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炼钢领域新思维在jVSL的体现

炼钢领域新思维在JVSL的体现

中国金属学会2003中国钢铁年会

作者： j.K.Tandon j.p.n.lal p.Sasindran VVS.Raju IAK prakash jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA jindal Vijayanagar Steels Limited ToranagalluKarnatakaINDIA

jindal Vijayanagar（jVSL）钢铁有限公司是一个采用Corex技术,年生产能力为160万t的钢铁联合企业。jVSL邻近高品质铁矿,具有良好的后勤保障体系,为了提高公司的整体运行水平采用了许多非常规手段。通过采用一些大刀阔斧的改革,jVSL公...

jindal Vijayanagar（jVSL）钢铁有限公司是一个采用Corex技术,年生产能力为160万t的钢铁联合企业。jVSL邻近高品质铁矿,具有良好的后勤保障体系,为了提高公司的整体运行水平采用了许多非常规手段。通过采用一些大刀阔斧的改革,jVSL公司在短短的4年间跃升到印度钢铁工业中令人羡慕的位置。炼钢厂拥有2座转炉和2台连铸机,年生产160万t钢,不久的将来年生产能力将达到250万t。全世界范围的废钢短缺迫使jVSL公司寻找可替代废钢的冷料,并在短期内完善了直接还原铁（DRI）在转炉炼钢中的应用技术。耐火材料供应商娴熟的管理能力与jVSL公司炼钢生产的密切配合创造了许多耐材管理领域的奇迹。jVSL开始了一个雄心勃勃的计划——提高转炉炉龄到5000炉次。目前jVSL公司转炉的金属收得率为90%,连铸生产的收得率为98.45%。公司内部的技术革新一直是公司不断进步的推动力。技术革新包括采用自动化操作,开发中间包升降自动调整,结晶器热成像技术等。随着对炼钢和铸造生产各方面最佳操作的持续探索,公司开发了质量预测保障计划,在铸造生产中任何引起不稳定生产的异常行为都将被检测并提请立即进行观察。为了与时俱进,jVSL在废料控制和利用方面采取了一系列措施。通过对转炉生产和连铸生产废料的利用,jVSL公司的废料利用率超过80%。

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jVSL球团厂的最佳操作实践

JVSL球团厂的最佳操作实践

中国金属学会2003中国钢铁年会

作者： j.K.Tandon j.p.n.lal L.D.Saralaya Gururaj prasad 高斌

jVSL是一个年产160万t的联合炼钢厂,其炼铁系统装备有高标准的COREX技术。jVSL球团厂是世界上惟一一家使用低发热值燃料——Corex煤气生产优质球团用于内需和出口。当地可利用的铁矿石基本属于高脉石含量的铁矿。用这种矿石生产球团是... 详细信息

jVSL是一个年产160万t的联合炼钢厂,其炼铁系统装备有高标准的COREX技术。jVSL球团厂是世界上惟一一家使用低发热值燃料——Corex煤气生产优质球团用于内需和出口。当地可利用的铁矿石基本属于高脉石含量的铁矿。用这种矿石生产球团是一个艰巨的任务。在jVSL,我们运用最佳操作,已经掌握了利用高脉石含量的铁矿生产优质球团的技术。

关键词：废物利用修正 Corex 操作实践高铝矿优化过程参数

采用板坯热装热送生产工艺提高生产率及节约能源

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采用板坯热装热送生产工艺提高生产率及节约能源

中国金属学会2003中国钢铁年会

作者： j.K.Tandon j.p.n.lal A.K.Aggarwal p.Sasindran D.K Tripathi 魏军 jindal Vijay nagar Steel Limited INDIA

jVSL厂安装了热装热送生产线,以满足产品质量的不断提高、价格竞争的日趋激烈及按需供货的需求。2002年6月,自从该生产线在印度的,jindal nagar钢铁有限公司投入使用后,提高了生产率,降低了能源消耗。jVSL炼钢厂有两台连铸机,热轧带钢... 详细信息

jVSL厂安装了热装热送生产线,以满足产品质量的不断提高、价格竞争的日趋激烈及按需供货的需求。2002年6月,自从该生产线在印度的,jindal nagar钢铁有限公司投入使用后,提高了生产率,降低了能源消耗。jVSL炼钢厂有两台连铸机,热轧带钢厂有一座250t/h加热炉,一条长为80mtr辊道,两个可旋转90°的滚动辊道将连铸机生产的板坯运送到热装辊道。把板坯提升到热轧厂加热炉辊道和一个提升装置已经安装完毕。所有的设备运行良好,这篇文章介绍了设备的安装和优点。

关键词： hot charging slab turn table hot box elevator and hot charging table

Wettability,reactivity,and interface structure in Mg/ni system

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journal of Magnesium and Alloys 2024年第2期12卷 659-672页

作者： S.Terlicka n.Sobczak Ł.Maj p.Darłak j.j.Sobczak Institute of Metallurgy and Materials Science Polish Academy of Sciences25 Reymonta Str.KrakowPoland Faculty of Foundry Engineering AGH University23 Reymonta Str.KrakowPoland

The sessile drop method was applied to the experimental investigation of the wetting and spreading behaviors of liquid Mg drops on pure ni *** comparison,the experiments were performed in two variants:(1)using the Capillary purification(Cp)procedure,which allows the non-contact heating and squeezing of a pure oxide-free Mg drop;(2)by classical Contact Heating(CH)*** high-temperature tests were performed under isothermal conditions(Cp:760℃for 30 s;CH:715℃for 300 s)using Ar+5 wt%H_(2) *** the sessile drop tests,images of the Mg/ni couples were recorded by CCD cameras(57 fps),which were then applied to calculate the contact angles of metal/substrate *** and transmission electron microscopy analyses,both coupled with energy-dispersive X-ray spectroscopy,were used for detailed structural characterization of the solidified *** was found that an oxide-free Mg drop obtained by the Cp procedure showed a wetting phenomenon on the ni substrate(an average contact angleθnpreading and good wetting over the ni substrate(θ_((Cp))~20°in 5 s)to form a final contact angle ofθ_(f(Cp))~18°.In contrast,a different wetting behavior was observed for the CH procedure,where the unavoidable primary oxide film on the Mg surface blocked the spreading of liquid Mg showing apparently non-wetting behavior after 300 s contact at the test ***,in both cases,the deep craters formed in the ni substrates under the Mg drops and significant change in the structure of initially pure Mg drops to Mg-ni alloys suggest a strong dissolution of ni in liquid Mg and apparent values of the final contact angles measured for the Mg/ni system.

关键词： Magnesium-based alloys Sessile drop tests Capillary purification procedure Wettability Reactivity Contact angle

Cavity-agnostic acoustofluidic manipulations enabled by guided flexural waves on a membrane acoustic waveguide actuator

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Microsystems & nanoengineering 2024年第2期10卷 153-171页

作者： philippe Vachon Srinivas Merugu jaibir Sharma Amit lal Eldwin j.ng Yul Koh joshua E.-Y.Lee Chengkuo Lee Department of Electrical and Computer Engineering National University of SingaporeSingaporeSingapore Institute of Microelectronics Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore SonicMEMS Laboratory School of Electrical and Computer EngineeringCornell UniversityIthacaNYUSA School of Electrical and Data Engineering University of Technology SydneyUltimoNSWAustralia

This article presents an in-depth exploration of the acoustofluidic capabilities of guided flexural waves(GFWs)generated by a membrane acoustic waveguide actuator(MAWA).By harnessing the potential of GFWs,cavity-agnostic advanced particle manipulation functions are achieved,unlocking new avenues for microfluidic systems and lab-on-a-chip *** localized acoustofluidic effects of GFWs arising from the evanescent nature of the acoustic fields they induce inside a liquid medium are numerically investigated to highlight their unique and promising *** traditional acoustofluidic technologies,the GFWs propagating on the MAWA’s membrane waveguide allow for cavity-agnostic particle manipulation,irrespective of the resonant properties of the fluidic ***,the acoustofluidic functions enabled by the device depend on the flexural mode populating the active region of the membrane *** demonstrations using two types of particles include in-sessile-droplet particle transport,mixing,and spatial separation based on particle diameter,along with streaming-induced counter-flow virtual channel generation in microfluidic pDMS *** experiments emphasize the versatility and potential applications of the MAWA as a microfluidic platform targeted at lab-on-a-chip development and showcase the MAWA’s compatibility with existing microfluidic systems.

关键词： waveguide fluid cavity

Evaluation of corneal parameter changes under different accommodative stimuli with Scheimpflug imaging-based tomography

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国际眼科杂志 2024年第9期24卷 1357-1366页

作者： Farid j Bedrán-García David p piñero Department of Optics Pharmacology and AnatomyUniversity of AlicanteAlicante 03690Spain

AIM:To evaluate the reliability of measurements of corneal changes with accommodation in healthy eyes using a Scheimpflug imaging-based system and how these measurements distribute in the normal ***:prospective,non-randomized,comparative study including 27 healthy subjects(54 eyes),including emmetropia(13 eyes),myopia(17 eyes),hyperopia(4 eyes)and astigmatism(20 eyes)*** all cases,a complete eye examination was performed,including the analysis of corneal changes with different accommodative stimuli(+2.00,0.00 and-3.00 D)using the pentacam AXL *** investigation was structured in 2 phases:repeatability analysis and characterization of accommodation-related corneal changes in healthy ***:In the repeatability analysis,the index of height asymmetry(IHA)showed the greatest variability with the three accommodative stimuli,being the results for the rest of parameters *** group of emmetropes showed significant differences with accommodative changes in the position of maximum keratometry(Kmax;pn the astigmatism group,significant changes were not only observed in the position of Kmax,but also in minimum corneal thickness(MCT),corneal spherical aberration,and total and low order aberration root mean square(all pnificant difference was found in the displacement of the X position of Kmax with+2.00 D and-3.00 D in the myopia group(p=0.033)as well as in changes with+2.00 D and-3.00 D in the magnitude of the position vector of Kmax in the emmetropia group(pno significant changes were found between accommodative stimuli in the displacement of coordinates of MCT(p≥0.109).COnCLUSIOn:The position of Kmax and MCT in healthy corneas can change significantly when presenting different accommodative stimuli using the accommodation mode of the pentacam system,with different trends in these accommodation-related corneal changes between refractive ***,the consistency of the measurement

关键词： corneal biomechanics keratometry corneal thickness pachymetry corneal aberrations pentacam accommodation

Characterization of bright betatron radiation generated by direct laser acceleration of electrons in plasma of near critical density

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Matter and Radiation at Extremes 2024年第2期9卷 26-35页

作者： j.Cikhardt M.Gyrdymov S.Zähter p.Tavana M.M.Günther n.Bukharskii n.Borisenko j.jacoby X.F.Shen A.pukhov n.E.Andreev O.n.Rosmej Faculty of Electrical Engineering Czech Technical University in Prague16627 Prague 6Czech Republic Goethe University FrankfurtMax-von-Laue-Straße 160438 Frankfurt am MainGermany GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstraße 164291 DarmstadtGermany Focused Energy GmbH Im Tiefen See 4564293 DarmstadtGermany national Research nuclear University MEphI Kashirskoe shosse 31115409 MoscowRussian Federation Lebedev physical Institute RAS Leninskiy Prospekt 53119991 MoscowRussian Federation Heinrich-Heine-University Düsseldorf Universitätsstrasse 1DüsseldorfGermany joint Institute for High Temperatures RASIzhorskaya st.13Bldg.2125412 MoscowRussian Federation Moscow Institute of physics and Technology Institutskiy Pereulok 9141700 DolgoprudnyRussia

Directed x-rays produced in the interaction of sub-picosecond laser pulses of moderate relativistic intensity with plasma of near-critical density are investigated. Synchrotron-like (betatron) radiation occurs in the process of direct laser acceleration (DLA) of electrons in a relativisticlaser channel when the electrons undergo transverse betatron oscillations in self-generated quasi-static electric and magnetic fields. In anexperiment at the pHELIX laser system, high-current directed beams of DLA electrons with a mean energy ten times higher than the ponderomotive potential and maximum energy up to 100 MeV were measured at 10^(19) W/cm^(2)laser intensity. The spectrum of directed x-raysin the range of 5–60 keV was evaluated using two sets of Ross filters placed at 0°and 10°to the laser pulse propagation axis. The differential x-ray absorption method allowed for absolute measurements of the angular-dependent photon fluence. We report 10^(13) photons/sr withenergies >5 keV measured at 0°to the laser axis and a brilliance of 10^(21) photons s^(−1) mm^(−2) mrad−2(0.1%BW)−1. The angular distributionof the emission has an FWHM of 14°–16°. Thanks to the ultra-high photon fluence, point-like radiation source, and ultra-short emissiontime, DLA-based keV backlighters are promising for various applications in high-energy-density research with kilojoule petawatt-class laserfacilities.

关键词： laser acceleration critical

The impact of maternal immune activation on the morphology and electrophysiological properties of postnatally-born neurons in the offspring

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neural Regeneration Research 2024年第2期19卷 399-400页

作者： Emilio j.Galván Angelica Zepeda Departamento de Farmacobiología CINVESTAV Unidad Sur CdMxMéxico、Centro de Investigaciones sobre el EnvejecimientoCIE-CinvestavCdMxMéxico Departamento de Medicina Genómica y Toxicología Ambiental Instituto de Investigaciones BiomédicasUniversidad Nacional Autónoma de MéxicoUNAMCdMxMéxico

pregnancy comes with a combination of physical changes and physiological immunosuppression that increases the susceptibility of women to pathogens and in turn,rises the prevalence of infectious diseases.

关键词： prevalence activation impact

Robust hybrid bismuth perovskites as potential photocatalysts for overall water splitting

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nano Research 2024年第5期17卷 4593-4601页

作者： Antonio j.Chacón-García Herme G.Baldovi Artem A.Babaryk Antonio Rodríguez-Diéguez Sergio navalón Yolanda pérez Hermenegildo García patricia Horcajada Advanced porous Materials Unit IMDEA Energy InstituteAvda.Ramón y Cajal 328935 MóstolesMadridSpain Departamento de Química Universitat Politècnica de València46022 ValènciaSpain Departamento Química Inorgánica Universidad de Granada1807GranadaSpain Departamento de Biología y Geología Física y Química Inorgánica.ESCET.Universidad Rey Juan Carlos28933 MóstolesMadridSpain Instituto de tecnología química CSIC-UpV Universitat Politècnica de València(UPV)46022Spain

Organic-inorganic hybrid perovskites have gained great attention as promising photocatalysts for hydrogen ***,due to their poor stability in water,the use of aqueous hydrohalic acid solutions is specifically required for an efficient hydrogen ***,three novel photoactive lead-free hybrid perovskites based on bismuth and triazolium cations(denoted as IEF-15,IEF-16,and IEF-17(IEF stands for IMDEA energy frameworks))were synthesized and fully characterized(structural,compositional,optical,etc.).Further,these solids were proposed as photocatalysts for the challenging gas phase overall water splitting(OWS)***,IEF-16 thin films exhibited a remarkable photocatalytic activity in both H_(2) and O_(2) evolution,as a consequence of its appropriate bandgap and energy-band alignment,achieving hydrogen evolution rates ofμmol·g_(H_(2))^(-)1846 and 360 after 24 h under ultraviolet-visible(UV-vis)irradiation or simulated solar irradiation,*** study additionally highlights the remarkable structural and photochemical stability of IEF-16 under different operational conditions(*** volume,irradiation and temperature),paving the way for green hydrogen production from OWS using perovskite-based photocatalysts.

关键词： bismuth-based hybrid perovskites thin films photocatalysis overall water splitting green hydrogen