检索结果-南通市图书馆

Flow Behavior in Z-Path Fluidized-Moving Bed with Inclined Perforated Plate

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2002年第1期9卷 19-24页

作者： GUO zhan-cheng TOKUDA Masanori Institute of Process Engineering CAS Center for Northeast Asia Studies Tohoku University

Much researches on the operation and structure of tundish were carried out at Xiangtan Iron and Steel Co Ltd to increase the yield of grade 20 carbon steel on the continuous casting production line. Through analyzing formation mechanism of pinholes and non metallic inclusions in billets and describing pattern of the flow of molten steel in tundish by a mathematic model, it was shown that the structure and operation of tundishes play an important part in product quality. So some measures were taken as follows: (1) Optimizing the tundish construction to decrease the impact of liquid steel and lengthening the residence time of liquid steel for homogenization of liquid steel; (2) Improving the influent and effluent operation of liquid steel to avoid the contact of liquid steel with air in order to decrease reoxidation; (3) Reducing over heat during continuous casting. After above measures being taken, the yield of grade 20 carbon steel and the service life of equipment were improved remarkably.

关键词： carbon steel continuous casting quality tundish

Efficient Video Transmission in D2D Assisted Mobile Cloud Networks

在线全文

学校读者我要写书评

暂无评论

China Communications 2016年第8期13卷 74-83页

作者： cheng zhan Zhe Wen School of Computer and Information Science Southwest University

The increasing popularity of smart mobile devices and the rise of online services has increased the requirements for efficient dissemination of social video contents. In this paper,we study the problem of distributing video from cloud server to users in partially connected cooperative D2 D network using network coding. In such a scenario, the transmission conflicts occur from simultaneous transmissions of multiple devices, and the scheduling decision should be made not only on the encoded packets but also on the set of transmitting devices. We analyze the lower bound and give an integer linear formulation of the joint optimization problem over the set of transmitting devices and the packet *** also propose a heuristic solution for this setup using a conflict graph and local graph at every device. Simulation results show that our coding scheme significantly reduces the number of transmission slots, which will increase the efficiency of video delivery.

关键词： network coding video delivery device-to-device mobile cloud networks

Effect of Al_(2)O_(3)/SiO_(2) mass ratio and CaO content on viscosity and structure of slag for pyrometallurgical processing of spent automotive catalysts

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3期31卷 608-621页

作者： Zhe Wang Qi-long Wei cheng-bin Shi zhan-cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The effect of Al_(2)O_(3)/SiO_(2) mass ratio and CaO content on the viscosity and structure of the CaO-Al_(2)O_(3)-SiO_(2)-6MgO-1.5ZrO_(2)-1.5CeO_(2) slag was *** results show that with the increase in Al_(2)O_(3)/SiO_(2) mass ratio,the viscous flow units within the slag gradually change from Si-O-Si to Al-O-Al and ***,the substitution of Al_(2)O_(3) for SiO_(2) leads to the transformation of Si-O bonds towards weaker Al-O bonds,which weaken the bond strength of the aluminosilicate networks,thus leading to a decrease in the viscosity of *** increase in CaO content effectively promotes the depolymerization of the aluminosilicate networks,resulting in a significant decrease in the viscosity of the *** slag with Al_(2)O_(3)/SiO_(2) of 0.7-1.5 and CaO of 30 wt.%shows promise as the reference slag system for the Fe-collection smelting of spent automotive catalysts due to its good comprehensive performance.

关键词： Aluminosilicate slag Al_(2)O_(3)/SiO_(2)mass ratio CaO content Viscosity Slag structure

NO_x reduction by coupling combustion with recycling flue gas in iron ore sintering process

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2011年第4期18卷 390-396页

作者： Yan-guang Chen zhan-cheng Guo Gen-sheng Feng School of Chemistry and Chemical Engineering No.beast Petroleum University Daqing 163318 China2 Key Laboratory of the Ministry of Education of China for Recycling ＆ Ecological Metallurgy University of Science and Technology Beijing Beijing 100083 China2

A new process called＇NOx reduction by coupling combustion with recycling flue gas（RCCRF）＇was proposed to decrease NOx emission during the iron ore sintering *** simulation test of NOx reduction was performed over sintered ore and in the process of coke ***,NOx reduction was also carried out by sintering pot *** sintered ore,the amount of NOx emission is reduced by 15wt%-25wt% at 400-550oC using 2.0vol% H2 or 2.0vol% CO,or reduced by 10wt%-30wt% at 560-720oC using 0.15vol% *** reduction is around 10wt% by coupling combustion of pyrolysis gas and coke,or around 16wt% by recycling flue gas into coke *** RCCRF,the maximum NOx reduction ratio is about 23wt% in coke combustion experiment and over 40wt% in sintering pot test.

关键词： nitrogen oxides combustion flue gases iron ores sintering

Recovery of zinc from Zn-Al-Fe alloys by gas pressure filtration

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2020年第11期27卷 1322-1330页

作者： Tian-yang Li Zhe Wang Lei Guo zhan-cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The recovery of zinc from galvanizing dross and the removal of iron contained dross particles by gas pressure filtration were investigated using the model of Zn-Fe-Al *** majority of molten zinc was separated after filtration,and the residue intercepted by the filter consisting mostly of dross *** effects of the pressure differential(p),separation temperature(T)and alloy composition on the zinc recovery and iron removal were *** p=0.30 MPa and T=723 K,86.2 wt.%zinc was recovered from the Zn-4Al-2Fe alloy,and up to 99.9 wt.%of the iron was concentrated in the *** a higher pressure differential led to the improved filtration efficiency,and the desired separation temperature was about 723 *** aluminum content in the Zn-Al-Fe alloy had little effect on separation efficiency,whereas increasing the iron content led to a decrease in the separation *** findings demonstrate the potential of the gas pressure filtration method for the recovery of zinc from galvanizing dross.

关键词： Galvanizing dross Gas pressure filtration Zinc recovery Iron removal Separation

Dynamics and Stability of Potential Hyper-networked Evolutionary Games

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2017年第2期14卷 229-238页

作者： Ting Liu Yuan-Hua Wang Dai-zhan cheng Key Laboratory of Systems and Control Institute of Systems ScienceChinese Academy of Sciences Institute of Control Science and Engineering Shandong University

This paper considers the modeling and convergence of hyper-networked evolutionary games （HNEGs）. In an HNEG the network graph is a hypergraph, which allows the fundamental network game to be a multi-player one. Using semi-tensor product of matrices and the fundamental evolutionary equation, the dynamics of an HNEG is obtained and we extend the results about the networked evolutionary games to show whether an HNEG is potential and how to calculate the potential. Then we propose a new strategy updating rule, called the cascading myopic best response adjustment rule （MBRAR）, and prove that under the cascading MBRAR the strategies of an HNEG will converge to a pure Nash equilibrium. An example is presented and discussed in detail to demonstrate the theoretical and numerical results.

关键词： (Hyper-) Networked evolutionary game (HNEG) potential cascading myopic best response adjustment rule (MBRAR),Nash equilibrium semi-tensor product of matrices.

Effects of gravity on the electrodeposition and characterization of nickel foils

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 59-65页

作者： Ting Liu zhan-cheng Guo Zhi Wang Ming-yong Wang State Key Lab of Multiphase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of the Ministry of Education of China for Ecological and Recycle Metallurgy University of Science and Technology Beijing Beijing 100083 China

The effects of gravity on nickel electrodeposition,the morphology and mechanical properties of deposits were studied in a super gravity *** in a microgravity field were also presented based on the obtained experimental *** sweep voltammetry reveals that the nickel electrodeposition process is enhanced by increasing the gravity coefficient（G）.The limiting current density changes from 10.2 to 293.0 mA·cm-2 with the increase of the G value from 10-4 to *** morphology of deposits was analyzed by scanning electron microscopy（SEM） and atomic force microscopy（AFM）.The images show that the morphology deposited in the super gravity field has finer grain sizes and denser and smoother *** roughness reduces from 48.3 to 4.9 nm with the increase of the G value from 10-4 to ***,mechanical tests indicate that the mechanical properties of nickel foils are greatly improved due to introducing a super gravity field during electrodeposition.

关键词： metal foil nickel gravity microgravity electrodeposition mechanical properties

Rapid removal of copper impurity from bismuth-copper alloy melts via super-gravity separation

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2021年第12期28卷 1929-1939页

作者： Xiao-chun Wen Lei Guo Qi-peng Bao zhan-cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

A green method of super-gravity separation,which can enhance the filtration process of bismuth and copper phases,was investigated and discussed for the rapid removal of copper impurity from bismuth-copper alloy *** separation by the super-gravity field,the bismuth-rich liquid phases were mainly filtered from the alloy melt along the super-gravity direction,whereas most of the fine copper phases were retained in the opposite *** optimized conditions of separation temperature at 280℃,gravity coefficient at 450,and separation time at 200 s,the mass proportion of the separated bismuth from the Bi-2 wt%Cu and Bi-10 wt%Cu alloys respectively reached 96%and 85%,which indicated the minimal loss of bismuth in the ***,the removal ratio of impurity copper from the Bi-2 wt%Cu and Bi-10 wt%Cu alloys reached 88%and 98%,***,the separation process could be completed rapidly and is environmentally friendly and efficient.

关键词： alloy alloys separation

Phosphorus Removal of High Phosphorus Iron Ore by Gas-Based Reduction and Melt Separation

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2010年第9期17卷 1-6页

作者： TANG Hui-qing GUO zhan-cheng ZHAO Zhi-long Key Laboratory of Ecological and Recycle Metallurgy of Ministry of Education University of Science and Technology Beijing Beijing 100083 China

A new method （gas-based separation plus melt separation） has been proposed to remove phosphorus of the high phosphorus iron ore which was 1.25 % of phosphorus content and 50. 0% of iron content. HSC chemistry package and the coexistence theory of slag structure were adopted for theoretical analysis. The gas-based reduction was carried out using a fixed bed reactor and the ore sample of 80 g with an average particle size of 2 mm were reduced using CO or H2 at temperature of 1 073 K for 5 hours. 50 g of the reduced sample with 3.0% CaO as additive was then subjected to melt separation in an electric furnace at temperature of 1 873 K under Ar atmosphere. In each run, SEM, EDS, optical microscopic examination and chemical analysis of the reduced ore sample, the metal sample and the slag sample were conducted. Results of all gas-based reduction experiments showed that iron metallization ratios were some 65% and the phosphorus compounds in the ore remained unchanged. It was agreed well with the simula- tions except for the iron metallization rate being less than predicted value; this difference was attributed to kinetics. Results of melt separation experiments showed that P content in metal samples is 0.33% （metal sample from H2 reduction product） and 0.27% （metal sample from CO reduction product）. The phosphorus partition ratios of both cases were less than predicted values. Some P in the metal samples existed as slag inclusion was considered to be the reason for this discrepancy.

关键词： HSC chemistry package coexistence theory slag structure high phosphorus iron ore gas-based reduction melt separation