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8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8

作者： Chen, Yong Zhang, Dade Wu, Guorong Pan, Hong PanGang Group Research Institute Co. Ltd. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua 617000 Sichuan China Pangang Group Steel Vanadium and Titanium Co. Ltd. Panzhihua 617067 Sichuan China

ISBN: (纸本)9781632660008

According to the problems of bad castability of molten steel, surface longitudinal cracks and the difficulty of elimination for internal defects of billet in rolling process, the technologies of continuous casting process and quality control for square/round billet have been studied systematically. On this basis, integrated techniques of continuous casting process and quality control for billets are proposed, containing castability optimization, surface and internal quality improvement of billets. Large scale production application shows that the number of heats per sequence in a single tundish is increased from 4-5 heats to 7-8 heats. The non-defect rates of surface quality reach 98.91% and 97.81% for square billet and round billet, respectively. The comprehensive rates below level 1.0 of internal defects of center porosity, center segregation and center cracks are above 98.9%% and 98.5% for square billet and round billet, respectively. Furthermore, carbon segregation index is in the range of 0.93-1.09.

关键词： Process control

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A review: Research into organic surface treatment of titanium dioxide material 9th

A review: Research into organic surface treatment of titaniu...

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9th China Functional Materials Technology and Industry Forum, 9th CEMTIF 2017

作者： Wu, Xiao-Ping Liu, Chan Liu, Yong Hou, Teng-Fei Wu, Z. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization PanzhihuaSichuan617000 China Aston Institute of Materials Research School of Engineering and Applied Science Aston University United Kingdom

ISBN: (纸本)9783035712469

titanium dioxide is currently the most important white pigment material used in the world and its surface properties are very important for consumer industries such as paints, papermaking and plastics. If agglomerates are present, the down-stream product properties such as gloss, opacity, and storage stability will be greatly affected. The addition of organic surface treatment agents onto the surface of titanium dioxide particles can change its surface: reduce the inter-particle forces to reduce particle agglomerates;change the hydrophobic or hydrophilic properties of particle surface to enhance the compatibility with the solvent, water, or organic resin;can also improve the particle mobility and industrial processing. Therefore, it is very important to fully understand the interaction mechanism between pigment particles and functional organic surface treatment agents. This paper summarizes the related research results and progress. © 2018 Trans Tech Publications, Switzerland.

关键词： Surface properties

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High cycle fatigue behavior of titanium microalloyed high-strength beam steels

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Journal of Iron and Steel Research International 2023年第11期30卷 2267-2279页

作者： Zhi-jun Gao Guang-fei Pan Yu Song Shui-ze Wang Xiao-yu Ye Xin-ping Mao Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China Pangang Group Research Institute Co. Ltd.State Key Laboratory of Vanadium and Titanium Resources Comprehensive UtilizationPanzhihua617000SichuanChina Guangdong Laboratory for Materials Science and Technology Yangjiang Branch(Yangjiang Advanced Alloys Laboratory)Yangjiang529500GuangdongChina

The realization of an ideal combination of mechanical and fatigue properties is prerequisites for practical application of titanium(Ti)microalloyed steel in automotive *** fatigue behavior of four Ti microalloyed high-strength beam steels with different Ti contents was systematically *** results show that the content of microalloying element Ti has a significant effect on the fatigue properties,especially in the steel with a high Ti *** the experimental Ti microalloyed steel,inclusion-induced crack initiation is the main fatigue failure *** from general fatigue fracture mechanism in Ti-contained steel,no TiN,which is the most detrimental to fatigue behavior,was found in fatigue crack initiation ***,the large-sized TiN and oxide complex inclusion with a core-shell structure is the dominant cause of fatigue *** of the intense-localized deformation at the interface between complex inclusion and matrix,the angular TiN in the outer shell has a serious deteriorating effect on the fatigue properties,which is consistent with the result of the Kernel average misorientation ***,the modification effect of a small amount of MnS on large-sized inclusion is not obvious and has little effect on the fatigue *** more practical guidance,the critical inclusion sizes of the experimental steels were also investigated by experimental extrapolation *** the increasing tensile strength,the inclusion sensitivity of the experimental steels increases,leading to the small critical inclusion size.

关键词： titanium microalloyed steel High cycle fatigue Fatigue fracture Critical inclusion size

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Study on the process of TC4 powders prepared by electrode induction melting gas atomization for laser 3D printing 1

Study on the process of TC4 powders prepared by electrode in...

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1st International Conference on Metals and Alloys, CMA 2019

作者： Xie, B. Fan, Y.Z. Miao, Q.D. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua Sichuan617000 China Pangang Group Research Institute Co. Ltd. Panzhihua Sichuan617000 China

This study employed TC4 rod as raw material to fabricate TC4 powders for laser 3D printing via electrode induction melting gas atomization (EIGA). The morphologies, phase compositions, particle size distributions, apparent densities and flowabilities of the powders were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), laser particle size analyzer (LPS) and Hall flowmeter, respectively. Moreover, the effects of gas atomization pressure and melting temperature on the yield of TC4 powders for laser 3D printing were studied. The results showed that TC4 powders morphology was nearly regular spherical. The particle size of TC4 powders showed a single peak normal distribution, mainly distributed in the range of 15-180 μm. The powder was α'-Ti of a single phase solid solution. The optimum parameters were gas atomization pressure of 5MPa, melting temperature of 1750°. Under the optimized condition, the average particle size D50 was 60.2 μm, the yield of printable TC4 powders was 35.6%, the flowability was 41.2 s/50g, the apparent density was 2.76 g/cm3 and oxygen content was 800 ppm, which was in line with the ASTM test standard and was conformed to the requirement for laser 3D printing. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Particle size analysis

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Properties of mno on high al2 o3 slag and its mechanism used for flushing blast furnace (bf)

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Metalurgija 2021年第1-2期60卷 7-10页

作者： Dai, B. Ma, Y. Long, H. Ji, Y. Rao, J. Key Laboratory of Multidisciplinary Management and Control of Complex Systems of Anhui Higher Education Institutes Anhui University of Technology MaanshanAnhui China Key Laboratory of Metallurgical Emission Reduction & Resources Recycling Anhui University of Technology Ministry of Education MaanshanAnhui China State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization PanzhihuaSichuan China

Flushing blast furnace by manganese ore was one of the important methods to recover the hearth inactivity caused by hearth accumulation. In this work, the properties and mechanism of the slag with different MnO content were researched, including the viscosity and critical temperature measured by rotating cylinder method, the mineral phase and microstructure confirmed by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and fourier transform infrared spectrometer (FTIR). The experiment results showed that during the process of flushing blast furnace, the appropriate and optimal MnO in the slag was 1,5 to 2,0 mas .%, the mechanism of flushing by MnO was that the tephroite whose melting point is low forms, the depolymerization of [SiO4 ]-tetrahedral structure caused by MnO addition also plays an important role in reducing the viscosity of the slag. © 2021, Faculty of Metallurgy. All rights reserved.

关键词： Slags

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Metallothermic reduction at low temperature synthesis of ti4o7 powder with lithium ion insertion/extraction property 2nd

Metallothermic reduction at low temperature synthesis of ti4...

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2nd Academic Conference on Frontiers in Advanced Materials, ACFAM 2018

作者： Beilei, Yan Weiwei, Meng Sanchao, Zhao Pangang Group Research Institute Company Limited PanzhihuaSichuan Province617000 China State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization PanzhihuaSichuan Province617000 China

ISBN: (纸本)9783035714753

In this work, a thermal reduction process via ultrafine titanium powder as the reducing agent under argon atmosphere is firstly used to prepare Ti4O7. Compared with the conventional method, this experiment process reduces the sintering temperature to 850°C. The phase transformation and the morphology of the as-prepared powders are examined by X-Ray diffraction (XRD) and scanning electron microscopy (SEM). Besides, it is found that the Ti4O7 powders obtained by titanium thermal reduction method exhibited the crystal structure, distinctly possessing an average particle size around 750 nm. The as-prepared Ti4O7 nanoparticles are used as anode active material in lithium battery. The results demonstrate that the anode with Ti4O7 calcined at 850°C by titanium thermal reduction method exhibited insertion/extraction lithium ion property. © 2019 Trans Tech Publications Ltd, Switzerland.

关键词： Anodes

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Microscale spherical TiO_(2)powder prepared by hydrolysis of TiCl_(4)solution:Synthesis and kinetics

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Particuology 2024年第1期84卷 60-71页

作者： Peiyi Yan Ying Zhang Shili Zheng School of Rare Earths University of Science and Technology of ChinaHefei230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou341119China Key Laboratory of Green Process and Engineering National Engineering Research Center of Green Recycling for Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua617000China

Hydrolysis of TiCl_(4)solution is capable of preparing microscale TiO_(2)*** research studied the synthesis of microscale spherical TiO_(2)powders and the hydrolysis *** effects of the flow field generated by different agitators and baffles in the crystallizer,the initial free acid concentration,the initial equivalent TiO_(2)concentration,and the temperature on the hydrolysis progress and powder morphology were systematically *** results show that the flow field in a crystallizer can significantly affect the morphology and particle size of the powders,and the axial flow can improve the sphericity of the *** increased free HCl and equivalent TiO_(2)concentrations in the pregnant solution inhibit the forward hydrolysis reaction,prolong the time to reach equilibrium,and reduce the *** appropriate temperature matching the compositions of the pregnant solution is crucial for the powder morphology and *** with sizes ranging from around 5 um-40μm can be tuned under controlled flow field,solution compositions,and temperature *** addition,the Cheng and Wunderlich modified Avrami equation was used for the crystallization kinetic *** effects of the free HCl concentration,equivalent TiO_(2)concentration,and hydrolysis temperature are reflected in the reaction rate constant and active nuclei reduction *** the free HCl and equivalent TiO_(2)concentrations will reduce the reaction rate constant and accelerate the deactivation of the active nuclei,thus increasing the final powder size,while increasing the temperature will lead to the opposite results.

关键词： TiCl_(4) Hydrolysis Microscale TiO_(2) Spherical Kinetics

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Self-Adjusting Coordination of Carboxylate for Constructing Stable 4-Connected Tetrazolate Porous Frameworks with Luminescence

SSRN

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SSRN 2023年

作者： Chen, Xingliang Jiang, Zhiqiang Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province College of Vanadium and Titanium Panzhihua University Panzhihua617000 China

Herein, a series of zinc tetrahedral tetrazolate frameworks (Zn-TTFs) are presented. The reactions of Zn(NO3)2·6H2O with 5-amino-1H-tetrazole and pyromellitic acid assemble four different Zn-tetrazolate porous networks, namely [Zn2(atz)3(PMA)](1), [Zn2(atz)3.5(PMA)0.25](2), [Zn (atz)1.5(PMA)0.25](3), [Zn3(atz)3(PMA)(Thiourea)(CH3OH)](4), (atz = 5-amino-1H-tetrazole, PMA = pyromellitic acid), whose results demonstrate that rotation of carboxyl group can generate the structural diversity. Interestingly, compound 3 shows a zeolite frl net, while compound 4 exhibits simultaneously super acid and alkali resistance. The luminescent properties based on compound 3 have been studied in the solid state at room temperature, and all of them display lanthanide-based luminescence. © 2023, The Authors. All rights reserved.

关键词： Zeolites

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Research on recycling technology of vanadium extracting waste

Research on recycling technology of vanadium extracting wast...

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2012 Asian Pacific Conference on Energy, Environment and Sustainable Development, APEESD 2012

作者： Jiang, Longkui Zou, Xiangfei PanGang Group Research Institute Co. Ltd State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua 617000 Sichuan China PanGang Group Panzhihua Steel and Vanadium Co. Ltd Panzhihua 617067 Sichuan China

ISBN: (纸本)9783037855683

Based on the features of vanadium extracting waste in PanGang, technology ideas are proposed as following: vanadium extracting waste ash is used as coolant in converter, vanadium extracting and vanadium extracting residue is used as slagging material in steelmaking. Influence of slagging material on oxidability of molten steel in converter is analyzed, such as iron and steel consumption, effect of dephosphorization, influence of coolant on semisteel quality after extracting vanadium, and quality of vanadium slag. New way to utilize the waste is developed. Recycling the vanadium extracting waste in PanGang, mitigate the environmental pressure. © (2013) Trans Tech Publications, Switzerland.

关键词： vanadium

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Effective extraction of vanadium and chromium from high chromium content vanadium slag by sodium roasting and water leaching

Effective extraction of vanadium and chromium from high chro...

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International Conference on Materials Science and Nanotechnology, ICMSNT 2016

作者： Li, Ming Xiao, Liang Liu, Jing Jing Shi, Zhi Xin Fu, Zi Bi Peng, Yi Long, Pan Zhong Yang, Yang Jun Pangang Group Research Institute Co. Ltd. State Key Laboratory for Comprehensive Utilization of Vanadium and Titanium Resources PanzhihuaSichuan617000 China Panzhihua College PanzhihuaSichuan617000 China

ISBN: (纸本)9783038357100

The extraction of vanadium and chromium from high chromium content vanadium slag by salt roasting and water leaching process has been investigated, which uses mixed sodium salts (Na2CO3 and NaOH) as additive agent in roasting process. The mineralogical morphology was prospected by TG-DSC, XRD, SEM and EDS. The oxidation of slag and transversion of V/Cr-containing phase and sodium salts have been discussed. It has been demonstrated that the presence of NaOH contributes to decompose spinel and olivine phases, which is beneficial to reduce the roasting temperature and elevate V, Cr leaching ratio. The roasting parameters have been studied as a function of roasting temperature, roasting time and ratio of alkali, in which the roasting temperature is the most effective factor on the leaching rate of vanadium and chromium. Under the optimum condition, the leaching rates of V and Cr reached 95.8% and 97.6%, respectively. © 2016 Trans Tech Publications, Switzerland.

关键词： vanadium

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