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Journal of Iron and Steel Research(International) 2012年第S2期19卷 905-908页

作者： LI De-wei SU Zhi-jian marukawa katsukiyo HE Ji-cheng Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University Formerly Sumitomo Metal Industries Ltd.

Sliding gate control system is widely employed in continuous casting process of steel to control flow rate of molten steel.As molten steel passes through a sliding gate,uneven flow develops.This will cause asymmetrical distribution of flow and temperature field in mold consequently,formation of vortex near the nozzle and entrapment of CC powder into the molten steel.etc,which have negative effect on process productivity and product quality.To suppress the uneven flow,electromagnetic swirling flow has been proposed to impose on the flow in submerged entry nozzle below the sliding gate.In this study the uneven flow developed by incompletely open sliding gate and the suppression of this uneven flow using electromagnetic swirling flow are numerically studied in round billet continuous casting of steel process.The improvement of the flow and temperature filed in the submerged entry nozzle and mold are investigated.It is found that:The uneven velocity in nozzle can be suppressed by electromagnetic swirling flow,and the flow and temperature field in mold be improved obviously;With the increase of electromagnetic swirling intensity,the effect of uneven flow can be almost completely suppressed.

关键词： continuous casting process sliding gate,uneven flow,electromagnetic swirling flow round billet

Fundamental Study on Continuous Casting Process With Swirling Flow by Electromagnetic Force

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Journal of Iron and Steel Research(International) 2012年第S2期19卷 879-883页

作者： SU Zhi-jian LI De-wei CHEN-Jin marukawa katsukiyo HE Ji-cheng Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University Formerly Sumitomo Metal Industries Ltd.

Swirling flow in a submerged entry nozzle is effective on improving quality of casting block and casting speed in continuous casting of steel.A new method for swirling flow generation in the nozzle has been proposed by the authors,that is a rotating electromagnetic field is set up around a submerged entry nozzle(SEN)to induce swirling flow in it by Lorentz force.In this study,the magnetic field in molten steel in the submerged entry nozzle,the flow and temperature field in the SEN and mold in round,square billet and slab continuous casting process of steel are numerically studied.The model experiment of electromagnetic swirling continuous casting is also conducted with low melting point alloy.The commercial test for slab is undergoing.Results by numerical simulation and experiment show that the swirling flow by the optimum designed electromagnetic swirling generator can not only improve the distribution of flow and temperature in mold but also achieve the same effects generated by the swirling blade process. And,more effects on continuous casting process can be expected after this electromagnetic swirling process is optimized.

关键词： continuous casting process submerged entry nozzle swirling flow rotating magnetic field numerical simulation

Structural Optimization of Electromagnetic Swirling Flow in Nozzle of Slab Continuous Casting

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Acta Metallurgica Sinica(English Letters) 2018年第12期31卷 1317-1326页

作者： Xiao-Wei Zhu De-Wei Li Chun-Lei Wu katsukiyo marukawa Qiang Wang Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University School of Metallurgy Northeastern University School of Resources and Materials Northeastern University at Qinhuangdao

During the slab continuous casting process, the flow field of molten steel in the mold plays a decisive role in the quality ofthe slab. In this paper, electromagnetic swirling flow in nozzle technology is proposed to control the flow field in mold.This technology can drive molten steel to rotate inside the submerged entry nozzle by electromagnetic force, therebycontrolling the flow field. This research shows that it can reduce the impact of molten steel on the bottom of nozzle andpartly reduce the negative pressure at the upper part of nozzle outlet which is even eliminated by optimizing the structureand angle of nozzle. The area of heat flux of the mold wall becomes larger, and the crest value of heat flux gets lower thanthat without swirling in nozzle and any nozzle optimization. The meniscus fluctuates smoothly, and the flow velocity at thetop surface is within a reasonable range. The temperature field distribution in the mold is uniform which was beneficial tothe growth of equiaxed crystal and decreased element segregation.

关键词： Continuous casting Submerged entry nozzle Electromagnetic swirling flow Slab Numerical simulation

Simulation on Effect of Divergent Angle of Submerged Entry Nozzle on Flow and Temperature Fields in Round Billet Mold in Electromagnetic Swirling Continuous Casting Process

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Journal of Iron and Steel Research(International) 2014年第2期21卷 159-165页

作者： De-wei LI Zhi-jian SU katsukiyo marukawa Ji-cheng HE Key Laboratory of Electromagnetic Processing of Materials of Ministry of Education Northeastern University

A new process for swirling flow generation in the submerged entry nozzle （SEN） in continuous casting process of steel was proposed. A rotating electromagnetic field was set up around the SEN to induce swirling flow by Lorentz force. The flow and temperature fields in the SEN and round billet mold with electromagnetic swirling were numerically simulated and then verified by the electromagnetic swirling model experiment of low melting point alloy. The effects of divergent angle of the SEN on the flow and temperature fields in mold with electromagnetic swirling were investigated. The electromagnetic swirling flow generator （EMSFG） could effectively induce swirling flow of molten steel in the SEN, which consequently improved greatly the flow and temperature fields in the mold. Below the nozzle outlet in mold, with the increase of divergent angle, the stream of bulk flow diverged more widely, the high temperature zone shifted up, and the temperature field became more uniform. Above the nozzle outlet in mold, with 350 A electromagnetic swirling, when the divergent angle of the SEN increased, the upward flow velocity and the meniscus temperature first increased and then decreased. With a divergent angle of 60~, the upward flow velocity and meniscus temperature reaced the largest value.

关键词： continuous casting process swirling flow flow field divergent angle round billet

A New Steel Teeming Technology by Using Electromagnetic Induction Heating System in Ladle

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Journal of Iron and Steel Research(International) 2012年第S2期19卷 766-770页

作者： LI De-jun WANG Qiang LIU Xing-an Gao Ao WANG Xue-bin DONG Jie katsukiyo marukawa HE Ji-cheng Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University Technology Center of Shandong Laiwu iron and steel Group

In order to overcome the pollution of the tratitional nozzle sand into the molten steel in tundish,a new method is proposed in this paper.In this method,the nozzle sand is substituted with iron-carbon alloy particles which have the same or similar compositions as the liquid steel.During casting processes,iron-carbon alloy forms solidification shell and the sintered layer in the upper nozzle to block the molten steel.When the slide gate is opened,the eletromagnetic induction heating is used to melt them so as to achieve 100%smoothly steel teeming.The electromagnetic induction heating effects were analyzed theoretically in the new slide gate system.Then the new method has been experimentally tested by using self-designed experimental device.The results show that the electromagnetic induction heating can complete the steel teeming within the required time.Furthermore,this steel-teeming technology can further improve the cleanliness of liquid steel.

关键词： clean steel induction heating continuous casting electromagnetic metallury automatic casting ratio

二垩英与资源回收-Ⅰ考虑到二垩英生成的资源与能量回收基础研究

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钢铁 2003年第Z1期38卷 73-75页

作者： katsukiyo marukawa Shigeta HARA Hirotoshi KAWABATA Hideki ONO-NAKAZATO Tateo USUI Toshihiro TANAKA Hongzhi SHI Baoshan Iron & Steel Co. LTD China and Collaborative Research Center for Advanced Science and Technology Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan （Graduate School of Engineering Osaka University Japan） Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Baoshan Iron & Steel Co. LTD China

目前在日本,存在大量工业垃圾,包括各种塑料制品,ASR(汽车破碎垃圾),含有毒PCB(多氯联苯)的110变压器和PVC(聚氯乙稀)制品等.而来自城市垃圾焚烧炉的废气含有大量能量.因此,在充分考虑环境、避免二垩英生成的同时,安全回收来自工业垃圾... 详细信息

目前在日本,存在大量工业垃圾,包括各种塑料制品,ASR(汽车破碎垃圾),含有毒PCB(多氯联苯)的110变压器和PVC(聚氯乙稀)制品等.而来自城市垃圾焚烧炉的废气含有大量能量.因此,在充分考虑环境、避免二垩英生成的同时,安全回收来自工业垃圾、城市和/或工业垃圾焚烧炉的资源和能量是个非常重要的课题,这也将对抑制CO2排放作出贡献.正确地阐明焚烧过程中二垩英的生成机理及详细研究含少量二垩英的焚烧废气在冷却过程中大量形成二垩英的临界温度是项很重要的工作.解决这个问题可有效实现资源和能量的回收.本报告介绍日本在二垩英排放方面目前采取的对策和存在的问题以及大阪大学为阻止二垩英生成所做的基础研究工作.

关键词：焚烧过程工业垃圾和废钢二垩英生成机理资助和能量回收抑制二垩英生成

二垩英与资源回收-Ⅱ燃烧过程二垩英抑制和生成基础研究

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钢铁 2003年第Z1期38卷 76-78页

作者： Hirotoshi KAWABATA Tateo USUI Shigeta HARA Toshihiro TANAKA Hideki ONO-NAKAZATO Mashayuki TANABE katsukiyo marukawa Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Baoshan Iron & Steel Co. LTD China and Collaborative Research Center for Advanced Science and Technology Osaka University Japan

氯来源、种类和燃烧物中氯浓度对燃烧过程中二垩英生成有重要影响.在实验燃烧炉中研究1 073K温度下上述三种因素对燃烧过程二垩英生成的影响.二垩英生成浓度在相同氯源和种类条件下与燃烧物中氯含量几乎成正比,且受氯源明显影响.如有机... 详细信息

氯来源、种类和燃烧物中氯浓度对燃烧过程中二垩英生成有重要影响.在实验燃烧炉中研究1 073K温度下上述三种因素对燃烧过程二垩英生成的影响.二垩英生成浓度在相同氯源和种类条件下与燃烧物中氯含量几乎成正比,且受氯源明显影响.如有机氯化合物或无机氯化物.即使对无机氯化物,在有活性氯存在时也会生成高浓度二垩英,如由盐和面粉形成的水化物中的活性氯.

关键词：氯源氯种类燃烧过程二垩英/呋喃水化物 PVC

二垩英与资源回收-Ⅲ燃烧过程二垩英生成热力学计算

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钢铁 2003年第Z1期38卷 79-81页

作者： Hideki Ono-Nakazato Hirotoshi Kawabata Tateo Usui Shigeta Hara Toshihiro Tanaka Mashayuki Tanabe katsukiyo marukawa Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Graduate School of Engineering Osaka University Japan Baoshan Iron & Steel Co. LTD China and Collaborative Research Center for Advanced Science and Technology Osaka University Japan

进行相关热力学计算以研究高温燃烧过程二垩英生成的条件.计算得到:①在体系存在过剩氧即完全燃烧时不会产生二垩英;②当有固体碳沉积时也不会生成二垩英,因固体碳在热力学上比含二垩英的含碳物更稳定.另一方面,实际上即使在1 073 K完... 详细信息

进行相关热力学计算以研究高温燃烧过程二垩英生成的条件.计算得到:①在体系存在过剩氧即完全燃烧时不会产生二垩英;②当有固体碳沉积时也不会生成二垩英,因固体碳在热力学上比含二垩英的含碳物更稳定.另一方面,实际上即使在1 073 K完全燃烧条件下(即体系显著过剩氧)也有二垩英生成,原因是在实际燃烧炉中含碳微粒不可能完全烧尽.从热力学角度假设不发生碳沉积,计算得出二垩英在1 073 K高温和高CO/CO2比范围内会生成.实际考虑的条件放在燃烧炉内含碳微粒的周围.在有含碳微粒存在条件下,即使反应2CO→C+CO2(碳沉积)发生,C+CO2→2CO反应(CO生成;含碳微粒被CO2氧化)也会同时发生,导致在含碳微粒周围保持一个高的CO/CO2比,由此产生二垩英.假设在含碳微粒周围存在高CO/CO2比的异质位置,则认为二垩英会形成.

关键词：燃烧过程二垩英生成含碳微粒热力学

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氧气转炉炼钢中的STB法

钢铁 1982年第3期17卷 53-57页

作者：丸川净雄阎峰王世栋住友金属工业公司鹿岛钢铁厂

1. 绪言1952年研制成功的氧气顶吹转炉炼钢法(BOF)改革了炼钢技术.在最近25年BOF技术,包括过程控制取得了显著的进步.目前BOF法已达到了它的顶峰.1968年发明了氧气底吹转炉炼钢法(OBM),并用于实际生产.这一炼钢方法揭示了许多有趣的特点,

关键词：气体量吹人钢中转炉 STB 金属熔池完全混合喷嘴堵塞混合气体全铁量脱磷反应钢水收得率气体发生法最佳量底吹吹炼炼钢方法

DIOXINS AND RECYCLING OF RESOURCES-Ⅰ FUNDAMENTAL STUDIES ON RECOVERY OF RESOURCES AND ENERGY IN CONSIDERATION OF DIOXINS FORMATION

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DIOXINS AND RECYCLING OF RESOURCES-Ⅰ FUNDAMENTAL STUDIES ON...