检索结果-南通市图书馆

Heat distribution model under hydrogen-rich low-carbon conditions in blast furnace

Journal of Iron and Steel research International 2024年第3期31卷 584-594页

作者： Gang Wang Jun Xu Kun He Zhong-ping Zou Hao Bai School of Metallurgy and Ecological Engineering University of Science and Technology BeijingBeijing 100083China cisdi low-carbon blast furnace research office MCC Low-Carbon Technology Research InstituteChongqing 401122China

low carbon development of blast furnaces is one of the key technological directions in the current development of *** to the differences in the physical and chemical properties of hydrogen and carbon,hydrogen-rich media entering a blast furnace will change the heat distribution,thus affecting the stability of ***,a heat distribution model was proposed to study the temperature distribution in a blast furnace,simultaneously considering gas-solid heat exchange,slag and iron melting,and chemical *** model was used to analyze the temperature distribution of a 2300 m^(3) blast furnace and was verified via comparison with actual production ***,the effects of the injection rate of hydrogen-rich media,H2 concentration,and oxygen enrichment rate of the blast on the temperature distribution were *** indicated that the increase in the injection rate of the hydrogen-rich media decreased the amount of direct reduction and led to an increase in the furnace ***,an increase in the oxygen enrichment rate led to a decrease in the furnace temperature,but could reduce the solid fuel ratio,while the change in H2 concentration had less effect on the temperature *** combination of hydrogen-rich media injection and the increase in the oxygen enrichment rate would help to adjust the temperature distribution to the same level as the conventional blast furnace conditions.

关键词： Heat distribution blast furnace low-carbon condition Hydrogen enrichment Calculation model

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

Decarbonization options of the iron and steelmaking industry based on a three-dimensional analysis

引用

International Journal of Minerals,Metallurgy and Materials 2023年第2期30卷 388-400页

作者： Xin Lu Weijian Tian Hui Li Xinjian Li Kui Quan Hao Bai Department of Metallurgy Graduate School of EngineeringTohoku UniversitySendai 980-8579Japan School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China China Metallurgical Industry Planning and research Institute(MPI) Beijing 100711China carbon Dioxide research Division CISDI Research&Development Co.Ltd.Chongqing 401122China

Decarbonization is a critical issue for peaking CO_(2) emissions of energy-intensive industries,such as the iron and steel *** decarbonization options of China’s ironmaking and steelmaking sector were discussed based on a systematic three-dimensional low-carbon analysis from the aspects of resource utilization(Y),energy utilization(Q),and energy cleanliness which is evaluated by a process general emission factor(PGEF)on all the related processes,including the current blast furnace(BF)-basic oxygen furnace(BOF)integrated process and the specific sub-processes,as well as the electric arc furnace(EAF)process,typical direct reduction(DR)process,and smelting reduction(SR)*** study indicates that the three-dimensional aspects,particularly the energy structure,should be comprehensively considered to quantitatively evaluate the decarbonization road map based on novel technologies or *** scrap utilization(improvement of Y)and the substitution of carbon-based energy(improvement of PGEF)in particular is *** terms of process scale,promoting the development of the scrap-based EAF or DR-EAF process is highly encouraged because of their lower *** three-dimensional method is expected to extend to other processes or industries,such as the cement production and thermal electricity generation industries.

关键词： peak CO_(2)emission low carbon management decarbonization option energy-intensity industry ironmaking and steelmaking

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

Analysis of Calcined Red Mud Properties and Related Mortar Performances

引用

Fluid Dynamics & Materials Processing 2024年第5期20卷 901-913页

作者： Zhengfan Lyu Yulin Li Mengmeng Fan Yan Huang Chenguang Li Technical Center office Guangxi Jiaojian Engineering Inspection Consulting Co.Ltd.Nanning530001China Technical Center office Guangxi Road Construction Engineering Group Co.Ltd.Nanning530001China Nanning Road Construction Technology and Road Construction Materials Engineering Technology research Centre Guangxi Road Construction Engineering Group Co.Ltd.Nanning530001China

Red mud(RM)is a low-activity industrial solid waste,and its utilization as a resource is currently a hot *** this study,the micro characteristics of red mud at different calcination temperatures were analyzed using X-ray diffraction and scanning electron *** performance of calcined red mud was determined through mortar strength *** indicate that high-temperature calcination can change the mineral composition and microstructure of red mud,and increase the surface roughness and specific surface *** the optimal temperature of 700°C,the addition of calcined red mud still leads to a decrease in mortar strength,but its activity index and flexural coefficient increase by 16.2%and 11.9%with respect to uncalcined red mud,reaching values of 0.826 and 0.974,*** with the control group,the synergistic activation of calcined red mud with slag can increase the compressive and flexural strength of the mortar by 12.9%and 1.5%,reaching 8.7 and 62.4 MPa,***,the activity index and flexural coefficient of the calcined RM and GGBS(Ground Granulated blast furnace Slag)mixtures also increase to 1.015 and 1.130,respectively.

关键词： Red mud slag thermal activation synergistic activation mortar test microscopic properties

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

Probing the Inner Structure of a blast furnace by Cosmic-Ray Muon Radiography

Probing the Inner Structure of a Blast Furnace by Cosmic-Ray...

引用

第五届国际炼铁科技大会

作者： Akihiko Shinotake Shinroku Matsuzaki Kazuya Kunitomo Masaaki Naito Misao Hashimoto Asao Hatanaka Toshihiro Nagane Kanetada Nagamine Hiroyuki Tanaka Environment & Process Technology Center Nippon Steel Corporation Advanced Technology research Laboratories Nippon Steel Corporation Head office Nippon Steel Corporation Oita Works Nippon Steel Corporation

The visualization of the inner state of a blast furnace was investigated by exploiting the feature of cosmic-ray Muon that attenuates according to the density and the thickness of the object through which it penetrates. The distribution of the cosmic-ray Muon accumulated in an object in a blast furnace during a certain period has been determined by a probing system provided with two sets of a pair of panels with plastic scintillation counters segmented in parallel along each direction of both sides. Measurement was performed in the furnace hearth structure that had been taken out after the shutdown of Oita No.2 blast furnace repaired in 2004. The solid angle distribution of the amount of Muon penetration during a certain period was determined by the probing system located on a slant upward from the furnace bottom brick and the remaining iron in the furnace hearth structure. The average density of the object material in each azimuth was calculated on the basis of the accumulation ratio obtained from the relation between the intensity coming from the blast furnace side and that coming from the symmetrically opposite free space side. It was thus confirmed that the calculated average density was distributed according to that of the actual remaining brick and iron. Next, another measurement was performed in the same manner in the renewed furnace hearth of Oita No.2 blast furnace which had just started working after its repairs. The density of the material at the iron-rich portion inside the hearth was estimated from the accumulation ratio obtained from the relation between the intensity of the Muon channel passing through the iron-rich part in the hearth and that passing through its opposite channel symmetric to the coordinate origin. Then, the level of the furnace bottom brick, meaning its eroded thickness, was estimated from those accumulation ratios in relation to each channel crossing both the iron-rich part and the furnace bottom brick. The possibility of the densit

关键词： blast furnace refractory hearth measurement cosmic-ray muon radiography

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Influence of Erosion Induced by NaCl on the Mechanical Performances of Alkali-Activated Mineral Admixtures

引用

Fluid Dynamics & Materials Processing 2023年第9期19卷 2385-2398页

作者： Jing Yu Jie Ren Guangming Shen Weixiang Sun Hui Wang Department of Architectural Engineering Ningbo PolytechnicNingbo315000China Technology and Performance Management Department China Construction Infrastructure Corp.Ltd.Beijing10029China Chief Engineer’s office Jiuzhou Engineering Design Co.Ltd.Zhengzhou451162China School of Civil Engineering and Geographic Environment Ningbo UniversityNingbo315000China

In this paper,the inﬂuence of NaCl freeze-thaw(F-T)cycles and dry-wet(D-W)alternations on theﬂexural,com-pressive and bonding strengths of alkali-activatedﬂy ash(FA)and a blast furnace slag powder(BFS)is *** considered NaCl concentration is 3%.The effect of polypropyleneﬁbers on the mechanical strengths is also *** electron microscopy(SEM),thermogravimetry(TG)and X-ray diffraction(XRD)are selected to discern the mechanisms underpinning the NaCl-induced *** obtained results indicate that the best results in terms of material resistance are obtained with admixtures containing 60%BFS and 40%FA in terms of mass ratio and 3%polypropyleneﬁbers in terms of volume *** maximum rates of decrease of theﬂexural,compressive and bonding strengths after 300 NaCl F-T cycles are 21.5%,20.3%and 22.6%,*** corresponding rates of decrease due to NaCl D-W alternations are 28.1%,26.1%and 31.5%,*** TG curves show that the alkali-activating activity of BFS is higher than that of ***,in theﬁrst case,the microstructure of the hydration products is more *** results also show that NaCl F-T cycles lead to increasing cracks in the alkali-activated BFS.

关键词： Mechanical performances alkali-activated NaCl dry-wet alternations NaCl freeze-thaw cycles microstructure

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

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

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：