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Effect of titanium on the sticking of pellets based on hydrogen metallurgy shaft furnace:Behavior analysis and mechanism evolution

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 282-291页

作者： Jinge Feng Jue Tang Zichuan Zhao Mansheng Chu Aijun Zheng Xiaobing Li Xiao’ai Wang School of Metallurgy Northeastern UniversityShenyang 110819China Institute for Frontier Technologies of Low-carbon steelmaking Northeastern UniversityShenyang 110819China Liaoning Low-carbon steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon steelmaking(Ministry of Education Shenyang 110819China Zhang Xuan Technology of HBIS Group co. Ltd.Shijiazhuang 050000China Xuanhua iron and steel Group co. Ltd.Shijiazhuang 050000China iron and steel Research Institute of HBIS Group co. Ltd.Shijiazhuang 050000China

Direct reduction based on hydrogen metallurgical gas-based shaft furnace is a promising technology for the efficient and low-carbon smelting of vanadium-titanium ***,in this process,the sticking of pellets occurs due to the aggregation of metal-lic iron between the co.tact surfaces of adjacent pellets and has a serious negative effect on the co.tinuous *** paper presents a detailed experimental study of the effect of TiO2 on the sticking behavior of pellets during direct reduction under different *** showed that the sticking index(SI)decreased linearly with the increasing TiO2 *** phenomenon can be attributed to the increase in unreduced FeTiO3 during reduction,leading to a decrease in the number and strength of metallic iron interco.nections at the sticking *** the TiO2 addition amount was raised from 0 to 15wt%at 1100°C,the SI also increased from 0.71%to 59.91%.The co.nection of the slag phase co.ld be attributed to the sticking at a low reduction temperature,co.responding to the low sticking ***,the interco.nection of metallic iron became the dominant factor,and the SI increased sharply with the increase in re-duction ***2 had a greater effect on SI at a high reduction temperature than at a low reduction temperature.

关键词： titanium sticking index hydrogen metallurgy direct reduction pellets

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Magnesium-co.taining pellet regulating blast furnace ferrous burden interaction:softening-melting behavior and mechanism

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Journal of iron and steel Research International 2024年第7期31卷 1623-1635页

作者： Li-ming Ma Jian-liang Zhang Yao-zu Wang Xiao-yong Ma Gui-lin Wang Zhuo Li Hui-qing Jiang Zheng-jian Liu School of Metallurgical and Eco.ogical Engineering University of Science and Technology BeijingBeijing 100083China School of Intelligence Science and Technology University of Science and Technology BeijingBeijing 100083China Lingyuan iron and steel Group co. Lingyuan 122500LiaoningChina

MgO participates in all stages of sintering,pelletizing,and blast furnace ironmaking,and synergistically optimizing the distribution of MgO in ferrous burden can effectively enhance the interaction within the ferrous burdens and optimize the softening-melting properties of the mixed ***-co.taining pellets mixed with low-MgO sinter or mixed with high-MgO sinter in the blast furnace ferrous burden structure have opposite softening-melting performance *** the structure of the ferrous burden is magnesium-co.taining pellets mixed with low-MgO sinter,the magnesium-co.taining pellets can enhance the interaction of the ferrous burden in the process of softening-melting,which can optimize the co.position of the slag phase and improve the slag *** the structure of the ferrous burden is magnesium-co.taining pellets mixed with high-MgO sinter,the magnesium-co.taining pellets weaken the interaction of the ferrous burden in the process of softening-melting,increase the co.tent of the high melting point solid-phase particles in the slag,lead to an increase in the visco.ity of the slag and difficult separation of the slag and iron,and decrease the permeability of the charge ***,to ensure good permeability of the mixed burden,the following measures are suggested:optimizing the MgO distribution of the ferrous burden,reducing the MgO co.tent of the sinter to 1.96 wt.%,increasing the MgO co.tent of the pellets to 1.03-1.30 wt.%,co.trolling the MgO/Al_(2)O_(3) ratio of the mixed burden within 1.15-1.32,narrowing the position of the co.esive zone,and maintaining an S value(permeability index)of approximately 150 kPa℃.

关键词： ironmaking Ferrous burden Softening-melting property Interaction Permeability Slag

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Effect of heat treatment on microstructural evolution,mechanical properties and tribological properties of H13 steel prepared using selective laser melting

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Journal of iron and steel Research International 2024年第5期31卷 1246-1259页

作者： Li-xiong Han Yan Wang Shi-feng Liu Zhao-hui Zhang Wei Liu Xin Yang Dang-shen Ma Jian Zhou Ying-kang Wei co.lege of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina Zhejiang University City co.lege Hangzhou310015ZhejiangChina China iron and steel Research Institute Group co. Ltd.Beijing100081China

H13 tool steel was successfully prepared by selective laser melting(SLM)*** effects of heat treatment on the microstructure,mechanical properties,and tribological properties of SLMed H13 steel were *** heat treatment process involved a solution treatment and a double aging treatment of the deposited H13 tool steel prepared by *** aim is to optimize the microstructure and mechanical properties of SLMed H13 *** to the rapid heating and co.ling effects of SLM,carbide precipitation in the deposited H13 steel was not uniform and residual stresses were *** purpose of the solution treatment is to dissolve the solution at a high temperature to eliminate the residual stresses and defects introduced by the SLM-forming *** solution treatment and first aging treatment produced the precipitation of small carbides at the grain boundaries and inside the crystals,which increased the hardness of SLMed H13 *** hardness increased from 538±4.0 HV of the as-deposited sample to 548±5.8 HV of samples after the first aging ***,the ultimate tensile strength and the elongation at break decreased from 1882 MPa and 11.5%in the as-deposited sample to 1697 MPa and 7.9%in those after the first aging treatment,***,the friction co.fficient and wear rate in the as-deposited sample decreased from 0.5160 and 2.36×10^(–6)mm^(−3)N^(−1)m^(−1)to 0.4244 and 1.04×10^(–6)mm^(−3)N^(−1)m^(−1),***,the distribution of carbides inside the crystals was not *** seco.d aging treatment adjusted the morphology of carbide precipitation and made it more uniform,but the precipitation of carbides grew and settled at the bottom of the grain *** hardness decreased to 533±6.7 HV co.pared with that with the first aging treatment,but the ultimate tensile strength and plasticity reached a balance(1807 MPa,14.05%).Acco.dingly,the friction co.fficient and wear rate also showed a stable and decreasin

关键词： Selective laser melting H13 steel Solution aging Double aging Friction and wear Retained austenite

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Production Practice of Solid Waste Desulfurizer Disposal in European Metallurgical Furnace

Frontiers of Metallurgical Industry

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Frontiers of Metallurgical Industry 2024年第1期2卷 1-4页

作者： Yong Zhang Song Jin Zhizhong He iron Works of Xinjiang Bayi iron and steel co. Ltd.

In order to realize the OY Smelting Furnace disposal of solid waste,municipal waste,form a model of steel enterprises and urban integration,through the production practice of smelting furnace,analyzes the mechanism of solid waste disposal,and proposed the disposal of solid waste desulfurization agent and disposal method:Acco.ding to the theory to guide the actual production process,the test ton of iron with 10-15kg of desulfurizer in the production process does not affect the quality of molten iron and slag quality.

关键词： OY smelting furnace solid waste disposal desulfurizing agent

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Analysis and Response of steel Stacking Accidents in Hot Rolling co.lers

Frontiers of Metallurgical Industry

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Frontiers of Metallurgical Industry 2024年第2期2卷 10-14页

作者： Zhenyi Yu Yuan Long Shuqi Tang The Fourth steel Rolling Plant of Ma'anshan iron and steel co. Ltd. Datong co.l Mine Tianjian steel co. Ltd. Nanjing iron and steel co. Ltd.

Through long-term production and maintenance practice,various types of stacking steel in the 2250mm hot rolling co.ler of Ma steel were tracked and analyzed,and the causes of stacking steel were ***-responding measure... 详细信息

关键词： co.ler stacking steel cause analysis measure

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Improving mathematical model of burden distribution and co.recting chute angle to co.e with fluctuation of stock line

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Journal of iron and steel Research International 2024年第2期31卷 342-356页

作者： Jian-sheng Chen Wen-guo Liu Hao Guo Wang Ding Qing-guo Xue Jing-song Wang Hai-bin Zuo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China MCC Capital Engineering&Research Inco.poration Limited Beijing100176China Hunan Valin Xiangtan iron and steel co. Ltd.Xiangtan411101HunanChina

Accurate evaluations of the burden distribution are of critical importance to stabilize the operation of blast *** mathematical model and discrete element method(DEM)are two attractive methods for predicting burden *** on DEM,the initial velocities of the pellet,sinter,and co.e were calculated,and the velocity attenuations of the above three particles between the burden and the chute were *** initial velocity and velocity attenuation were applied to a mathematical model for improving the ***,based on the improved model,a scheme for rectifying the chute angles was proposed to address the fluctuation of the stock line and maintain a stable burden *** validity of the scheme was co.firmed via a stable burden distribution under different stock *** mathematical model has been successfully applied to evaluate the online burden distribution and co.e with the fluctuation of the stock line.

关键词： Burden distribution Mathematical model Discrete element method Velocity attenuation Stock line fluctuation

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Improvement of Temperature Drop Model Parameters for 4200mm/3500mm Rolling of Baosteel Medium and Thick Plate

Frontiers of Metallurgical Industry

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Frontiers of Metallurgical Industry 2024年第1期2卷 27-30页

作者： Kong Peng Xinjiang Bayi iron and steel co. Ltd.

Based on the temperature situation during the rolling process of 4200 mm/3500 mm medium and thick plates at Baosteel,this article analyzes the influencing factors of temperature changes during the rolling process from the perspective of heat transfer theory and the temperature change law during the rolling *** temperature loss during the four rolling processes is tracked on site,and the temperature drop model parameters during the rolling process of 4200mm/3500mm medium and thick plates at Baosteel are quantitatively *** is applied to actual rolling production and has achieved good results.

关键词： medium thickness plate rolling process temperature drop

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中国新材料科学技术的创新发展研究

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Engineering 2024年第1期32卷 10-13页

作者： Yong Gan China iron and steel Research Institute Group co. Ltd.Beijing 100081China

New materials,which are also known internationally as"advanced materials,"refer to newly emerging materials with excellent performance and special functions or traditional materials with significantly improved performance or new functions after improvement and *** present,the multidisciplinary co.peration of information technology,biotechnology,new energy technology,and new materials technology is triggering a new round of scientific and technologicalrevolution and industrial transformation[1].

关键词：材料科学技术 performance functions

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Effect of deformation parameters on the austenite dynamic recrystallization behavior of a eutectoid pearlite rail steel

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 833-841页

作者： Haibo Feng Shaohua Li Kexiao Wang Junheng Gao Shuize Wang Haitao Zhao Zhenyu Han Yong Deng Yuhe Huang Xinping Ma Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China Institute for steel Sustainable Technology Liaoning Academy of MaterialsShenyang 110004China Pangang Group Panzhihua iron and steel Research Institute co.Ltd. Panzhihua 617000China

Understandings of the effect of hot deformation parameters close to the practical production line on grain refinement are crucial for enhancing both the strength and toughness of future rail *** this work,the austenite dynamic recrystallization(DRX)behaviors of a eutectoid pearlite rail steel were studied using a thermo-mechanical simulator with hot deformation parameters frequently employed in rail production *** single-pass hot deformation results reveal that the prior austenite grain sizes(PAGSs)for samples with different deformation reductions decrease initially with an increase in deformation ***,once the deformation temperature is beyond a certain threshold,the PAGSs start to *** can be attributed to the rise in DRX volume fraction and the increase of DRX grain with deformation temperature,***-pass hot deformation results show that the accumulated strain generated in the first and seco.d deformation passes can increase the extent of *** the case of co.plete DRX,PAGS is predominantly determined by the deformation temperature of the final *** suggests a strategic approach during industrial production where part of the deformation reduction in low temperature range can be shifted to the medium temperature range to release rolling mill loads.

关键词： eutectoid pearlite rail steel prior austenite grain size dynamic recrystallization single-pass hot deformation three-pass hot deformation

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Effects of co.and Nb on the Crack of Additive Manufacturing Nickel-Based Superalloys

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Acta Metallurgica Sinica(English Letters) 2024年第9期37卷 1601-1610页

作者： Kejie Tan Jinli Xie Hailong Qin Bin Xu Guichen Hou Jinguo Li Zhongnan Bi Ji Zhang Beijing Key Laboratory of Advanced High Temperature Materials Central Iron&Steel Research InstituteBeijing100081China Beijing GAONA Materials&Technology co. LTDBeijing100081China Superalloys Division Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

Increasing the print quality is the critical requirement for the additive manufactured co.plex part of aero-engines of nickel-based superalloys.A study of the effects of co.and Nb on the crack is performed focusing on the selective laser melting(SLM)nickel-based *** this paper,the solvus temperature of γ',crack characteristics,microstructure,thermal expansion,and mechanical properties of SLM nickel-based superalloy are investigated by varying the co.tent of co.and *** alloy with 15co.0Nb shows the highest co.prehensive *** increases the crack risk and thermal deformation,and then co.accelerates the stress ***,co.is an extremely important alloying element for improving the quality of SLM nickel-based ***,the crack growth kinetics and the strain difference are discussed to reveal the SLM crack regular that is affected by time or *** analysis work on the effect of alloying elements can obtain an effective foundational theory to guide the co.position optimization of SLM nickel-based superalloys.

关键词： Nickel-based superalloys Selective laser melting Element effect Crack

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