李宝宽
长期从事金属精炼和连铸过程的模型化研究工作，将现代流体力学理论和方法应用于金属生产的实际工艺过程。
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 姓名：李宝宽
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博士生导师
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学科领域：
工程热物理
 研究兴趣：长期从事金属精炼和连铸过程的模型化研究工作，将现代流体力学理论和方法应用于金属生产的实际工艺过程。
李宝宽 男，辽宁辽阳人，1963年8月生。1992年于东北大学热能工程系取得博士学位。1994年任东北大学热能工程系副教授，2000年晋升教授。其间从1998年到2000年在日本东京大学大学院新领域创成科学研究科做博士后研究。多次访问日本、美国、欧洲和韩国进行合作研究和出席学术会议。长期从事金属精炼和连铸过程的模型化研究工作，将现代流体力学理论和方法应用于金属生产的实际工艺过程。完全独立地开发了三维非稳态冶金传输过程模拟软件，能够处理复杂的几何区域和气液两相流体流动问题，并包括解决电磁流体流动问题的能力。针对钢的精炼工艺，提出利用电磁驱动旋流结合氩气喷吹方法提高纯净钢的精炼效率；在板坯连铸工艺中，阐明液面涡流生成机理和对铸坯质量的影响。在美国TMS学会主办的Metallurgical and Materials Transaction B和日本铁钢学会主办的ISIJ International及国内《金属学报》等重要杂志上发表80余篇论文。其中被SCI和EI检索50余篇次。出版《炼钢中的计算流体力学》和《现代流体力学的冶金应用》两部专著。作为负责人主持三项国家自然科学基金项目， 此外还承担辽宁省攻关和辽宁省基金及教育部等十余项国家项目。曾获得辽宁省自然科学三等奖和冶金科学技术奖。

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李宝宽， BAOKUAN LI， TOSHIMITSU OKANE， and TAKATERU UMEDA
METALLURGICAL AND MATERIALS TRANSACTIONS B VOLUME 32B, DECEMBER 20011053，0001，（）：
1年11月30日
Biased flow occurs frequently in the slab continuous casting process and leads to downgraded steel quality. A mathematical model has been developed to analyze the threedimensional biased flow phenomena associated with the effects of static magneticfield application and argon gas injection in the slab continuous casting process. By moving the submerged entry nozzle (SEN) from center to offcenter, the biased flow and vortexing flow in the mold can be reproduced in the numerical simulation. The existence of a vortexing flow is shown to result from threedimensional biased flow in the mold. A vortex is located at the lowvelocity side adjacent to the SEN. The vortex strength depends on the local horizontal velocity of molten steel and decreases gradually with distance from the free surface. The vortexingzone size depends on the biased distance of the SEN, and the intensity of the vortexing flow depends on the casting speed of the continuous caster. Only when the location and strength of the magnetic field are properly chosen, can the vortexing flow be suppressed by a static magneticfield application. The effect of argon gas injection on the vortexing flow is not remarkable. The combination of magneticfield application and argon gas injection can correct the biased flow and suppress the vortexing flow by suppressing the surface velocity and removing the downward velocity near the SEN in the mold.

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李宝宽， BAOKUAN LI， TOSHIMITSU OKANE， and TAKATERU UMEDA
METALLURGICAL AND MATERIALS TRANSACTIONS B VOLUME 31B, DECEMBER 20001491，0001，（）：
1年11月30日
A mathematical model has been developed to analyze molten metal flow, considering the effects of argon gas injection and static magneticfield application in the continuous casting process. The k« turbulence model is used to calculate the turbulent variables. A homogeneous fluid model with variable density is employed to tackle the molten metalargon gas flow. The electromagnetic force is incorporated into the Navier–Stokes equation, and the effects of boundary conditions of the magnetic field on the velocity distribution near the mold wall are included. A good agreement between the numerically obtained flowfield results and measurements is obtained. The argon gas injection changes the molten metal flow pattern, mainly in the upper portion of the mold. By applying the magnetic field, values of the averaged velocity field in the bulk decrease significantly, and, especially at the top free surface, they become very small, which can cause meniscus freezing. When magneticfield application and argon gas injection are used together, the external flow field out of the gas plume is significantly suppressed; nevertheless, flotation of gas bubbles is still active and is not affected directly by the magnetic field. Although the penetrating length of the gas plume is shortened, the argon gas bubbles in molten steel still cause fluctuation at the top free surface, which prevents the occurrence of freezing.

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【期刊论文】Effect of Rotating Magnetic Field on Twophase Flow in RH Vacuum Degassing Vessel
李宝宽， Baokuan LI and Fumitaka TSUKIHASHI)
ISIJ International, Vol. 45 (2005), No.7，0001，（）：
1年11月30日
Rotating magnetic field is applied in upleg of RH vessel to promote the removal of non metallic inclusions of molten steel and to prolong the life of RH equipment. Physical and mathematical models have been developed to understand the twophase turbulent flow considering the effect of the rotating magnetic field in the RH vacuum degassing vessel. Water model experiments verified that the gas bubbles can be moved toward the central zone of upleg of RH vessel as the result of density difference between gas bubbles and liquid in the swirling flow. The larger circulation flow rate can be obtained in RH degassing vessel with the effect of swirling flow. A penetrating velocity, which does not change the equation characteristics but changes solution distribution, is proposed to revise the gas volume fraction conservation equation. A revised gas volume fraction conservation equation is successfully used to solve the gas distribution in RH vessel. If there is no swirling flow, the larger upward velocities and maximum of the gas volume fraction appear near wall of upleg. If the rotating magnetic field is applied in upleg, the larger upward velocities occur in the central zone of upleg. These phenomena agree with the experimental observation. When the rotating electromagnetic force is applied, the numerical results showed that a swirling flow may be produced and extended into the vacuum chamber. As the occurrence of swirling flow in upper part of upleg, the maximum of gas volume fraction moves toward the center zone of upleg and the upward parabolic velocity distribution is also formed.
RH vacuum degassing vessel， twophase flow， rotating magnetic field， swirling flow.，

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【期刊论文】Vortexing Flow Patterns in a Water Model of Slab Continuous Casting Mold
李宝宽， Baokuan LI and Fumitaka TSUKIHASHI)
ISIJ International, Vol. 45 (2005), No.1，0001，（）：
1年11月30日
A water model experiment was conducted to observe the vortexing flow in the steel slab continuous casting mold, the snakeshaped Plexiglas mold was designed to simulate the actual caster. The camera was used to record the flow patterns, which were visualized by injecting the black sesames into water. The changes of shape of single vortex and two vortices with time have been observed during experiments. A numerical model has been developed to analyze the vortexing flow, which may be produced by moving the submerged entry nozzle from center to offcenter in the slab continuous casting of steel. According to the numerical results, the vortexing flow is resulted from threedimensional biased flow in the mold. A vortex is located at the low velocity side adjacent to the submerged entry nozzle. The vortex strength depends on the local horizontal velocity of fluid and decreases gradually with distance from the free surface. The vortexing zone size depends on the biased distance of the submerged entry nozzle, and intensity of the vortexing flow depends on the casting speed of the continuous caster.
continuous casting， water model， simulation， vortexing flow.，

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李宝宽， Baokuan LI and Fumitaka TSUKIHASHI)
ISIJ International, Vol. 43 (2003), No.6，0001，（）：
1年11月30日
Numerical estimation has been conducted to analyze the motion of inclusion considering the effects of argon gas injection and magnetic field application in the continuous casting of slab. The fluid velocity field was obtained by solving the Navier–Stokes equations with electromagnetic force, and the trajectories of inclusion particles are calculated based on the computed velocity field. A reasonable agreement between numerical and experimental trajectory for single sphere was obtained using the water model. The movements of particles are traced in cases with and without the magnetic field and argon gas injection. The results show that some particles after spiral movements reenter the jet zone of molten steel, and then enter the opposite circulation zone. Inclusions in the upper circulation zone are easily removed. Argon gas injection increases the removal rate of inclusions. The spiral trajectories of inclusion particles disappear when the magnetic field is applied, and the particle velocities decrease significantly. The argon gas injection and magnetic field application are effective for the control of the inclusions.
continuous casting， inclusion， argon gas injection， magnetic field， computer simulation.，

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李宝宽， Baokuan LI and Fumitaka TSUKIHASHI)
ISIJ International, Vol. 41 (2001), No.8，0001，（）：
1年11月30日
A mathematical model has been developed to analyze the mass transfer in the sequence continuous casting process with the static magnetic field. The induced electromagnetic force is obtained by solving simultaneous equations for the momentum and the electromagnetic field. The application of static magnetic field affects the mass transfer by changing the flow field in the strand. The results of numerical calculation show a reasonable agreement of the calculated relative concentration of mixed steel with the measured one. The mixing of molten steel in the low part of the mold is significantly suppressed by the static magnetic field, and composition of new grade steel along the slab length in the transition zone increases significantly. The distribution of relative concentration averaged at cross section changes from parabolic to integral symboliclike along the slab length, and the transition length is reduced about 50% by applying the magnetic field of 0.5 T.
continuous casting， mass transfer， static magnetic field application， numerical calculation.，

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李宝宽， Baokuan LI and Fumitaka TSUKIHASHI)
ISIJ International, Vol. 40 (2000), No.12，0001，（）：
1年11月30日
A mathematical model has been developed to analyze the circulating flow characteristics in RH Degassing vessel designed for twoand multilegs system. The homogeneous model with the spatially variable density was used to simulate gasliquid flow in uplegs. The difference of density between pure liquid and gasliquid was considered to be a driving force of circulation flow. The volume fraction of gas was obtained by modifying the gas plume model of the stirred ladle. The complicated geometry including ladle, vacuum, uplegs, and downleg was considered by incorporation of blockage technique. Numerical calculations of the circulating flow have been conducted for the water model of RH degassing vessel with twoand multilegs with changing the air flowrates from 5 to 35 l/min. Computed velocities at the exit of downleg agree well with the observed data available in the literature. The momentum transport in RH degassing vessel with multilegs will be larger than that with twolegs. This is justified based on fact that the velocities in RH degassing vessel with multi legs tend to be uniform, i.e. the mean velocity of bulk in a ladle is remarkably larger than that in twolegs. Simulated transient concentration profile of the tracer from top surface to interior shows clearly the difference of flow characteristics between twoand multilegs RH degassing vessels.
RH degassing vessel， circulating flow， modeling， twoand multilegs operations.，

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【期刊论文】Fluid Flow and Mixing Process in a Bottom Stirring Electrical Arc Furnace with Multiplug
李宝宽， Baokuan LI
ISIJ International, Vol. 40 (2000), No.9，0001，（）：
1年11月30日
Fluid flow and mixing process in a bottom stirring electrical arc furnace (EAF) with the singleand multiplug are experimentally and numerically studied. A homogeneous fluid with a spatially variable density is used to model the gasliquid flow. ke turbulence model is employed to calculate the effective viscosity. The five layouts are selected to examine the mixing times. The mixing time is defined as the function of the diameter, number, location of plugs and the tracer injection point. The results show that the variation of mixing time is not obvious with the increasing of plug diameter, but the stirring efficiency is getting better when plug number is increased and distributed in deep and offcentral region in vessel. This is because the angular velocities occur and the more stirring energy is obtained in such layouts.
bottom stirring electrical arc furnace (， EAF)， ， fluid flow and mixing process， mathematical model.，

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