frequency of 0.4-4.3 Hz.
