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Sulfur distribution in preparation of high titanium ferroalloy by thermite method with different CaO additions

Rare Metals 2019年第8期38卷 793-799页

作者： Chu Cheng Zhi-He Dou Ting-An Zhang Jian-Ming Su Hui-Jie Zhang Yan Liu Li-Ping Niu School of Metallurgy Northeastern University Shenyang 110819 China Key Laboratory of Ecological Utilization of Multi-Metal Intergrown Ores of Ministry of Education Northeastern University Shenyang 110819 China

Ferrotitanium is used as a deoxidizer and alloying agent during steelmaking process,which has a high demand for sulfur *** was introduced from raw materials in the process of producing ferrotitanium by thermite method,where CaO was used as fluxing *** the same time,CaO has a great desulfurization *** of CaO addition on the distribution of sulfur in high titanium ferroalloy prepared by thermite method were studied in this *** equilibrium diagram of Ti-AlFe-S system was calculated by FactSage 6.4 software package with FactPS and FTmisc *** alloy and slag samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),inductively coupled plasma atomic emission spectrometer(ICP-AES),X-ray fluorescence(XRF)and high-frequency infrared ray carbon sulfur *** result indicates that the sulfur in the alloy firstly exists in the form of liquid FeS,thereafter TiS(s)and eventually Ti2 S(s)during *** sulfur is mainly distributed in the alloy,and only a small amount of sulfur remains in the ***,it is noted that the sulfur in the alloy does not distribute homogeneously,and it exists in the form of solid solution phase,(Ti,Al,Fe)S.S content in the slag,the sulfur capacity of the slag and the sulfur distribution ratio(LS)all increase with the increment of CaO addition,while S content in alloys decreases.

关键词： Desulfurization Sulfur partition ratio Optical basicity High titanium ferroalloy Thermite method

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Heavy Metals in Soil and Salad in the Proximity of Historical ferroalloy Emission

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Journal of Environmental Protection 2012年第5期3卷 374-385页

作者： Roberta Ferri Filippo Donna Donald R. Smith Stefano Guazzetti Annalisa Zacco Luigi Rizzo Elza Bontempi Neil J. Zimmerman Roberto G. Lucchini Department of Experimental and Applied Medicine University of Brescia Brescia Italy INSTM and Chemistry for Technologies Laboratory University of Brescia Brescia Italy Microbiology and Environmental Toxicology University of California Santa Cruz USA Public Health Service Reggio Emilia Italy School of Health Sciences Purdue University West Lafayette USA

Emissions of manganese (Mn), lead (Pb), iron (Fe), zinc (Zn), copper (Cu) from ferro-alloy operations has taken place in Valcamonica, a pre-Alp valley in the province of Brescia, Italy, for about a century until 2001. Metal concentrations were measured in the soil of local home gardens and in the cultivated vegetables. Soil analysis was carried out using a portable X-Ray Fluorescence (XRF) spectrometer in both surface soil and at 10 cm depth. A subset of soil samples (n = 23) additionally was analysed using the modified BCR sequential extraction method and ICP-OES for intercalibration with XRF (XRF Mn = 1.33 * total OES Mn – 71.8;R = 0.830, p Lactuca sativa and Chichorium spp.) were analyzed with a Total Reflection X-Ray Fluorescence (TXRF) technique. Vegetable and soil metal measurements were performed in 59 home gardens of Valcamonica, and compared with 23 gardens from the Garda Lake reference area. Results indicate significantly higher levels of soil Mn (median 986 ppm vs 416 ppm), Pb (median 46.1 ppm vs 30.2 ppm), Fe (median 19,800 ppm vs 13,100 ppm) in the Valcamonica compared to the reference area. Surface soil levels of all metals were significantly higher in surface soil compared to deeper soil, consistent with atmospheric deposition. Significantly higher levels of metals were shown also in lettuce from Valcamonica for Mn (median 53.6 ppm vs 30.2) and Fe (median 153 vs 118). Metals in Chichorium spp. did not differ between the two areas. Surface soil metal levels declined with increasing distance from the closest ferroalloy plant, consistent with plant emissions as the source of elevated soil metal levels. A correlation between Mn concentrations in soil and lettuce was also observed. These data show that historic ferroalloy plant activity, which ended nearly a decade before this study, has contributed to the persistence of increased Mn levels in locally grown vegetables. Further research is needed to assess whether this increase can lead to adverse effects i

关键词： Heavy Metals ferroalloy Plant Soil Vegetables XRF ICP-OES

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The Endpoint Forecast of AOD Stove ferroalloy Steel-Making Based on Wavelet Neural Network

The Endpoint Forecast of AOD Stove Ferroalloy Steel-Making B...

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2010 Chinese Control and Decision Conference

作者： Yangxiao Hong~1,Xu Jing~2,Yanghong Tao~3 1.Department of Aviation Control Engineering,Aviation University of Air Force,Changchun,130021 2.Department of Neurology Internal Medicine,First Hospital of Jilin University,Changchun,130012 3.Department of Electric Engineering and Electronic Science,Chang Chun University of Technology 130012,China

＜正＞The AOD stove ferroalloy steel-making endpoint temperature and the ingredient are the control objectives of AOD stove ferroalloy steel-making,which has serious nonlinear relations with variables such as oxygen blown quantity and the quantity of molten steel and is unable to measure continuously *** article develops a set of AOD stove smelt ferroalloy end-point control model based on the wavelet neural network and some actual data of a 180t AOD ferroalloy stove in Jilin ferroalloy Factory to conduct the model verification *** forecasting the end-point temperature and the carbon content and gathering the spot operating data and the practical application,we can see that the double hit probability of carbon and temperature reaches above 80%.

关键词： AOD Stove ferroalloy Forecast Wavelet Neural Network

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Preparation of Fe_(3)Si and FeSi intermetallic compounds from copper slag by electrochemical method

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Journal of Iron and Steel Research International 2023年第2期30卷 305-316页

作者： Hui Li Chao-long Xue Yu Yang Jing-long Liang Key Laboratory of Ministry of Education for Modern Metallurgy Technology and College of Metallurgy and Energy North China University of Science and TechnologyTangshan063009HebeiChina Comprehensive Testing and Analyzing Center North China University of Science and TechnologyTangshan063009HebeiChina

Fe_(3)Si and FeSi intermetallic compounds were prepared by CaCl_(2)-NaCl melt electrolysis at 800℃from the non-magnetic copper slag *** phase transition of the cathode particles with different electrolysis voltages and durations was investigated by X-ray fluorescence spectroscopy,inductively coupled plasma spectroscopy,X-ray diffraction,and scanning electron *** results showed that Fe_(3)Si and FeSi intermetallic compounds can be obtained by one-step electrolysis for 10 h at 3.2 V and two-step electrolysis of 2.5 V for 4 h and 3.2 V for 6 ***,the current efficiency increased from 31.70%of one-step electrolysis to 39.87%of two-step *** formation of Fe_(3)Si and FeSi intermetallic compounds is a gradual evolution process with the increase in Si content,following the formation law of Fe→FeSi→Fe_(3)Si+FeSi→*** metallic impurities of the final product were 1.29 wt.%Mg and 3.85 wt.%Al,respectively.

关键词： ferroalloy Intermetallic compound Molten salt electrolysis Copper slag Formation process

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Research on Collision Response of Titanium Alloy Cylindrical Pressure Shell

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World Journal of Engineering and Technology 2020年第4期8卷 658-664页

作者： Lin Wang Xiang Jiang Lei Huang School of Ship and Ocean Engineering Jiangsu University of Science and Technology Zhenjiang China

Titanium alloy materials are widely used in the marine and aviation fields due to their excellent properties. The submersible sailing on the water surface is faster than underwater diving, so once an accident occurs, the consequences are unimaginable. Based on the failure criterion of the J-K model, this paper uses finite element simulation software to study the impact of impact velocity and impact angle on the collision response of a titanium alloy cylindrical pressure shell, providing a reference for the deep sea titanium alloy pressure shell.

关键词： Cylindrical Pressure Shell Collision ferroalloy Response

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Research on Collision Response of Titanium Alloy Cylindrical Pressure Shell

Research on Collision Response of Titanium Alloy Cylindrical...

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作者： Lin Wang Xiang Jiang Lei Huang School of Ship and Ocean Engineering Jiangsu University of Science and Technology

关键词： Cylindrical Pressure Shell Collision ferroalloy Response

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