检索结果-南通市图书馆

CO_(2) conversion and decarburization kinetics of CO_(2) gas and liquid Fe-C alloy at 1873 K

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2022年第3期29卷 425-433页

作者： Wen-he Wu Rong Zhu Zhi-zheng Li Chun-yang Wang guang-sheng wei School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Research Center of Carbon Dioxide Science University of Science and Technology BeijingBeijing100083China

The reactions between CO_(2) gas and liquid Fe-C alloy with different initial carbon concentrations at 1873 K were investigated using experimental results,thermodynamic equilibrium,and kinetic *** average CO_(2) conversion is greater than 80%when the carbon content ranges from 4.0 to 1.0 wt.%.When the carbon content decreases from 0.5 to 0.1 wt.%,the average CO_(2) conversion diminishes from 83.50%to 40.84%.This proves that CO_(2) gas and liquid Fe-C alloy reaction does not reach equilibrium under experimental conditions compared with the calculated thermodynamic *** the kinetic analysis,it is shown that in the medium-to high-carbon liquid Fe-C alloys,the rate-controlling step involves CO_(2) gas mass transfer or mixed rate-controlling of CO_(2) gas mass transfer with adsorption and dissociation of CO_(2) *** contrast,in the low-carbon liquid Fe-C alloy,carbon mass transfer occurs in the molten *** critical carbon content of the rate-controlling step transformation is 0.7937 wt.%.

关键词： CO_(2)utilization CO_(2)conversion Decarburization kinetics Fe-C alloy Rate-controlling step

Numerical Simulation of Jet Behavior and Impingement Characteristics of Preheating Shrouded Supersonic Jets

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2016年第10期23卷 997-1006页

作者： guang-sheng wei Rong ZHU Ting CHENG Fei ZHAO School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials University of Science and Technology Beijing National Center for Materials Service Safety University of Science and Technology Beijing

As a novel supersonic jet technology,preheating shrouded supersonic jet was developed to deliver oxygen into molten bath efficiently and ***,there has been limited research on the jet behavior and impingement characteristics of preheating shrouded supersonic *** fluid dynamics（CFD）models were established to investigate the effects of main and shrouding gas temperatures on the characteristics of flow field and impingement of shrouded supersonic *** preheating shrouded supersonic jet behavior was simulated and measured by numerical simulation and jet measurement experiment *** influence of preheating shrouded supersonic jet on gas jet penetration and fluid flow in liquid bath was calculated by the CFD model which was validated against water model *** results show that the uptrend of the potential core length of shrouded supersonic jet would be accelerated with increasing the main and shrouding gas ***,preheating supersonic jets demonstrated significant advantages in penetrating and stirring the liquid bath.

关键词： shrouded supersonic jet preheating gas temperature jet behavior impingement flow field

A review of carbon dioxide disposal technology in the converter steelmaking process

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2020年第11期27卷 1421-1429页

作者： Rong Zhu Bao-chen Han Kai Dong guang-sheng wei School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials University of Science and Technology BeijingBeijing 100083China

In last decade,the utilization of CO?resources in steelmaking has achieved certain metallurgical effects and the technology is *** this review,we summarized the basic reaction theory of CO2,the CO2 conversion,and the change of energy-consumption when CO2 was introduced in converter steelmaking *** the CO2-O2 mixed injection(COMI)process,the CO2 conversion ratio can be obtained as high as 80%or more with a control of the CO2 ratio in mixture gas and the flow rate of CO2,and the energy is saving and even the energy consumption can be reduced by 145.65 MJ/t under certain *** addition,a complete route of CO2 disposal technology is proposed combining the comparatively mature technologies of CO2 capture,CO2 compression,and liquid CO2 storage to improve the technology of CO2 *** results are expected to form a large-scale,highly efficient,and valuable method to dispose of CO2.

关键词： CO2 utilization carbon dioxide steelmaking enhanced stirring temperature control

Influence of bottom blowing oxygen on dust emission in converter steelmaking

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2021年第9期28卷 1105-1113页

作者： wei-feng Li Rong Zhu Chao Feng Bao-chen Han guang-sheng wei School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials University of Science and Technology BeijingBeijing 100083China

With the importance of the steelmaking industry in the economy and its negative impacts on the environment,reducing dust emissions is a vital focus in this ***,the theory of dust generation in converter steelmaking process was analyzed and the influence of bottom blowing oxygen on dust generation was obtained through experimental *** industrial test was carried out in a 120-t bottom combined blown O_(2)–CaO steelmaking *** results show that lowering the lance position can reduce the amount of *** emission rate of the converter is also found to be in direct proportion to the decarburization *** a result,the proposed bottom blowing O_(2)–CaO steelmaking converter can technically reduce the amount of dust and improve the recovery rate of *** more bottom blowing oxygen,the dust content is lower with the dust peak appearing *** evaporation theory,followed by the bubble theory,plays the primary role in the dust generation of bottom blowing oxygen *** points out the direction for the technology research and development of reducing dust generation.

关键词： Steelmaking converter Dust emission Bottom blowing O_(2)-CaO Evaporation theory Bubble theory

Theoretical study on the stability of nanobubbles and its verification in molecular dynamics simulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第4期87卷 99-105页

作者： sheng Mi Chaofeng Hou wei Ge School of Chemical Engineering and Technology Tianjin UniversityTianjin300072China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing.100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

The stability of vapor nanobubbles in bulk liquid was investigated theoretically and the critical bubble size was derived from macroscale thermodynamic equations,below which the system destabilizes with sharp drop in *** critical size was quantitatively verified in molecular dynamic simulation using the Lennard-Jones model of argon,where stronger attraction between the molecules at lower density is found to contribute most to the drop of system pressure and,as the Laplace pressure on the curved bubble interface fails to balance the pressure difference across the interface,the bubbles become *** theoretical model could be extended to other systems where reliable equations of state and interfacial tension are available.

关键词： Nanobubble Stability Phase diagram Critical size

Immune checkpoint inhibition mediated with liposomal nanomedicine for cancer therapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Military Medical Research 2024年第1期11卷 98-114页

作者： guang-Long Ma wei-Feng Lin Faculty of Medicine Centre for Cancer ImmunologyUniversity of SouthamptonSouthampton SO166YDUK Department of Molecular Chemistry and Materials Science Weizmann Institute of Science76100 RehovotIsrael Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China

Immune checkpoint blockade(ICB)therapy for cancer has achieved great success both in clinical results and on the *** the same time,success drives more attention from scientists to improve ***,only a small portion of patients are responsive to this therapy,and it comes with a unique spectrum of side effects termed immunerelated adverse events(irAEs).The use of nanotechnology could improve ICBs’delivery to the tumor,assist them in penetrating deeper into tumor tissues and alleviate their *** nanomedicine has been investigated and used for decades,and is well-recognized as the most successful nano-drug delivery *** successful combination of ICB with liposomal nanomedicine could help improve the efficacy of ICB *** this review,we highlighted recent studies using liposomal nanomedicine(including new emerging exosomes and their inspired nanovesicles)in associating ICB therapy.

关键词： Liposome Exosome Immune checkpoint blockade(ICB)

Effect of cooling method on TiN precipitation behavior of high-titanium high-strength steel during solidification

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2024年第7期31卷 1692-1703页

作者： Xue-jian Zhang guang-wei Yang Yong Wan Yong-hong Wen Chuan-sheng Tang Ming-qi Liu Li-je Tian Key Laboratory of Metallurgical Emission Reduction and Resources Recycling Anhui University of TechnologyMa'anshan 243002AnhuiChina School of Metallurgical Engineering Anhui University of TechnologyMa'anshan 243002AnhuiChina Baosteel Central Research Institute Baoshan Iron and Steel Co.Ltd.Shanghai 201999China

Metallographic microscopy,scanning electron microscopy and TiN growth thermodynamic and kinetic equations were used to investigate the morphology,quantity,and size of TiN in the center of high-titanium high-strength steels under different solidification cooling *** results showed that TiN in the center of the experimental steels mainly existed in three forms:single,composite(Al2O3-TiN),and multi-particle *** began precipitating at around 1497℃(solidification fraction of 0.74).From the end of melting to solidification for 180 s,the cooling rates in the center of the experimental steels for furnace cooling,air cooling,refractory mold cooling,and cast iron mold cooling tended to stabilize at 0.17,0.93,1.65,and 2.15℃/s,*** size of TiN in the center of the experimental steel cooled using furnace cooling was mainly concentrated in the 5-15 pm *** contrast,the size of TiN in the center of the experimental steels cooled using air cooling,refractory mold cooling,and cast iron mold cooling were mainly concentrated in the 1-5 pm *** addition,their density of TiN in the center of the experimental steels is signif-icantly higher than that of the furnace-cooled experimental *** and kinetic precipitation models of TiN established predicted the growth size of TiN in a high-titanium high-strength steel when the solidification cooling rates are not below 0.93℃/s.

关键词： High-titanium steel Cooling method TiN Thermodynamics Kinetics

Applying deep learning technique to chiral magnetic wave search

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第8期48卷 170-176页

作者： Yuan-sheng Zhao Xu-guang Huang Physics Department and Center for Particle Physics and Field Theory Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Fudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics National Natural Science Foundation of China and Fudan UniversityShanghai 200438China

The chiral magnetic wave(CMW)is a collective mode in quark-gluon plasma originated from the chiral magnetic effect(CME)and chiral separation *** detection in heavy-ion collisions is challenging owing to significant background ***[*** et al.,***.C 106,L051901(2022)],we constructed a neural network that accurately identifies the CME-related signal from the final-state pion *** this study,we have generalized this neural network to the case of CMW *** show that,after an updated training,the neural network effectively recognizes the CMW-related ***,we have assessed the performance of the neural network in comparison with other known methods for CMW search.

关键词： deep learning chiral magnetic wave relativistic heavy-ion collisions

Technological innovations of electric arc furnace bottom-blowing in China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2019年第9期26卷 909-916页

作者： guang-sheng wei Rong Zhu Yun Wang Xue-tao Wu Kai Dong School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-End Metal Materials University of Science and Technology BeijingBeijing 100083China

Nowadays, in China, the bottom-blowing technique plays an important role in accelerating the molten bath stirring and promoting the metallurgical reactions in electric arc furnace (EAF) steelmaking. The innovations of bottom-blowing technologies in EAF steelmaking were reviewed. The optimized bottom-blowing arrangement in EAF based on the furnace structure and the position of electrodes was introduced, and the fluid flow characteristics of EAF molten bath with bottomblowing were analyzed. Furthermore, bottom-blowing CO2 in EAF can facilitate the carbon-oxygen reaction reaching equilibrium and decrease the content of nitrogen in molten steel due to its special metallurgical properties. Pulsating bottom-blowing in EAF can effectively improve the molten bath stirring through the action of the unsteady bottom blowing gas streams, which could make the fluid flow field more disorderly than the steady bottom-blowing. And submerged O2 injection with CO2 in EAF can noticeably strengthen the EAF molten bath stirring, increase the production efficiency and improve the molten steel quality.

关键词： Electric arc furnace Bottom-blowing CO2 Pulsating bottom-blowing EAF combined blowing technology Submerged O2 injection with CO2