Journal of Iron and Steel Research International最新文献_第8页

Numerical simulation and experimental investigation of manufacturing route of directional casting super slab 定向铸造超级板坯制造路线的数值模拟和实验研究

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-21 DOI: 10.1007/s42243-024-01235-0

Ming Li, Jun Fu, Neng Ren, Biao Tao, Alan Scholes, Jun Li, Jian-guo Li, Hong-biao Dong

{"title":"Numerical simulation and experimental investigation of manufacturing route of directional casting super slab","authors":"Ming Li, Jun Fu, Neng Ren, Biao Tao, Alan Scholes, Jun Li, Jian-guo Li, Hong-biao Dong","doi":"10.1007/s42243-024-01235-0","DOIUrl":"https://doi.org/10.1007/s42243-024-01235-0","url":null,"abstract":"We proposed a new technique route of directional solidification for the manufacture of super slab. A 7-t laboratory-scale thick slab was casted and characterised for trial. To further understand the process, the evolution of the multiple physical fields during the directional solidification was simulated and verified. Similar to the convectional ingot casting, a negative segregated cone of equiaxed grains was formed at the bottom, and a seriously positive segregated region was formed beneath the top surface of the slab. Specific measures on the lateral walls, base plate, and free surface were strongly recommended to ensure that the slab is relatively directionally casted. A water-cooling copper base plate accelerates the solidification rate and the columnar growth along the vertical direction. It inhibits the sedimentation of equiaxed grains and enlarges the columnar zone. Based on the simulation analysis, it can be concluded that the directional solidification technique route is promising to manufacture super slab with lower segregation level, and less porosities and inclusions.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"20 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","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 phase content on deformation compatibility in ferrite and bainite dual-phase steel: experimental and crystal plasticity finite element analysis 相含量对铁素体和贝氏体双相钢变形兼容性的影响：实验和晶体塑性有限元分析

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-21 DOI: 10.1007/s42243-024-01232-3

Xian-bo Shi, Xing-yang Tu, Bing-chuan Yan, Yi Ren, Wei Yan, Yi-yin Shan

{"title":"Effect of phase content on deformation compatibility in ferrite and bainite dual-phase steel: experimental and crystal plasticity finite element analysis","authors":"Xian-bo Shi, Xing-yang Tu, Bing-chuan Yan, Yi Ren, Wei Yan, Yi-yin Shan","doi":"10.1007/s42243-024-01232-3","DOIUrl":"https://doi.org/10.1007/s42243-024-01232-3","url":null,"abstract":"The phase volume fraction has an important role in the match of the strength and plasticity of dual phase steel. The different bainite contents (18–53 vol.%) in polygonal ferrite and bainite (PF + B) dual phase steel were obtained by controlling the relaxation finish temperature during the rolling process. The effect of bainite volume fraction on the tensile deformability was systematically investigated via experiments and crystal plasticity finite element model (CPFEM) simulation. The experimental results showed that the steel showed optimal strain hardenability and strength–plasticity matching when the bainite reached 35%. The 3D-CPFEM models with the same grain size and texture characters were established to clarify the influence of stress/strain distribution on PF + B dual phase steel with different bainite contents. The simulation results indicated that an appropriate increase in the bainite content (18%–35%) did not affect the interphase strain difference, but increased the stress distribution in both phases, as a result of enhancing the coordinated deformability of two phases and improving the strength–plasticity matching. When the bainite content increased to 53%, the stress/strain difference between the two phases was greatly increased, and plastic damage between the two phases was caused by the reduction of the coordinated deformability.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"61 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phase equilibria of Fe3O4–Cr2O3–CaO system: experimental measurements and thermodynamic calculations Fe3O4-Cr2O3-CaO体系的相平衡：实验测量和热力学计算

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-18 DOI: 10.1007/s42243-024-01225-2

Ao Zhu, Chen-ying Shi, Pei-yuan Ni, Teng-fei Deng

{"title":"Phase equilibria of Fe3O4–Cr2O3–CaO system: experimental measurements and thermodynamic calculations","authors":"Ao Zhu, Chen-ying Shi, Pei-yuan Ni, Teng-fei Deng","doi":"10.1007/s42243-024-01225-2","DOIUrl":"https://doi.org/10.1007/s42243-024-01225-2","url":null,"abstract":"Understanding the phase equilibria of the Fe3O4–Cr2O3–CaO system is essential for the efficient recycling of stainless steel pickling sludge. The isothermal section of this system at 1473 K under oxygen partial pressure of 0.15 Pa was investigated. Key experiments on the relevant binary systems were conducted using a combination of equilibrium-quenching techniques, X-ray diffraction, high-resolution transmission electron microscope, and electron probe microanalysis. These systems were rigorously assessed using the CALPHAD (CALculation of Phase Diagram) method, incorporating the present experimental data. The liquid phase was modeled using the ionic two-sublattice model, represented as (Ca2+, Cr3+, Fe2+)P(O2−, Va, FeO1.5)Q, where Va represents vacancy, and P and Q denote the number of sites on the cation and anion sublattices, respectively. To ensure electroneutrality, the values of P and Q adjust according to the composition of the mixture. From this, the isothermal section of the Fe3O4–Cr2O3–CaO system at 1473 K under the specified oxygen partial pressure was obtained based on the thermodynamic parameters of the binary systems. The present experimental data and calculation results hold significant implications for the comprehensive recycling of stainless steel pickling sludge.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"1 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New electromagnetic variable flow device for slab continuous casting mold: mechanical design and magnetic field analysis 用于板坯连铸模的新型电磁变流装置：机械设计和磁场分析

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-18 DOI: 10.1007/s42243-024-01255-w

Xi-qing Chen, Pu Wang, Shun Liu, Hong Xiao, Lin-lin Lei, Jia-quan Zhang

{"title":"New electromagnetic variable flow device for slab continuous casting mold: mechanical design and magnetic field analysis","authors":"Xi-qing Chen, Pu Wang, Shun Liu, Hong Xiao, Lin-lin Lei, Jia-quan Zhang","doi":"10.1007/s42243-024-01255-w","DOIUrl":"https://doi.org/10.1007/s42243-024-01255-w","url":null,"abstract":"Obtaining a reasonable mold flow field for casting slabs with different sections is challenging by solely modifying the nozzle structure and continuous casting process. Research was conducted on small-sectioned (1000 mm × 220 mm) and large-sectioned (3250 mm × 220 mm) slab continuous casting molds with a fixed nozzle form (concave bottom nozzle, side port inclination angle of 0°). A three-dimensional electromagnetic model is established to analyze the current frequency, installation position, and rotation angle under the active deceleration mode and acceleration mode. The results indicate that, regardless of the deceleration mode for small-sectioned slabs or the acceleration mode for large-sectioned slabs, the magnetic flux density in the mold decreases with increasing current frequency. However, the maximum electromagnetic force initially increases and then decreases, suggesting that both electromagnetic modes have the same optimal current frequency (3 Hz). The optimal mechanical design parameters for the deceleration mode of electromagnetic variable flow device (EM-VFD) with the small-sectioned slab are as follows: installation position Z = 115 mm and rotation angle of 15°, ensuring that the maximum electromagnetic force is applied to the nozzle jet area. For the acceleration mode of the large-sectioned slab EM-VFD, the optimal mechanical design parameters are as follows: Z = 115 mm and rotation angle of 10°, ensuring that the maximum electromagnetic force is applied to 1/4 and 3/4 areas of the wide face. These findings indicate that the new electromagnetic variable flow device, which can actively adjust the flow rate and angle of the steel even under given working conditions, provides the possibility for reasonable control of the mold’s flow field.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"60 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revealing dislocation activity modes during yielding and uniform deformation of low-temperature tempered steel by acoustic emission 利用声发射揭示低温回火钢屈服和均匀变形过程中的位错活动模式

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-17 DOI: 10.1007/s42243-024-01253-y

Jie Li, Jia-zhi Zhang, Li-yang Zeng, Shuai Wang, Xiang-yu Song, Nai-lu Chen, Xun-wei Zuo, Yong-hua Rong

{"title":"Revealing dislocation activity modes during yielding and uniform deformation of low-temperature tempered steel by acoustic emission","authors":"Jie Li, Jia-zhi Zhang, Li-yang Zeng, Shuai Wang, Xiang-yu Song, Nai-lu Chen, Xun-wei Zuo, Yong-hua Rong","doi":"10.1007/s42243-024-01253-y","DOIUrl":"https://doi.org/10.1007/s42243-024-01253-y","url":null,"abstract":"The distinctive distribution of acoustic emission (AE) characteristic parameters generated during tensile testing of low-temperature tempered AISI 4140 steel was investigated. Two clusters of acoustic emission signals were distinguished using power-law distribution fitting and k-means clustering methods. These clusters were identified as resulting from dislocation motion during yielding and dislocation entanglement during uniform plastic deformation. The conclusion is further confirmed by transmission electron microscopy images at different strains. In particular, the unique \"arch-shaped\" distribution of the acoustic emission energy during yielding implies a change in unusual dislocation motion modes. The effect of carbide precipitation was qualitatively discussed as not considering the primary cause of the formation of this arch-shaped distribution. The evolution of dislocation motion modes during yielding of low-temperature tempered martensite was elucidated by comparing the significant difference in cumulative energy values during yielding of annealed and low-temperature tempered specimens. Dislocations emit from Frank–Read or grain boundary sources and slip along short free paths, contributing to the initial increase in AE signals energy. Subsequently, the primary source of acoustic emission energy “arch-shaped” peak during yielding was generated by the avalanche behavior of accumulated dislocations, leading to the accelerated dislocation motion.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"12 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial behaviors between ZG13Cr9Mo1VNbN stainless steel and chromite sand ZG13Cr9Mo1VNbN 不锈钢与铬铁矿砂之间的界面行为

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-05 DOI: 10.1007/s42243-024-01218-1

Shi-sen Li, Xi-min Zang, Ji-lin Chen, Jie Yang, Yu-an Jing, Zhi-ying Wang, Ling-zhong Kong

{"title":"Interfacial behaviors between ZG13Cr9Mo1VNbN stainless steel and chromite sand","authors":"Shi-sen Li, Xi-min Zang, Ji-lin Chen, Jie Yang, Yu-an Jing, Zhi-ying Wang, Ling-zhong Kong","doi":"10.1007/s42243-024-01218-1","DOIUrl":"https://doi.org/10.1007/s42243-024-01218-1","url":null,"abstract":"To elucidate the formation mechanisms of burn-on sand and metal penetration during sand casting, some laboratory experiments were carried out at different temperatures (1813, 1833, 1853, and 1873 K) and holding time (20, 40, 60, and 90 min) to simulate the interaction between ZG13Cr9Mo1VNbN stainless steel and chromite sand. The results demonstrate that the defects primarily consist of a mixture of the liquid phase, chromite, and metal. The main components of the liquid phase are SiO2, MnO, MgO, Cr2O3, FeO, and Al2O3, and the formation of Cr2O3 through interfacial redox reactions has been discovered. The presence of a liquid phase plays a pivotal role in influencing burn-on sand and metal penetration. Interface reactions are prioritized, with burn-on sand maintaining a predominant influence. As the liquid phase quantity within the sand escalates, there is a corresponding incremental rise in the incidence of metal penetration. Even a minimal presence of the silicon element in steel can impact the liquid phase’s formation. Moreover, the decomposition or dissolution of chromite sand is a significant factor in the development of burn-on sand and metal penetration. Thus, a thorough investigation into the conditions and contributing factors of this phenomenon is essential for its effective management and mitigation.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"52 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of working conditions and prediction of FeO content in sintering process of iron ore fines 铁矿粉烧结过程中工作条件的确定和氧化铁含量的预测

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-04 DOI: 10.1007/s42243-024-01220-7

Xiao-ming Li, Bao-rong Wang, Zhi-heng Yu, Xiang-dong Xing

{"title":"Identification of working conditions and prediction of FeO content in sintering process of iron ore fines","authors":"Xiao-ming Li, Bao-rong Wang, Zhi-heng Yu, Xiang-dong Xing","doi":"10.1007/s42243-024-01220-7","DOIUrl":"https://doi.org/10.1007/s42243-024-01220-7","url":null,"abstract":"The iron oxide (FeO) content had a significant impact on both the metallurgical properties of sintered ores and the economic indicators of the sintering process. Precisely predicting FeO content possessed substantial potential for enhancing the quality of sintered ore and optimizing the sintering process. A multi-model integrated prediction framework for FeO content during the iron ore sintering process was presented. By applying the affinity propagation clustering algorithm, different working conditions were efficiently classified and the support vector machine algorithm was utilized to identify these conditions. Comparison of several models under different working conditions was carried out. The regression prediction model characterized by high precision and robust stability was selected. The model was integrated into the comprehensive multi-model framework. The precision, reliability and credibility of the model were validated through actual production data, yielding an impressive accuracy of 94.57% and a minimal absolute error of 0.13 in FeO content prediction. The real-time prediction of FeO content provided excellent guidance for on-site sinter production.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"48 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","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 TiO2 addition on microstructures and properties of MgO–CaO refractory aggregates 添加 TiO2 对氧化镁-氧化钙耐火聚集体微观结构和性能的影响

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-04 DOI: 10.1007/s42243-024-01247-w

Shuai Zhang, Jing-ran Wang, Yuan-gao Li, Feng-you Li, Wen Yan, Hui-ying Shi

{"title":"Effect of TiO2 addition on microstructures and properties of MgO–CaO refractory aggregates","authors":"Shuai Zhang, Jing-ran Wang, Yuan-gao Li, Feng-you Li, Wen Yan, Hui-ying Shi","doi":"10.1007/s42243-024-01247-w","DOIUrl":"https://doi.org/10.1007/s42243-024-01247-w","url":null,"abstract":"MgO–CaO (40 wt.% CaO) refractory aggregates were prepared using the calcined dolomite and light-burned magnesia fine powder as raw materials and TiO2 as additive. The effect of TiO2 on their phase composition, microstructures and properties was investigated by X-ray diffraction and scanning electron microscopy. The properties such as bulk density, apparent porosity, relative aggregate tube strength and hydration resistance were also investigated. The results showed that the CaTiO3 generated by the reaction between CaO and TiO2 was distributed around the CaO grain boundaries and intermittently distributed with MgO, which formed an isolation layer around CaO and greatly improved the hydration resistance. Meanwhile, the introduction of TiO2 promoted sintering and increased the grain size, further improving the strengths and hydration resistance of the materials. In addition, the most significant enhancement in the hydration resistance and strengths of the samples was achieved when 1.0–2.0 wt.% TiO2 was added. In this case, the relative strength of aggregate increased from 33.3% to 37.3%–43.1%, and the mass gain after the hydration test decreased from 3.13% to 1.26%–1.45%.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"67 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative characterization of reaction behavior between La-bearing FeCrAl melt and CaO–Al2O3–La2O3-based slags and its guidance for design of mold flux 含 La 的铁铬铝熔体与 CaO-Al2O3-La2O3 基熔渣之间反应行为的定量表征及其对模具助熔剂设计的指导作用

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-04 DOI: 10.1007/s42243-024-01233-2

Lei Fan, Tian-peng Qu, De-yong Wang, Cheng-jun Liu

{"title":"Quantitative characterization of reaction behavior between La-bearing FeCrAl melt and CaO–Al2O3–La2O3-based slags and its guidance for design of mold flux","authors":"Lei Fan, Tian-peng Qu, De-yong Wang, Cheng-jun Liu","doi":"10.1007/s42243-024-01233-2","DOIUrl":"https://doi.org/10.1007/s42243-024-01233-2","url":null,"abstract":"The reaction behavior between CaO–Al2O3–La2O3-based slags and La-bearing FeCrAl melt was quantitatively characterized, which was further compared with the reaction behavior of CaO–SiO2-based slags. Based on this, the new type of mold flux for La-bearing FeCrAl alloy continuous casting was designed and its basic properties were evaluated. The results showed that the order of reaction degree of fluxing agents in CaO–Al2O3–La2O3-based slags is (Na2O) > (B2O3) > (Li2O), and the percentages of mass change of fluxing agents were 85.8, 54.29 and 42.35 wt.%, respectively. Moreover, the addition of (Li2O) and (Na2O) promoted the reaction between (CaO) and [Al], and the reaction degree of the former was weaker than that of the latter, which was due to the greater effect of (Na2O) on the activity of (CaO) and (Al2O3) than (Li2O). Compared with the reactivity of CaO–SiO2-based slags, the percentages of mass change of Al and La caused by slag–steel reaction decreased by 10.63–14.36 and 39.78–50.49 wt.%, respectively. The percentages of mass change of (Al2O3), (La2O3) and (CaO) in slags highest increased by 17.71, 17.98, and 7.81 wt.%, respectively. The reactivity of CaO–Al2O3–La2O3-based slags was significantly weakened. Ultimately, the new type of mold flux was designed and the composition range was determined. The fundamental properties of new mold flux basically meet the theoretical requirements for La-bearing FeCrAl alloy continuous casting.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"58 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","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 TiO2 and BaO on viscosity and potassium removal capacity of blast furnace slag TiO2 和 BaO 对高炉渣粘度和脱钾能力的影响

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-06-04 DOI: 10.1007/s42243-024-01222-5

Jian-tao Ju, Xin-yi Li, Liu-le Wei, Xiang-dong Xing

{"title":"Effect of TiO2 and BaO on viscosity and potassium removal capacity of blast furnace slag","authors":"Jian-tao Ju, Xin-yi Li, Liu-le Wei, Xiang-dong Xing","doi":"10.1007/s42243-024-01222-5","DOIUrl":"https://doi.org/10.1007/s42243-024-01222-5","url":null,"abstract":"In order to increase the utilization rate of vanadium–titanium magnetite in blast furnace smelting, the viscosity and potassium removal capacity of CaO–SiO2–Al2O3–MgO–BaO–TiO2 slag (CaO/SiO2 = 1.05, 1–5 wt.% BaO, 2–20 wt.% TiO2) were studied for slag optimization using the cylinder method and slag–metal equilibrium technique, respectively. Also, the structural properties of the slag were characterized by Fourier transform infrared spectroscopy. The concept of “a ring structure of Ti–O–Si” was proposed to express the change in the viscosity of the blast furnace slag. The results showed that the viscosity of slag increased with the increase in BaO content while the potassium removal capacity decreased. Furthermore, an increase in TiO2 content from 2 to 20 wt.% resulted in a decrease in viscosity and an increase in potassium removal capacity. The Fourier transform infrared spectroscopy results showed that the charge compensation of Ba2+ can form complex aluminosilicate structure and increase the viscosity of slag. Meanwhile, with the increase in TiO2 content, Ti4+ ions replace Si4+ in the silicon-oxygen tetrahedral structure, thereby reducing the degree of polymerization of the silicate network and decreasing the viscosity.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"41 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0