检索结果-南通市图书馆

Effect of SiO2 substitution with Al2O3 during high-Al TRIP steel casting on crystallization and structure of low-basicity CaO–SiO2-based mold flux

引用

Journal of Iron and Steel Research International 2020年第1期27卷 33-41页

作者： Ding-li Zheng Cheng-bin Shi Zhi-jun Li Jing Li Jung-wook Cho State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Division of steelmaking Shougang Qian’an Iron and Steel Co.Ltd.Qian’an 064404HebeiChina Graduate Institute of Ferrous Technology Pohang University of Science and TechnologyPohang 790-784Republic of Korea

The crystallization and structure of non-conventional lime-silica-based mold fluxes after undergoing slag-steel interaction in casting high-AI transformation induced plasticity(TRIP)steel were *** results showed that the crystallization temperatures of the mold fluxes decreased with decreasing the SiO2/Al2O3 ratio,and CaO/MnO2 ratio had an opposite effect on the crystallization *** crystalline phases precipitated in the mold flux were Ca4Si2O7F2 and *** SiO2/Al2O3 ratio and increasing CaO/MnO2 ratio in the mold fluxes have no influence on the types of crystalline *** dominant crystalline phase precipitated in each mold flux was Ca4Si2O7F2 with dendritic morphology,except for part of that with globular morphology in the mold flux without MnO2 ***4 crystals are distributed in the space among Ca4Si2O7F2 *** size of Ca4Si2O7F2 crystals in the slag with higher S1O2/AI2O3 ratio is smaller,which is attributed to the polymerization degree of the mold flux with increasing SiO2/Al2O3 ratio.[SiO4]-tetrahedral,[AlO4]-tetrahedral and T-O-T bending(T denotes Si or Al)depolymerized gradually with decreasing SiO2/Al2O3 ratio,and an opposite trend was observed for the case with increasing CaO/MnO2 *** polymerization degree of the mold fluxes decreased,which would result in the decrease in the viscosity of the mold fluxes.

关键词： Mold flux Crystallization Structure Continuous casting High-AI steel

来源：

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

Direct reduction swelling behavior of pellets in hydrogen-based shaft furnaces under typical atmospheres

引用

International Journal of Minerals,Metallurgy and Materials 2022年第10期29卷 1891-1900页

作者： Zichuan Zhao Jue Tang Mansheng Chu Xindong Wang Aijun Zheng Xiaoai Wang Yang Li School of Metallurgy Northeastern UniversityShenyang 110819China Institute for Frontier Technologies of Low-carbon steelmaking Northeastern UniversityShenyang 110819China Liaoning Province Engineering Research Center for Technologies of Low-Carbon steelmaking Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China HBIS Group Co. LtdShijiazhuang 050000China Xuanhua Iron and Steel Group Co. LtdShijiazhuang 075100China Iron and Steel Research Institute of HBIS Group Co. LtdShijiazhuang 050000China

Hydrogen-based shaft furnace process is gaining more and more attention due to its low carbon emission, and the reduction behavior of iron bearing burdens significantly affects its operation. In this work, the effects of reduction degree, temperature, and atmosphere on the swelling behavior of pellet has been studied thoroughly under typical hydrogen metallurgy conditions. The results show that the pellets swelled rapidly in the early reduction stage, then reached a maximum reduction swelling index (RSI) at approximately 40%reduction degree. The crystalline transformation of the iron oxides during the reduction process was the main reason of pellets swelling. The RSI increased significantly with increasing temperature in the range of 850-1050℃, the maximum RSI increased from 6.66%to 25.0%in the gas composition of 100%H_(2). With the temperature increased, the pellets suffered more thermal stress resulting in an increase of the volume. The maximum RSI decreased from 19.78%to 17.35%with the volume proportion of H_(2) in the atmosphere increased from 55%to 100%at the temperature of 950℃.The metallic iron tended to precipitate in a lamellar structure rather than whiskers. Consequently, the inside of the pellets became regular, so the RSI decreased. Overall, controlling a reasonable temperature and increasing the H_(2) proportion is an effective way to decrease the RSI of pellets.

关键词： hydrogen metallurgy gas-based shaft furnace swelling crystalline transformation iron whisker hydrogen

来源：

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

Improving cleanliness of 30Cr2Ni4MoV low-pressure rotor steel by CaO-SiO_(2)-MgO-Al_(2)O_(3) slag refining

引用

Journal of Iron and Steel Research International 2022年第9期29卷 1434-1445页

作者： Yong-bo Peng Cheng-song Liu Ling Yang Song-wei Hou Ri-jin Cheng Hua Zhang Hong-wei Ni The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and steelmaking Wuhan University of Science and TechnologyWuhan 430081HubeiChina Huangshi Product Quality Supervision and Inspection Institute Huangshi 435000HubeiChina

The optimal composition of a CaO-SiO_(2)-Al_(2)O_(3)-MgO slag in the ladle furnace refining process was investigated to precisely control the contents of[0]and[Si]and improve the cleanliness of 30Cr2Ni4MoV *** iso-[O]lines and iso-[Si] lines of the equilibrium between the CaO-SiO_(2)-Al_(2)O_(3)-MgO refining slag and 30Cr2Ni4MoV steel at 1873 K were calculated by the thermodynamic software FactSage 7.3,and the activities of SiO_(2),Al_(2)O_(3)and CaO in the refining slag were discussed to achieve the optimal composition range of the refining ***,combined with high-temperature"slag-steel"equilibrium experiments,the effects of different refining slags on the oxygen contents,chemical composi-tions,quantities and sizes of inclusions in steels were studied,and then the thermody namic formation mechanism of MgAl_(2)O_(4) inclusions in 30Cr2Ni4MoV steel was *** results showed that the contents of dissolved[O]nd[Si]in steel can be controlled below 10 × 10^(-6)and 0.05%.respectively;when the slag basicity is above *** CaO/Al_(2)O_(3)ratio is above *** the mass fraction of SiO_(2)in the slag docs not cxcced 7%.The chemical composition of the slag has a great influence on the removal and composition of *** assessed stability phase diagrams of ***_(2)O_(3)and MgOAl_(2)O_(3) inclusion formation in the Fe-Al-Mg-O system calculated by FactSage 7.3 show good agreement with the experimental results.

关键词： 30Cr2Ni4MoV steel Non metallic inclusion Refining slag Basicity CaO/Al_(2)O_(3) ratio

来源：

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

Inclusion control of automotive spring steel in the basic oxygen furnace and ingot casting process

引用

Baosteel Technical Research 2010年第2期4卷 44-47页

作者： ZHANG Jianchun DI Yongzhong HU Huijun WAN Genjie steelmaking plant Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200941 China Tube and Pipe Business Unit Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200941 China

The process of automotive spring steel in the basic oxygen furnace and ingot casting （BOF-IC） of Baosteel is described in this paper. High quality spring steel can be obtained through designing reasonable deoxidizat... 详细信息

关键词： BOF-IC spring steel nonmetallic inclusion steel purity

来源：

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

Research on the optimization of tundish by water model

引用

Baosteel Technical Research 2009年第2期3卷 31-35页

作者： ZHANG Liqiang FENG Xinhua LI Xiaoqiang WANG Jianjun ZHOU Li School of Metallurgy and Resources Anhui University of Technology Ma＇ anshan 243002 China Ironmaking plant Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200941 China steelmaking plant Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200941 China

Based on the principle of similarity, water was used to simulate the flow of molten steel to analyze the flow field in a tundish. Several schemes of the tundish＇ s tracer shape were designed and corresponding water model experiments were conducted. During the experiments, a computer automatically collected data. The comparison of the residence time distribution（ RTD ） curves drawn according to the computer-collected data optimized the scheme and photographs originated from the experiments with ink as its tracer. It indicates that the water model can optimize the flow field of the tundish.

关键词： tundish water model experiment tracer flow field

来源：

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

Morphological transformation of elongated MnS inclusions in non-quenched and tempered steel during isothermal heating

引用

Journal of Iron and Steel Research International 2023年第3期30卷 525-536页

作者： Jun-yu Liu Cheng-song Liu Rui-juan Bai Wei Wang Qing-bo Wang Hua Zhang Hong-wei Ni The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and steelmaking Wuhan University of Science and TechnologyWuhan 430081HubeiChina Henan Jiyuan Iron&Steel(Group)Co. Ltd.Jiyuan 459000HenanChina

Elongated MnS inclusions in rolled non-quenched and tempered steel tend to cause the mechanical anisotropy of steel,deteriorate the mechanical properties and degrade the quality and service life of the steel *** reveal the mechanisms of morphological transformation of strip-shaped MnS inclusions during isothermal heating,the effects of heat treatment time and temperature on the morphology,number density and size distribution of elongated MnS inclusions were systematically studied and discussed.A diffusion couple experiment was also conducted to clarify the diffusion mode of MnS *** experimental results showed that with the increase in isothermal heating time(from 0 to 10 h at 1473 K)and temperature(from 1173 to 1573 K for 3.0 h),the number density and average aspect ratio of MnS inclusions generally showed an increase and decrease trend,respectively,while the area fraction remained stable and only slightly fluctuated around 0.4%.In the diffusion couple,after the isothermal heating at 1473 K for 3.0 h,the elements Mn and S in the steel near the steel-MnS interface were very stable without any concentration *** morphology change sequence of the elongated MnS inclusions in the rolled non-quenched and tempered steel during the isothermal heating was strip→cylinderization→spindle→*** between the diameter of MnS inclusion and the spacing between two MnS inclusions after splitting,and the fitting goodness of different n values under different experimental time and temperature confirmed that the driving force for the transformation of MnS inclusions during the isothermal heating was surface diffusion,instead of volume diffusion.

关键词： Non-quenched and tempered steel MnS inclusion Isothermal heating Surface diffusion Morphological transformation

来源：

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

Production Planning System for the Whole steelmaking Process of Panzhihua Iron and Steel Corporation

引用

Journal of Iron and Steel Research International 2014年第S1期21卷 44-50页

作者： Jian-yu LONG Zhong ZHENG Xiao-qiang GAO Yong-min GONG College of Materials Science and Engineering Chongqing University College of Economics and Business Administration Chongqing University Vanadium-extracting and Steel-making plant Panzhihua Iron and Steel (Group) Co.

A production planning system is designed for the whole steelmaking process, which includes desulfurization, vanadium extraction, steelmaking and continuous casting processes of Panzhihua Iron and Steel Corporation. The system is composed of modeling module, data interface module, data analysis module, static planning module, re-planning module, plan evaluation module, plan simulation module and human-computer interaction module. The system is connected with the L3 system of steel plant by using the data interface module, which can receive the real time scheduling information to make the static plan and re-plan under production disturbances. The simulation and plan evaluation function of the system can assist decision-maker to check and modify the production plan. The simulation experiments with real process data show that the system can make a feasible, executable, and effective production plan, and deal with primary random disturbances during production process timely.

关键词： production planning replanning steelmaking-continuous casting vanadium extraction whole process of steel plant

来源：

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

Effect of Ca/Mg molar ratio on the calcium-based sorbents

引用

International Journal of Minerals,Metallurgy and Materials 2023年第11期30卷 2182-2190页

作者： Yumeng Li Qing Zhao Xiaohui Mei Chengjun Liu Henrik Saxén Ron Zevenhoven Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Institute for Frontier Technologies of Low-Carbon steelmaking Northeastern UniversityShenyang 110819China Process and Systems Engineering Laboratory Åbo Akademi UniversityÅbo/Turku 20500Finland

steelmaking industry faces urgent demands for both steel slag utilization and CO_(2)*** and Mg of steel slag can be extracted by acid solution and used to prepare sorbents for CO_(2)*** this work,the calcium-based sorbents were prepared from stainless steel slag leachate by co-precipitation,and the initial CO_(2)chemisorption capacity of the calcium-based sorbent prepared from steel slag with the Ca and Mg molar ratio of 3.64:1 was 0.40 g/***,the effect of Ca/Mg molar ratio on the morphology,structure,and CO_(2)chemisorption capacity of the calcium-based sorbents were *** results show that the optimal Ca/Mg molar ratio of sorbent for CO_(2)capture was4.2:1,and the skeleton support effect of MgO in calcium-based sorbents was ***,the chemisorption kinetics of the sorbents was studied using the Avrami-Erofeev *** were two processes of CO_(2)chemisorption,and the activation energy of the first stage(reaction control)was found to be lower than that of the second stage(diffusion control).

关键词： steel slag carbon dioxide capture sorbent chemisorption kinetics

来源：

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

Effect of Fe2O3 on the size and components of spinel crystals in the CaO–SiO2–MgO–Al2O3–Cr2O3 system

引用

International Journal of Minerals,Metallurgy and Materials 2019年第9期26卷 1113-1119页

作者： Qi-qiang Mou Jian-li Li Qiang Zeng Hang-yu Zhu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Hubei Provincial Key Laboratory for New Processes of Ironmaking and steelmaking Wuhan University of Science and TechnologyWuhan 430081China

size of spinel crystals in the CaO–SiO2–MgO –Al2O3–Cr2O3 system was investigated using lab experiments carried out in a carbon tube furnace. Scanning electron microscopy with energy-dispersive X-ray spectroscopy（SEM–EDS） and X-ray diffraction（XRD） were used to analyze the microstructure, components, and the mineral phases of synthetic slags. FactS age 7.1 was used to calculate the crystallization process of the molten slag. The results showed that the addition of Fe2O3 promoted the precipitation of spinel crystals and inhibited the formation of dicalcium silicate. The size of spinel crystals increased from 2.74 to 8.10 μm and the contents of chromium and iron in the spinel varied as the Fe2O3 addition was increased from 0 to 20 wt%. Fe2O3 thermodynamically provided the spinel-forming components to enhance the formation of FeCr2O4, MgFe2O4, and Fe3O4. The addition of Fe2O3 increased the fraction of liquid phase in a certain temperature range and promoted diffusion by decreasing the slag’s viscosity. Therefore, Fe2O3 is beneficial to the growth of spinel crystals in stainless steel slag.

关键词： ferric oxide stainless steel slag spinel crystal size chromic oxide

来源：

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

Effect of CaO/Al_(2)O_(3)on structure,viscosity,and surface tension of electroslag remelting-type CeO_(2)-bearing slag

引用

Journal of Iron and Steel Research International 2023年第4期30卷 717-725页

作者： Ding-li Zheng Guo-jun Ma Xiang Zhang Meng-ke Liu Ju Xu Hubei Provincial Key Laboratory for New Processes of Ironmaking and steelmaking Wuhan University of Science and TechnologyWuhan 430081HubeiChina The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The structure of electroslag remelting-type CaF_(2)–CaO–Al_(2)O_(3)–CeO_(2)slag with various CaO/Al_(2)O_(3)mass ratios and its correlation with viscosity and surface tension were *** Raman analysis of the slag shows that with increasing CaO/Al_(2)O_(3)mass ratio from 0.70 to 1.29 in the slag,the polymerization degree of the slag decreased,which was because more complex[AlO_(4)]-tetrahedral units of Q_(Al)^(3) and Q_(Al)^(4)were depolymerized to form relatively simpler structural units Q_(Al)^(0),Q_(Al)^(1),and Q_(Al)^(2),and the excess oxygen ions introduced by CaO promoted the transformation of[AlO_(4)]-tetrahedral units to[AlO_(6)]-octahedral *** CaO/Al_(2)O_(3)mass ratio has an obvious effect on reducing the viscosity and activation energy for viscous flow of the slag,resulting from the depolymerization of the *** to the decrease in the polymerization degree and the increase in the total Ca^(2+)content of the slag,the surface tension of the slag increases with the increase in CaO/Al_(2)O_(3)mass *** surface tension of the slag changes slightly with the temperature,irrespective of CaO/Al_(2)O_(3)mass ratio from 0.70 to 1.29 in the slag.

关键词： Electroslag remelting CeO_(2)-bearing slag CaO/Al_(2)O_(3) Structure Viscosity Surface tension

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：