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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang Xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng Xu school of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent LiCoO_(2)cathode material

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International Journal of Minerals,metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie Shi Changle Hou Jingjing Dong Dong Chen Jianzhong Li Key Laboratory for Ecological metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China school of metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(LIBs),properly recycling spent LIBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of LIB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to LiCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/LiCoO_(2)mass ratio of 3:1,the leaching efficiency of Li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in LiCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of LIB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

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Preparation of FeCoNi medium entropy alloy from Fe^(3+)-Co^(2+)-Ni^(2+)solution system

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International Journal of Minerals,metallurgy and Materials 2025年第1期32卷 92-101页

作者： Zongyou Cheng Qing Zhao Mengjie Tao Jijun Du Xingxi Huang Chengjun Liu Key Laboratory for Ecological metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China school of metallurgy Northeastern UniversityShenyang 110819China engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education) Shenyang 110819China

In recent years,medium entropy alloys have become a research hotspot due to their excellent physical and chemical *** controlling reasonable elemental composition and processing parameters,the medium entropy alloys can exhibit similar properties to high entropy alloys and have lower *** this paper,a FeCoNi medium entropy alloy precursor was prepared via sol-gel and coprecipitation methods,respectively,and FeCoNi medium entropy alloys were prepared by carbothermal and hydrogen *** phases and magnetic properties of FeCoNi medium entropy alloy were *** showed that FeCoNi medium entropy alloy was produced by carbothermal and hydrogen reduction at 1500℃.Some carbon was detected in the FeCoNi medium entropy alloy prepared by carbothermal *** alloy prepared by hydrogen reduction was uniform and showed a relatively high ***,the hydrogen reduction product exhibited better saturation magnetization and lower coercivity.

关键词： medium entropy alloy sol-gel co-precipitation carbothermal hydrogen reduction

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Study on Improving Solidification Structure of Rare Earth Al-Si Alloys with Electropulse Acting on Liquid Alloy

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Journal of Rare Earths 2004年第z1期22卷 49-52页

作者： Cui Heng Cang Daqiang Zong Yanbing Li Lingzhen He Peng Mo Zhiying school of metallurgy and ecology engineering University of Science and Technology BeijingBeijing 100083 China School of Metallurgy and Ecology Engineering University of Science and Technology BeijingBeijing 100083 China School of Metallurgy and Ecology Engineering University of Science and Technology BeijingBeijing 100083 China School of Metallurgy and Ecology Engineering University of Science and Technology BeijingBeijing 100083 China School of Metallurgy and Ecology Engineering University of Science and Technology BeijingBeijing 100083 China School of Metallurgy and Ecology Engineering University of Science and Technology BeijingBeijing 100083 China

Electropulse modification (EPM) process, a new physical field method for improving the solidification structure of metals was *** from other research, EPM is only acting pulse current on melt under liquid *** solidification structure of Al-Si alloys, A1-Cu alloys,cast iron and steel can be modified obviously with this method: the solidification structure of ZL101 alloy presented the Na and Sr modification and the mechanical properties were enhanced; a large number of primary silicon appeared in the microstructure of ZL109 alloy; the equiaxed grain zone was expanded and the grains were fined in Al-5.0wt% Cu alloy; the graphitization took place in solidification process of molten cast iron; the grain sizes of solidification structure of T8 steel were reduced significantly and the shape of steel pearlites also changed; the equiaxed grain zone increased to 88% from original untreated 19%, the equiaxed grains were fined and the intercrystalline crack was avoided in concasting billet by continuously treating liquid electrical sheet steel in *** of rare earths on casting Al-Si alloys were also *** method of modifying the solidification structure of rare earth Al-Si alloys with EPM in producing the alloys was proposed.

关键词： electropulse modification Al-Si alloy solidification structure rare earths

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Influence of introducing Zr,Ti,Nb and Ce elements on externally solidified crystals and mechanical properties of high-pressure die-casting Al–Si alloy

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International Journal of Minerals,metallurgy and Materials 2025年第1期32卷 147-153页

作者： Junjie Li Wenbo Yu Zhenyu Sun Weichen Zheng Liangwei Zhang Yanling Xue Wenning Liu Shoumei Xiong Center of Materials Science and engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Traffic&Transportation engineering Central South UniversityChangsha 410075China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China school of Materials Science and engineering Tsinghua UniversityBeijing 100084China

High pressure die casting(HPDC)AlSi10Mn Mg alloy castings are widely used in the automobile *** can optimize the mechanical properties of castings through heat treatment,while the release of thermal stress arouses the deformation of large integrated ***,the development of non-heat treatment Al alloys is becoming the hot *** addition,HPDC contains externally solidified crystals(ESCs),which are detrimental to the mechanical properties of *** achieve high strength and toughness of non-heat treatment die-casting Al-Si alloy,we used AlSi9Mn alloy as matrix with the introduction of Zr,Ti,Nb,and *** influences on ESCs and mechanical properties were systematically investigated through three-dimensional reconstruction and thermodynamic *** results reveal that the addition of Ti increased ESCs'size and porosity,while the introduction of Nb refined ESCs and decreased ***,large-sized Al_3(Zr,Ti)phases formed and degraded the mechanical *** introduction of Ce resulted in the poisoning effect and reduced mechanical properties.

关键词： aluminium alloy high-pressure die-casting externally solidified crystals non-heat treatment

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Quickly obtaining densely dispersed coherent particles in steel matrix and its related mechanical property

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International Journal of Minerals,metallurgy and Materials 2025年第1期32卷 111-118页

作者： Xiaoxiao Wang Qingsong Huang school of Chemical engineering Sichuan UniversityChengdu 610065China

Densely distributed coherent nanoparticles(DCN)in steel matrix can enhance the work-hardening ability and ductility of steel *** the routes to this end can be generally classified into the liquid-solid route and the solid-solid ***,the formation of DCN structures in steel requires long processes and complex *** far,obtaining steel with coherent particle enhancement in a short time remains a bottleneck,and some necessary steps remain ***,we show a high-efficiency liquid-phase refining process reinforced by a dynamic magnetic ***-Y-Mn-O particles had an average size of around(3.53±1.21)nm and can be obtained in just around 180 *** small nanoparticles were coherent with the matrix,implying no accumulated dislocations between the particles and the steel *** findings have a potential application for improving material machining capacity,creep resistance,and radiation resistance.

关键词： ferritic steels coherent particles microstructure compression test work hardening

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Endpoint temperature prediction of molten steel in RH using improved case-based reasoning

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International Journal of Minerals,metallurgy and Materials 2013年第12期20卷 1148-1154页

作者： Kai Feng Hong-bing Wang An-jun Xu Dong-feng He school of metallurgy and ecology engineering University of Science and Technology Beijing State Key Laboratory of Advanced metallurgy University of Science and Technology Beijing school of Computer and Communication engineering University of Science and Technology Beijing

An improved case-based reasoning （CBR） method was proposed to predict the endpoint temperature of molten steel in Ruhrstahl Heraeus （RH） process. Firstly, production data were analyzed by multiple linear regressions and a pairwise comparison matrix in analytic hierarchy process （AHP） was determined by this linear regression＇s coefficient. The weights of various influencing factors were obtained by AHP. Secondly, the dividable principles of case base including ＂0-1＂ and ＂breakpoint＂ were proposed, and the case base was divided into several homogeneous parts. Finally, the improved CBR was compared with ordinary CBR, which is based on the even weight and the single base. The results show that the improved CBR has a higher hit rate for predicting the endpoint temperature of molten steel in RH.

关键词： steelmaking degassing case-based reasoning analytic hierarchy process temperature prediction

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Electrochemical behavior of chalcopyrite in presence of Thiobacillus ferrooxidans

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中国有色金属学会会刊：英文版 2006年第5期16卷 1240-1244,F0003页

作者：李宏煦邱冠周胡岳华苍大强王淀佐 school of metallurgy and ecology engineering University of Science and TechnologyBeijing Key Laboratoryof Ecological and Recycling metallurgy Ministry of EducationBeijing 100083China school of Resources Processing and Bioengineering Central South University

The chalcopyrite anode dissolution behavior in the presence or absence of bacteria in 9 K media using bacteria modified powder microelectrode at 30 ℃ was studied. It is found that during the anode dissolution, many intermediate transient reactions occur accompanying with the production of chalcocite and covellite at potential between - 0.075 V and - 0.025 V (vs SCE). At low scanning potentialbetween - 0.1 and - 0.250 V, the iron ion is released in ferrous form, but at the relative high potentialup to 0.7 V, it is the ferric one. The presence of Thiobacillus ferrooxidans makes peak current increase and the initial peak potential negatively move, hinting the decomposed oxidation reaction easily occurred and especially the iron ion released and ferrous oxidation reaction enhanced. The characteristic at potential between - 0.75 and - 0.5 V demonstrates the Thiobacillus ferrooxidans also contributes to the element sulfur formed on the oxidation surface and removed during anode process. The added ferric in the cell could enhance the dissolution reaction, while the increased acid under pH=2 might slightly hamper the process. The anode dissolution kinetics studies show that the presence of bacteria could decease corrosion potential from 0.238 V to 0.184 V and increase the corrosion current density from 1.632 14×10- A/cm2 to 2.374 11×10- A/cm2.

关键词：生物浸取阳极氧化细菌冶金粉末微电极黄铜矿动力学

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Inclusion Composition Control During LF Refining for SPCC Using FactSage Combined With Industrial Trials

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Journal of Iron and Steel Research International 2013年第2期20卷 14-20页

作者： CHENG Zi-jian GUO Jing CHENG Shu-sen State Key Laboratory of Advanced metallurgy School of Metallurgy and Ecology Engineering University of Science and Technology Beijing Hongxing Iron and Steel Co Ltd

Steel plate cold common （SPCC） is a Al-killed steel with Ca-treatment. The control of Al2O3 inclusion into low melting point liquid region is beneficial for inclusion removal, cast-ability promotion and defects reduction during rolling. Thus it is essential to understand steel-inclusion equilibrium since inclusion composition is determined by composition of liquid steel directly through steel-inclusion reaction. Thermodynamic calculation software FactSage is performed to understand how to control inclusion composition during ladle furnace （LF） refining, and industrial trials are carried out to verify calculated results. Firstly, target region for controlling CaO-Al2O3-MgO ternary inclusion is analyzed on the basis of the ternary phase diagram and the relationship between activities related to pure solid and activities related to pure liquid was fixed by thermodynamic analysis in order to obtain reliable activities for components of inclusions in the target region by FactSage. In addition, inclusions in steel samples are detected by scanning electron microscopy （SEM） combined with energy dispersive spectroscopy （EDS）. It is found that most of Al2O3 inclusions are modified into lower melting point region but a number of them are still located in high melting point region at the end of LF refining after Ca-treatment. Moreover, the composition of liquid steel equilibrating with liquid CaO-Al2O3-MgO inclusion is obtained by steel-inclusion equilibrium calculation when w[Al]s is approximating 0.03% as： a[O] is 1.0×10-6 to 4.0×10-6, w[Ca] is 20×10-6 to 50×10-6 and w[Mg] is 0.1×10-6 to 3.0×10-6. At last, stability diagrams of various calcium aluminates and CaS are established and they show that liquid calcium aluminate inclusions form when w[Ca] is more than 20×10-6, but CaS precipitation is difficult to prevent because sufficiently low w[S] （〈0.003%） is required.

关键词： LF refining inclusion control steel-inclusion equilibrium FactSage

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Design and optimization of carbon materials as anodes for advanced potassium-ion storage

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Rare Metals 2024年第11期43卷 5516-5548页

作者： Xiang Liu Jian-Hua Chu Zi-Xian Wang Shao-Wei Hu Zi-Yi Cheng Ke-Ning Liu Chao-Jie Zhang Li-Qiang Zhang Li-Dong Xing Wei Wang school of Metallurgical engineering Anhui University of TechnologyMaanshan 243032China school of metallurgy and ecology University of Science and Technology BeijingBeijing 100083China

With the swift advancement of renewable energy and escalating demands for energy storage,potassium-ion batteries(PIBs)are increasingly recognized as a potent energy storage techn *** carbon anode materials have been utilized for PIBs anodes owing to their superior K^(+)storage capacity,outstanding cycling performance,elevated capacity,and ***,it is imperative to explore and improve carbon anode *** review meticulously encapsulates the recent scholarly advancements in carbon anode materials for *** elucidates the operational mechanisms of carbon anode for PIBs,provides a synopsis of diverse carbon materials,and deliberates on the prevalent challenges,including cycling stability and potassium-ion diffusion *** soft and hard carbon augmented potassiumion capacities,the expansive surface areas coupled with the large ionic radius of K^(+)pose substantial challenges to their structural design and ***,this review outlines strategic approaches to the design of carbon materials for excellent potassium storage performance,including the expansion of interlayer spacing,modification of morphology,heteroatom doping,structural defect regulation,incorporation of porous structures,and development of carbon-carbon ***,the challenges and prospective solutions of carbon anode materials for PIBs with superior energy density and cycling stability were proposed,providing a reasonable guidance for regulation design of carbon materials.

关键词： Potassium-ion batteries Carbon anode Storage mechanism Optimization strategies Electrochemical performance

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