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Nano-Scale Modelling and Simulation of Metal Wiredrawing by Using Molecular Dynamics Method

World Journal of Nano Science and Engineering 2014年第2期4卷 70-83页

作者： Ken-ichi Saitoh Youhei Sameshima Syuhei Daira Department of Mechanical Engineering Kansai University Suita Japan Graduate School of Science and Engineering Kansai University Suita Japan Graduate School of Science and Engineering Kansai University Suita Japan Denso Techno Co. Ltd. Obu Japan

In this paper, molecular dynamics (MD) simulations of nano-sized wiredrawing are performed. The wiredrawing is a traditional plastic working method, but there has not been any insight to develop it in a nano-sized scale. Therefore, to materialize the concept of the nano-sized wiredrawing, a numerical modelling is pursued at first in this paper, and the interatomic potential, a crystalline orientation, the drawing condition realized by a die geometry are thoroughly investigated. In particular, to reduce the friction between a wire and a die, a simple friction model for the MD analysis is newly proposed, where the interatomic interaction is adequately modified by a single factor ω. Then, the fruitful results are obtained by using ω = 0.1. We checked the availability of such nano-sized MD simulation by constructing a two-dimensional wiredrawing model, at first. The analysis of atomic stress during drawing is also assessed. It is useful to use invariant of the atomic stress tensor, such as hydrostatic stress (average stress, σm) or von Mises equivalent stress (σeq). The former is related to the phase transformation from the body-centered-cubic (bcc) structure to the face-centered-cubic (fcc) one, which is found in the present MD simulation. It is observed that an initial α-iron crystal with bcc structure changes partially into the fcc phase. It is recognized that the phase transformation is caused by the positive hydrostatic stress values, which is occurring especially inside the die region. We observed that a lot of dislocation core structures occur in wiredrawing process and their existence and evolution are well related to the equivalent stress values.

关键词： Molecular Dynamics iron and steel Wiredrawing Plastic Working Nanotechnology Materials Processing Crystalline Structure

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供水系统中冲刷对金属管道内壁生物膜脱落的影响作用（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2017年第4期18卷 313-328页

作者： Jing-qing LIU Zhi-feng LUO Ke LIU Yi-fu ZHANG Hong-xi PENG Bao-lan HU Hong-xing REN Xiao-yan ZHOU Shang-de QIU Xiao-fang HE Ping YE Hamid BASTANI Li-ping LOU college of Civil Engineering and Architecture Zhejiang University Hangzhou 310058 China college of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou 310014 China college of Environmental and Resource Sciences Zhejiang University Hangzhou 310058 China Shaoxing Water Environmental Science Institute co. ltd. Shaoxing 312000 China Jiayuan Water Supply and Sewerage company Jiaxing 314000 China

目的:在市政供水管网系统中,由冲刷引起的管道内壁生物膜脱落可能造成饮用水二次污染。本文旨在通过研究冲刷前后生物膜理化特性和微生物种群结构的变化,探讨不同金属管材管道和不同冲刷流速对生物膜脱落的影响,从而为管道生物安全的风... 详细信息

目的:在市政供水管网系统中,由冲刷引起的管道内壁生物膜脱落可能造成饮用水二次污染。本文旨在通过研究冲刷前后生物膜理化特性和微生物种群结构的变化,探讨不同金属管材管道和不同冲刷流速对生物膜脱落的影响,从而为管道生物安全的风险评估提供科学依据。创新点:不同菌属的细菌对水力冲刷的敏感程度不同;各菌属对水力变化的敏感程度既与菌属本身的性质有关,也与其附着生长的管材有关。方法:1.采用R2A培养基平板计数、16S rD NA检测、荧光定量聚合酶链式反应及454焦磷酸测序技术。2.通过理化指标检测与测序相结合的方式进行分析,并以丰度图和热度图的形式呈现结果。结论:1.球墨铸铁管内壁生物膜的抗水力剪切能力较强,能够抵抗低剪切冲刷,在高剪切力冲刷后才会明显脱落,而灰口铸铁管和不锈钢复合管内壁生物膜的抗水力剪切能力较弱,低剪切力冲刷工况便会导致生物膜的明显脱落。2.生物膜对冲刷的抵抗作用在其群落的属水平和纲水平上有显著变化,这与群落本身和管材特性均有关联。

关键词：供水管网系统生物膜冲刷金属管道

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Terminal Temperature Prediction of Molten steel in VD Furnace based on XGBoost and LightGBM Algorithms

Terminal Temperature Prediction of Molten Steel in VD Furnac...

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第40届中国控制会议

作者： Wang-Feng Zhou Jian-Guo Wang Long-Fei Deng Yuan Yao Jian-Long Liu School of Mechatronical Engineering and Automation Shanghai University Shanghai Key Lab of Power Station Automation Technology Department of Chemical Engineering Tsing-Hua University Shanghai Minghua Electric Power Science &Technology co. Ltd.

In the iron and steel industry, vacuum refining is the previous process of continuous casting, and the VD furnace is one of the key equipment for vacuum refining. The precise control of the end temperature is an important guarantee for the quality of subsequent cast steel products. In this paper, based on the XGBoost algorithm and the LightGBM algorithm, the VD furnace molten steel terminal temperature prediction model will be established respectively, and their performance will be compared. First, perform data preprocessing on the original industrial data, fill in missing values, use Tukey’s test method to detect and delete outliers, and use box-cox data transformation to normalize the data. Then, the random forest feature selection algorithm was used to select 8 variables as the input of the model. Finally, the temperature prediction models based on the XGBoost and LightGBM algorithms were established. The experimental results show that the models based on the XGBoost algorithm and the LightGBM algorithm both have good prediction effects, and the prediction accuracy within ±10℃ reached 89.86%, and the overall performance of the LightGBM model is better than XGBoost model.

关键词： VD furnace temperature prediction feature selection XGBoost LightGBM

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ENVironMENTAL PROTECTION MEASURES IN JAPAN’S steel INDUSTRY

ENVIRONMENTAL PROTECTION MEASURES IN JAPAN’S STEEL INDUSTRY

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International Symposium on Global Environment and steel Industry(ISES’03)

作者： Osamu Iimura Sumitomo Metal Industries Ltd.

＜正＞steel industries in Japan have been seeking environmental excellence for sustainable development. This is an overview of the efforts for reduced environmental impact made by Japan during the last decade of the 20th century. The Japan iron and steel Federation （JISF） launched a voluntary action program in 1996 for addressing environmental issues. It placed priority on two major items, namely, prevention of global warming and establishment of recycle-oriented society. The action plan set a specific goal to reduce the energy for steel production by 10% in 2010 as compared to 1990, assuming that the steel production level would stay at 100 million tons per year. An additional program （use of waste plastic） will make it 11.5% in total, adding 1.5% to the original goal. As a result of the internal efforts of the industry, co2 emission in 2001 has decreased by 9.2% since 1990. Additionally, the use of high-performance steels and by-products has delivered a 6.1% co2 reduction in 2000. For recycle-oriented society, which is another goal of the action program, reduction of steel wastes and increased recycling of steel cans have been implemented successfully toward 2010.

关键词： Environmental protection Global warming co2 emission High-performance steel

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2023年中国非高炉炼铁行业现状及发展展望

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中国废钢铁 2023年第6期 36-42页

作者：陶江善 Tao Jiangshan 天津奥沃冶金技术咨询有限公司 Tianjin Aowo Metallurgical Technology consulting co. LTD.

本文介绍了目前国内非高炉炼铁行业发展现状、存在问题和发展前景,在碳达峰、碳中和政策目标下,节能减排、环保低碳经济下,电炉钢产能逐渐增加、废钢资源利用越来越多,非高炉炼铁技术有望成为实现钢铁工业低碳炼铁的趋势。

关键词：直接还原铁非高炉炼铁碳达峰碳中和

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Phosphorous Determination during the Oxygen Blow

Phosphorous Determination during the Oxygen Blow

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第八届（2011）中国钢铁年会

作者： Walter Vortrefflich Willem Heijne Jui Sen Wang Danieli corus BV Rooswijkweg 271 1951ME Velsen-NoordThe Netherlands MSc Danieli corus BV Rooswijkweg 271 1951ME Velsen-NoordThe Netherlands BSc MDC Sublance Probe Technology (Shanghai) co. Ltd

＜正＞INTRODUCTION controlling Phosphorous levels during the steelmaking process has always been *** the increased use of iron ores containing high Phosphorous,the measurement of Phosphorous at end point in BOF steelmaking continues to be a subject of interest because of the impact of Phosphorous on steel *** slag is complex in nature and contains several oxides like CaO,SiO 2,P2O5,MgO,MnO,and FeO *** the end of blow the

关键词： steel Making BOF Sublance TSO Process control DIRC Phosphorous Real-Time

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中国钢铁工业减污降碳协同控制技术发展与展望

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Engineering 2023年第12期31卷 37-49页

作者： Tingyu Zhu Xiaolong Liu Xindong Wang Hong He CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China State Key Joint Laboratory of Environment Simulation and Pollution control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China HBIS Group co. Ltd.Shijiazhuang 050023China

As the largest steel-producing country,China’s steel industry has experienced rapid development in terms of production level and *** to the high consumption of coal in the iron and steel industry,air pollutants and carbon dioxide(co_(2))show similar emission properties in flue *** view of the collaborative reduction of pollution and carbon emissions,the emission standards for pollutants and carbon were first analyzed,suggesting that carbon emission standards for the iron and steel industry should be accelerated.A collaborative technology system for the reduction of pollution and carbon emissions from the iron and steel industry in China is demonstrated,consisting of(1)optimization of present ultra-low emission technology,(2)low-carbon innovation for present production processes,(3)steel production process reengineering,and(4)carbon capture,utilization,and storage(CCUS).Finally,the technical prospect for collaborative reduction of pollution and carbon emissions from the iron and steel industry in China is suggested to support high-quality green development in this industry.

关键词： iron andsteelindustry Pollution Carbon emissions collaborative reduction

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管线用低温韧性钢板合金设计选择

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钢铁钒钛 2016年第1期37卷 100-103页

作者： kathayat t s goyal rajesh k shant raghu khadia sohanlal 王瑞珍(译) Welspun corp.ltd. AnjarGujaratIndia 不详

较高碳含量钢种的低韧性和低的可焊性制约了它们在管线钢中应用,因此,建立起了低碳微合金化钢用于陆上和海上管线钢的良好需求。对于低碳微合金钢,在最小工艺和合金成本条件下获得所需的力学性能,合金设计起着重要作用。在合金设计过程... 详细信息

较高碳含量钢种的低韧性和低的可焊性制约了它们在管线钢中应用,因此,建立起了低碳微合金化钢用于陆上和海上管线钢的良好需求。对于低碳微合金钢,在最小工艺和合金成本条件下获得所需的力学性能,合金设计起着重要作用。在合金设计过程中,虽然主要焦点是考虑从板坯再加热到最终轧制的热轧工艺,但是为保证钢的洁净度,也不能忽视炼钢和连铸过程,为此给出了合金设计和热轧参数的详细研究,以获得最佳的力学性能,包括在-25℃进行落锤撕裂试验获得较高的韧性。试验钢采用API 5L X70M PSL2的板坯,轧制成尺寸为25 mm×3 830 mm钢板。并将力学测试结果与显微组织分析和热轧参数相互关联。

关键词：管线钢低碳微合金钢合金设计落锤撕裂试验热轧连铸

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Relevance of New and Emerging Processes in Enhancing Sustainability of Indian steel Industry

Relevance of New and Emerging Processes in Enhancing Sustain...

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Asia steel International conference 2012(Asia steel 2012)

作者： TARAFDAR Aditi MITRA Subrata ROY Bhaskar M.N.Dastur & company(P)ltd. KolkataIndia

World steel Association has projected Indian apparent steel consumption to grow at 6.9 percent during 2012 and 9.4 percent during *** this basis,India’s steel consumption is projected to be in the region of 80 million tons by 2013. According to national steel strategists,India should target a domestic steel capability of 200 million tons by *** will necessitate putting in place a proper plan for substantial augmentation of domestic *** a plan must also ensure the long term sustainability of the Indian steel *** paper reviews the four major factors that would significantly contribute towards ensuring the long term sustainability of the Indian steel industry,namely,(ⅰ) adoption of appropriate production processes/technologies,(ⅱ) proper utilization of locally available raw materials,(ⅲ) ensuring adequate financial viability under varying market conditions,and(ⅳ) limiting the harmful effects on the environment through improved *** availability and characteristics of Indian raw materials,*** ore and coal,are discussed,including possibilities of utilizing large resources of low grade iron ore and high ash ***,the current levels of energy intensity and co emission by the Indian steel industry are reviewed,and possible measures suggested for reducing the carbon foot print,including adoption of newer/emerging process routes that are expected to be techno-commercially viable.

关键词： Indian steel industry emission smelting reduction direct reduction coal gasification carbon footprint

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利用铝业废渣和副产品作为钢铁工业精炼合成渣

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钢铁 2003年第Z1期38卷 208-212页

作者： Y.-D. Yang I.D. Sommerville A. McLean X. Bi J. Hou Dept. Of Materials Science & Engineering University of Toronto Ontario Canada M5S-3E4 Dept. Of Materials Science & Engineering University of Toronto Ontario Canada M5S-3E4 Dept. Of Materials Science & Engineering University of Toronto Ontario Canada M5S-3E4 Dept. of Metallurgy Wuhan University of Science & Technology HuBei China Shandong Aluminum Co. Ltd. Zhibo Shandong China

讨论了利用铝业的废渣和副产品作为钢铁工业的精炼合成渣的可能性和实际结果,介绍了一些将铝业废渣转化为炼钢合成渣的成功工艺,概述了脱硫方面使用铝酸钙为基的合成渣的有关理论.通过合理利用冶金废渣材料,可减少对来自冶金工业的固体... 详细信息

讨论了利用铝业的废渣和副产品作为钢铁工业的精炼合成渣的可能性和实际结果,介绍了一些将铝业废渣转化为炼钢合成渣的成功工艺,概述了脱硫方面使用铝酸钙为基的合成渣的有关理论.通过合理利用冶金废渣材料,可减少对来自冶金工业的固体废渣的总处理量.

关键词：铝业铝酸钙环境铁水脱硫废渣

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