Metallurgical and Materials Transactions B最新文献_第6页

Electrochemical Extraction of Fe–Si Alloy Form SiO2–CaO–CaF2–FeOx Slags by Molten Oxide Electrolysis 用熔融氧化物电解法电化学提取 SiO2-CaO-CaF2-FeOx 熔渣中的铁硅合金

Metallurgical and Materials Transactions B Pub Date : 2024-08-05 DOI: 10.1007/s11663-024-03225-9

Xu Zhang, Liqi Zhang, Bowen Huang, Yusheng Yang, Zengwu Zhao

{"title":"Electrochemical Extraction of Fe–Si Alloy Form SiO2–CaO–CaF2–FeOx Slags by Molten Oxide Electrolysis","authors":"Xu Zhang, Liqi Zhang, Bowen Huang, Yusheng Yang, Zengwu Zhao","doi":"10.1007/s11663-024-03225-9","DOIUrl":"https://doi.org/10.1007/s11663-024-03225-9","url":null,"abstract":"Materials like metallic iron and its alloys are essential to daily living and industrial production. The benefits of using electrolysis technology to prepare iron and its alloys are great efficiency, controllability, and environmental protection. This study focuses on the feasibility of the electrochemical method for the direct preparation of metallic iron and Si–Fe alloys in iron ores with high fluoride content. The electrochemical behavior of Fe(II) and Fe(III) in molten SiO2–CaO–CaF2 slag on tungsten electrodes was investigated by using cyclic voltammetry and square wave voltammetry methods. It was determined that the reduction of Fe(II) ions follows a one-step two-electron transfer process: Fe(II) + 2e− → Fe(0). The reduction of Fe(III) involves a two-step electron transfer process: Fe(III) + e− → Fe(II) and Fe(II) + 2e− → Fe(0), respectively. The Fe(II)/Fe(0) process is an irreversible reaction controlled by diffusion. The diffusion coefficient of Fe(II) is DFe(II) = 1.5 × 10−6 cm2 s−1. The cathodic deposits of iron were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) combined with energy dispersive X-ray spectroscopy (EDS). The findings indicate that the production of Fe2Si alloy through electrolysis is more favorable when Fe(II) is present in the slag, while the production of metallic iron is more favorable when Fe(III) is present in the slag. This work provides a basis for the electrochemical direct preparation of Fe–Si alloy and metallic iron in high fluorine iron ore.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"193 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Remelting Model and Cracking Criterion for Vacuum Arc Remelting of Superalloys: Taking IN718 as an Example 超合金真空电弧重熔的重熔模型和裂纹标准：以 IN718 为例

Metallurgical and Materials Transactions B Pub Date : 2024-08-02 DOI: 10.1007/s11663-024-03222-y

Hengnian Zhang, Xin Li, Tao Zhang, He Jiang, Zhihao Yao, Jianxin Dong

{"title":"Remelting Model and Cracking Criterion for Vacuum Arc Remelting of Superalloys: Taking IN718 as an Example","authors":"Hengnian Zhang, Xin Li, Tao Zhang, He Jiang, Zhihao Yao, Jianxin Dong","doi":"10.1007/s11663-024-03222-y","DOIUrl":"https://doi.org/10.1007/s11663-024-03222-y","url":null,"abstract":"To enhance the quality of vacuum arc remelting (VAR) ingots in enterprises, a remelting model and cracking criterion was developed based on simulation and a series of designed experiments to predict the segregation behavior, shrinkage cavity, thermal stress, and cracking tendency of VAR ingot. The remelting model was established by MeltFlow-VAR and Abaqus software. As MeltFlow-VAR cannot calculate the stress, through the secondary development program, the thermal stress of VAR ingot was calculated by introducing the temperature field of VAR process into Abaqus. This model was verified by longitudinal dissection of a 406 kg IN718 alloy VAR ingot. The simulated evolution of molten pool, shrinkage cavity, freckle formation probability and secondary dendrite arm spacing (SDAS) align consistently with the ingot microstructure and experimental results. Combined with thermal stress, the alloy strength at different temperature during cooling and solidification, and failure criterion, a crack criterion was constructed to predict the cracking tendency. Calculating the complete solidification time and cracking tendency of the VAR ingot after melting allows for the determination of the safe demolding time without cracks. This method can be used to explore the effect of different melting parameters, optimize VAR process and improve the quality of VAR production.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-Situ Observation of the Multi-phase Transition and Microstructure Evolution of 22MnB5 Steel 原位观测 22MnB5 钢的多相转变和显微结构演变

Metallurgical and Materials Transactions B Pub Date : 2024-08-02 DOI: 10.1007/s11663-024-03223-x

Ce Liang, Guangxin Song, Wanlin Wang, Jie Zeng

{"title":"In-Situ Observation of the Multi-phase Transition and Microstructure Evolution of 22MnB5 Steel","authors":"Ce Liang, Guangxin Song, Wanlin Wang, Jie Zeng","doi":"10.1007/s11663-024-03223-x","DOIUrl":"https://doi.org/10.1007/s11663-024-03223-x","url":null,"abstract":"An experimental investigation was conducted to elucidate the impact of cooling rate on the microstructure evolution of boron-containing steel 22MnB5 by in-situ observation using the confocal laser scanning microscope (CLSM). The observations manifested distinct multi-phase formation of reconstructive grain boundary allotriomorphic ferrite (GBA) and pearlite (P) to sympathetic intergranular acicular ferrite (IAF) and bainite (B), as well as the displacive martensite (M) under different predefined cooling rates (1, 10, and 20 °C/s). Notably, as the cooling rate escalated from 1 to 10 or 20 °C/s, the starting and finishing phase transition temperature decreased significantly. For the 22MnB5 steel cooled at 1 °C/s, the solid phase transition sequence followed γ→GBA→P→IAF, while for the steel cooled at 10 and 20 °C/s, the transition sequence shifted to γ→B→M. Additionally, in the sample cooled at 20 °C/s, the bainite lath spacing reduced and more small size martensite appeared as the mechanical stabilization of austenite. Simultaneously, the dislocation density increased compared to the slow cooled samples, primarily due to the elevated nucleation rate from austenite to ferrite and larger internal stress induced by the enhancing cooling intensity.<h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Investigation of the Coupled Effect of H/D Ratio and Effective Volume on Optimized Blast Furnace Profile 高/低比和有效容积对优化高炉炉型的耦合效应的数值研究

Metallurgical and Materials Transactions B Pub Date : 2024-08-02 DOI: 10.1007/s11663-024-03218-8

Junjie Li, Lulu Jiao, Shibo Kuang, Ruiping Zou, Wenqi Zhong, Aibing Yu

{"title":"Numerical Investigation of the Coupled Effect of H/D Ratio and Effective Volume on Optimized Blast Furnace Profile","authors":"Junjie Li, Lulu Jiao, Shibo Kuang, Ruiping Zou, Wenqi Zhong, Aibing Yu","doi":"10.1007/s11663-024-03218-8","DOIUrl":"https://doi.org/10.1007/s11663-024-03218-8","url":null,"abstract":"The design and optimization of blast furnace (BF) profiles generally rely on limited empirical knowledge and experience. Such exercise can now be improved by means of process modeling and optimization. In this work, the effect of furnace profile on BF performance is numerically investigated across a wide range of furnace volumes (500 to 6000 m3), focusing on the ratio of effective height to belly diameter (H/D ratio). This is done based on the recently developed 3D multi-fluid BF process model. The results indicate that the optimized H/D ratio under different furnace volumes can be determined by minimizing the total energy consumption, namely, the summation of chemical and physical energy consumptions. Comparative analysis indicates that the industrial data on the variation of H/D ratio with furnace volume, collected over years, can be reproduced quantitatively by the current model. The increase in BF size or volume results in high thermal energy efficiency and low coke rate, primarily attributed to the reduced heat dissipation from the top gas and furnace wall. But there exists a size threshold between small and large BFs, approximately 2000 m3 under the conditions considered. Beyond this threshold, the BF performance and in-furnace states do not change significantly. Optimum BF profile needs to consider the coupled effect of H/D ratio and effective furnace volume.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Simulation of Multi-physics Characteristics in Tundish with Channel Induction Heating 带通道感应加热装置的外容器中多物理特性的数值模拟

Metallurgical and Materials Transactions B Pub Date : 2024-07-31 DOI: 10.1007/s11663-024-03211-1

Bin Yang, Shifu Chen, Hong Lei, Dazhao Gou

{"title":"Numerical Simulation of Multi-physics Characteristics in Tundish with Channel Induction Heating","authors":"Bin Yang, Shifu Chen, Hong Lei, Dazhao Gou","doi":"10.1007/s11663-024-03211-1","DOIUrl":"https://doi.org/10.1007/s11663-024-03211-1","url":null,"abstract":"To investigate the qualitative and quantitative effects of flow rate on fluid dynamics within a tundish using channel induction heating, a mathematical model was developed to reflect the macroscopic transport phenomena. The simulation results show that as inlet velocities increased from 0.3 to 0.9, the ratios of plug zone volume to total volume, dead zone volume to total volume, plug zone to dead zone, and plug zone to mixed zone consistently fell within the ranges of 0.257 to 0.263, 0.118 to 0.119, 2.152 to 2.231, and 0.412 to 0.427. Concurrently, the inclusion removal rate in the tundish's dead zone under channel induction heating increased with the inlet velocity. Additionally, analysis of the mean characteristics in the tundish system reveals that the mean residence time linearly decreases with increasing mean flow temperature and linearly increases with the inlet velocity. Furthermore, the inclusion removal rate linearly increases with the inlet velocity. This work enables precise quantitative and qualitative predictions and analyses of physical parameters in the electromagnetic induction heating tundish at various casting speeds, providing an efficient method for evaluating and optimizing the multi-physical fields within the metallurgical container.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Mold Oscillation on Multiphase Flow and Slag Entrainment in a Slab Continuous Casting Mold 模具摆动对板坯连铸模中多相流和熔渣夹带的影响

Metallurgical and Materials Transactions B Pub Date : 2024-07-29 DOI: 10.1007/s11663-024-03219-7

Fu Zheng, Wei Chen, Lifeng Zhang

{"title":"Effect of Mold Oscillation on Multiphase Flow and Slag Entrainment in a Slab Continuous Casting Mold","authors":"Fu Zheng, Wei Chen, Lifeng Zhang","doi":"10.1007/s11663-024-03219-7","DOIUrl":"https://doi.org/10.1007/s11663-024-03219-7","url":null,"abstract":"In the current study, a three-dimensional mathematical model that integrated the large eddy simulation (LES) turbulent model, volume of fluid (VOF) multiphase model, and the dynamic mesh model, was developed to investigate the influence of the mold oscillation on the steel, slag, and air multiphase flow and the slag entrainment in a slab continuous casting mold. The results indicated that the mold oscillation led to an increase of about 0.35 m/s in the speed of molten steel at the impact point of the upper and lower circulation on the narrow surface. However, it reduced about 0.047 m/s in the maximum speed of the meniscus at 1/4 width of the mold. The Fast Fourier Transform (FFT) analysis revealed that the characteristic frequency of the speed fluctuation in the gravity direction of the meniscus near the narrow surface was 1.27 Hz without the consideration of the mold oscillation. Upon the application of the mold oscillation, a new characteristic frequency of 3 Hz, matching the mold oscillation frequency, emerged with twice the intensity of the original 1.27 Hz frequency. Moreover, the mold oscillation had little effect on the characteristic frequency of the speed fluctuation on the meniscus far away from the narrow surface. A user-defined function (UDF) was employed to quantify the number, size, and spatial distribution of entrained slag droplets. The net slag entrainment rate was reduced from 0.0152 to 0.0113 kg/s after the consideration of the mold oscillation, and the number of entrained slag droplets was also decreased. The effect of mold oscillation on the size distribution of entrained slag droplets and the occurrence location of the slag entrainment on the meniscus were not significant.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of the Al2O3 Content and MgO/Al2O3 Ratio on the Viscosity and Structure of CaO–SiO2–MgO–Al2O3-Based Furnace Slag with CaO/SiO2 = 1.2 Al2O3 含量和 MgO/Al2O3 比对 CaO-SiO2-MgO-Al2O3 基 CaO/SiO2 = 1.2 炉渣粘度和结构的影响

Metallurgical and Materials Transactions B Pub Date : 2024-07-29 DOI: 10.1007/s11663-024-03220-0

Jianwei Song, Lei He, Tu Hu, Tingting Lv, Li Gao

{"title":"Effect of the Al2O3 Content and MgO/Al2O3 Ratio on the Viscosity and Structure of CaO–SiO2–MgO–Al2O3-Based Furnace Slag with CaO/SiO2 = 1.2","authors":"Jianwei Song, Lei He, Tu Hu, Tingting Lv, Li Gao","doi":"10.1007/s11663-024-03220-0","DOIUrl":"https://doi.org/10.1007/s11663-024-03220-0","url":null,"abstract":"The effects of the Al2O3 content and MgO/Al2O3 ratios on the structure and viscosity of CaO–SiO2–MgO–Al2O3 silicate-based slag were studied by the rotating cylinder method. The evolution of the silicate structure was analyzed by Fourier transform infrared spectroscopy. The results show that when the CaO/SiO2 ratio is 1.20 and the MgO content is 10 mass pct, the Si–O–Al structure and [AlO4]5− tetrahedron structure of the slag increase with increasing Al2O3 content (17 to 22 pct), which increases the viscosity, break-point temperature, and activation energy of the slag. In addition, when the CaO/SiO2 ratio is 1.20 and the Al2O3 content is 18, 20, and 22 mass pct, respectively, with the increase of MgO/Al2O3 ratio in the range of 0.4 to 0.7, the viscosity, break-point temperature, and activation energy of slag decrease. The analysis of the Raman spectra in the 800 to 1200 cm−1 range indicates that complex silicate structures ([Si2O5]2−, [Si2O6]4−) disaggregate into simpler structures ([Si2O7]6− and [SiO4]4−) with the MgO/Al2O3 ratio increase. The proportion of structural units Q3 and Q2 decreases, the proportion of Q1 and Q0 increases, and the proportion of silicate structural units (Q0 + Q1)/(Q2 + Q3) increases, which indicates that the non-bridging oxygen content in the slag increases, resulting in a decrease in slag polymerization.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sticking in Shaft Furnace and Fluidized Bed Ironmaking Processes: A Comprehensive Review Focusing on the Effect of Coating Materials 竖炉和流化床炼铁工艺中的粘结现象：以涂层材料的影响为重点的综合评述

Metallurgical and Materials Transactions B Pub Date : 2024-07-26 DOI: 10.1007/s11663-024-03188-x

Rou Wang, Suneeti Purohit, Khadijeh Paymooni, Tom Honeyands

{"title":"Sticking in Shaft Furnace and Fluidized Bed Ironmaking Processes: A Comprehensive Review Focusing on the Effect of Coating Materials","authors":"Rou Wang, Suneeti Purohit, Khadijeh Paymooni, Tom Honeyands","doi":"10.1007/s11663-024-03188-x","DOIUrl":"https://doi.org/10.1007/s11663-024-03188-x","url":null,"abstract":"Production of direct reduced iron (DRI), particularly with green hydrogen, is a key pathway to the decarbonization of the iron and steel industry. However, the sticking tendency during the production of DRI creates serious operational issues and limits production outputs. Coating inert materials on the surface of iron ores can act as a barrier to effectively prevent the bonding between newly formed iron surfaces, and can interfere with the formation of iron whiskers. However, the principle of coating has not been systematically studied. This review covers the mechanism of sticking in both shaft furnaces and fluidized bed-based gaseous DRI production. The factors that influence the reduction kinetics and morphology, including physical and chemical ore properties, pellet induration conditions, and reduction conditions are summarized as well. Understanding the relationship between these factors and morphology change is critical to eliminating the sticking issues of DRI. Findings from this study suggest that coating with inert additives (e.g., metal oxides) can successfully prevent sticking in both shaft furnaces and fluidized bed processes. The types of additives and coating methods, the stage of reduction where the coating is applied, and reduction temperature will dramatically affect the coating performance. The outlook is discussed as well given the need for further work to improve the performance of coating (methods, timing, and cheaper alternatives), to further de-risk DRI technologies.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Behavior of Slag Rim and Shell Initial Solidification at Meniscus in Continuous Casting Slab Mold 连铸板模中渣边和壳体在半月板处的初始凝固行为研究

Metallurgical and Materials Transactions B Pub Date : 2024-07-25 DOI: 10.1007/s11663-024-03195-y

Zijian Wei, Zhihao Wang, Di Zhang, Yu Liu, Xudong Wang, Man Yao

{"title":"Study on Behavior of Slag Rim and Shell Initial Solidification at Meniscus in Continuous Casting Slab Mold","authors":"Zijian Wei, Zhihao Wang, Di Zhang, Yu Liu, Xudong Wang, Man Yao","doi":"10.1007/s11663-024-03195-y","DOIUrl":"https://doi.org/10.1007/s11663-024-03195-y","url":null,"abstract":"Understanding the formation of a slag rim on the mold meniscus is crucial for controlling surface defects in the initial shell. However, there is a scarcity of quantitative studies on this matter. This study has developed a comprehensive three-dimensional (3D) numerical model for analyzing the meniscus multi-phase flow, heat transfer, and solidification, considering mold oscillation. The 3D morphology of the solidifying shell and the slag rim in the meniscus region were accurately reproduced. The solidification depth (DIS), solidification length (LIS) and oscillation mark depth (DOM) of the initial shell were used to quantify the morphological characteristics of the initial shell. The results confirmed that the formation position difference of the slag rim along the circumferential direction of the mold significantly affects the initial solidification and uniform growth of the shell. In the corner of the mold, the deeper overflow makes the oscillation mark extend 2.8 to 3.2 mm in the direction of casting. In addition, in order to quantitatively investigate the influence of the slag rim, a two-dimensional (2D) model is established with phenomena and parameters considered the same as those of the 3D model. According to the slag rim morphology obtained by the 3D model, in the 2D model, it is proposed to construct three slag rims with the same maximum thickness of 6 mm at 10, 20 and 35 mm above the meniscus (HRim). The simulation of initial shell morphology revealed that a lower formation position of the slag rim led to more severe overflow of molten steel from the meniscus, resulting in non-uniform continuous growth of the initial shell. This increases the likelihood of potential blockage in the liquid slag flow towards the slag channel between solidified shell and mold.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and Comparison Study of Industrial AC-Arcs 工业交流电弧的建模和比较研究

Metallurgical and Materials Transactions B Pub Date : 2024-07-24 DOI: 10.1007/s11663-024-03214-y

Hákon Valur Haraldsson, Halldór Traustason, Yonatan A. Tesfahunegn, Merete Tangstad, Gudrun Saevarsdottir

{"title":"Modeling and Comparison Study of Industrial AC-Arcs","authors":"Hákon Valur Haraldsson, Halldór Traustason, Yonatan A. Tesfahunegn, Merete Tangstad, Gudrun Saevarsdottir","doi":"10.1007/s11663-024-03214-y","DOIUrl":"https://doi.org/10.1007/s11663-024-03214-y","url":null,"abstract":"Electric arcs are a necessary heat source in many industrial processes that take place in Submerged Arc Furnaces (SAFs). Arcs exhibit non-linear electrical characteristics and behave in a complex manner. Therefore, an improved understanding of their behavior enables better control of furnace operation. Modeling of industrial arcs is a multiphysics process that involves simultaneously solving several coupled physical phenomena, such as electromagnetics, fluid dynamics, and heat transfer, including a radiative heat transfer from the plasma arc. Coupling fluid dynamics and electromagnetics is known as Magnetohydrodynamics (MHD). For practical applications, however, there are also simpler approaches to arc modeling, either based on simplified physical principles or empirical behavior. In this paper, a combined Cassie–Mayr model (CMM) and a channel arc model (CAM) are implemented and coupled with a submerged arc furnace electrical circuit model. The complete circuit model parameters such as resistances and inductances are estimated using modeling of a full size furnace, and then, actual measurements from a SAF are used to validate the models by comparing current and voltage waveform. Both models are then used to estimate harmonic distortion in a SAF for different arc current ratios, which should help operators to estimate the arc current in real time thus be able to lower and raise the electrode to keep operating conditions constant.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0