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Effect of chemical composition on the element distribution,phase composition and calcification roasting process of vanadium slag

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International Journal of Minerals,Metallurgy and Materials 2022年第12期29卷 2144-2151页

作者： Tangxia Yu Tao Jiang Jing Wen Hongyan Sun Ming Li Yi Peng State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua 617000China School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education Northeastern UniversityShenyang 110819China Liaoning Key Laboratory for Metallurgical Sensor and Technology Shenyang 110819China

The chemical composition of vanadium slag significantly affects its element distribution and phase composition,which affect the subsequent calcification roasting process and vanadium *** this work,seven kinds of vanadium slags derived from different regions in China were used as the raw materials to study the effects of different components on the vanadium slag’s elements distribution,phase composition,calcification roasting,and leaching rate of major elements using scanning electron microscope,X-ray diffraction analysis,and inductively coupled plasma-optical emission *** results show that the spinel phase is wrapped with silicate phase in all vanadium slag *** main elements in the spinel phase are Cr,V,and Ti from the interior to the *** size of spinel phase in low chromium vanadium slag is larger than the other vanadium slags with higher chromium *** spinel phase of high-calcium and high-phosphorus vanadium slag is more *** strongest diffraction peak of vanadium spinel phase in the vanadium slag migrates to a higher diffraction angle,and(Fe_(0.6)Cr_(0.4))_(2)O_(3)is formed after calcification roasting as the chromium content increased.A large amount of Ca_(2)SiO_(4)is produced because excess Ca reacts with Si in high-calcium and high-phosphorus vanadium *** vanadium leaching rate reaches 88%in some vanadium *** chromium leaching rate is less than 5%in all vanadium *** silicon leaching rate of high-calcium and high-phosphorus vanadium slag is much higher than that of the other *** leaching rate of manganese is higher than 10%,and the leaching rates of iron and titanium are negligible.

关键词： vanadium slag calcification roasting element distribution phase composition leaching rate

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In-situ Observation of High-temperature Phase Transformation of Ti-6Al-4V titanium Alloy 8

In-situ Observation of High-temperature Phase Transformation...

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2022 8th International Forum on Manufacturing Technology and Engineering Materials, IFEMMT 2022

作者： Zhu, Qiangqiang Yang, Xingdi Lan, Huifang Li, Jianping Zhang, Tianxing State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua617000 China State Key Laboratory of Rolling and Automation Northeastern University Shenyang110819 China

As a typical dual-phase titanium alloy, Ti-6Al-4V has a complex phase transformation process, which is sensitive to temperature parameters and difficult to control its microstructure. To further master the law of phase transformation of Ti-6Al-4V titanium alloy and make a reasonable heat treatment system, different heat treatment systems in ß single-phase region and (a+ß) two-phase region were made for Ti-6Al-4V titanium alloy, and the phase transformation process and microstructure growth rate of different heat treatment processes were studied by high-temperature confocal microscope. At 1050 °C and 1200 °C in the ß single-phase region, the ß grain size increases with the prolongation of the holding time and the increase of the holding temperature. The tissue growth rate of the a phase was higher than 1200°C in the cooling process after 1050°C incubation, which was 2.88 µm/s. Based on the heat preservation in the single-phase region, the second heat preservation was carried out for the two-phase region of Ti-6Al-4V titanium alloy at 850 °C and 900 °C. The study found that when the holding temperature was 850°C, the fastest growth rate of the a phase was 4.64 µm/s, which was greater than 3.29 µm/s when the holding temperature was 900°C. © Published under licence by IOP Publishing Ltd.

关键词： Aluminum alloys

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Latest development and application of FGD with organic amine in Pangang Group

Latest development and application of FGD with organic amine...

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2012 International Conference on Frontiers of Energy and Environmental Engineering, ICFEEE 2012

作者： Jianshan, W. Jianming, L. Zhengqiu, Q. Weijia, Z. Xiaolong, Z. Pangang Group Research Institute Co. Ltd. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua China

ISBN: (纸本)9780415661591

The operation of FGD system for the 173 m2 No. 6 sintering machine in Pangang Group is introduced. Through over two-years' process and equipment improvement, availability of the system working synchronously with the sintering machine reaches 85% with a desulfurization rate of above 88%. Following experimental research and field tests, the independently developed liquid desulfurizer for FGD has been put into industrial operation. © 2013 Taylor & Francis Group.

关键词： Desulfurization

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Head Curvature of Pure titanium Sheet Influenced by Process Parameters and Controlling in Hot Rolling Process

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Journal of Wuhan University of Technology(Materials Science) 2017年第2期32卷 444-450页

作者：于辉 LI Jun LIU Ligang 肖宏 College of Mechanical Engineering Yanshan University Qinhuangdao 066004 China National Engineering Research Center for Equipment and Technology of Cold Steel Rolling Yanshan University Qinhuangdao 066004 China State Key Laboratory for Comprehensive Utilization of Vanadium and Titanium Resources Ansteel Research Institute of Vanadium & Titanium (1ran&steel) Panzhihua 617000 China

We investigated the influences of process parameters on the head curvature of pure titanium sheet in hot rolling process and proposed the controlling means. First, the thermal simulation experiments for pure titanium TA1 were carried out to investigate the hot deformation behaviors of pure titanium in the temperature range of 700-800 ℃ with strain rate range of 1-20 S-1, and the processing map was established to determine optimized deformation parameters. Then, the finite element model has been constructed and used to analyze the effect of process parameters on the direction and severity of head curvature of pure titanium sheet. The process parameters considered in the present study include workpiece temperature, work roll diameter, pass reduction, oxide scale thickness of workpiece surface, and interface friction coefficient. The simulation results show that the workpiece temperature and the interface friction coefficient are the two main factors. The proposed controlling means was carried out on a hot rolling production line and solved the head curvature problem effectively. The rolling practices indicate that the rolling yield is improved greatly.

关键词： head curvature hot rolling process parameter thermal simulation pure titanium sheet

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Effect of coiling temperature and cold rolling reduction on planar anisotropy of Ti-alloyed low carbon steel

Effect of coiling temperature and cold rolling reduction on ...

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2nd International Conference on Materials Engineering, ICMEN 2014

作者： Zhang, Gong Ting Zheng, Zhi Wang Chang, Jun Pangang Group Research Institute Co. Ltd State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua Sichuan China

ISBN: (纸本)9783038351542

The effects of coiling temperature and cold rolling reduction on planar anisotropy of Ti -alloyed low carbon steel were investigated. The results show that as the coiling temperature increases from 509°C to 633°C the strength and elongation have little change, and the planar anisotropy trends to decrease. When coiling at 580°C to 640°C the value of planar anisotropy index (Δr) can be reduced to no more than 0.15. As the total cold rolling reduction increasing from 55% to 85%, the plastic strain ratio values (r-values) perpendicular to rolling direction increase firstly, then decrease;the change regulation of rolling direction is reverse, and the values of 45°direction nearly have no change. And the planar anisotropy can reach 0.07 as cold rolling at 75%. © (2014) Trans Tech Publications, Switzerland.

关键词： Low carbon steel

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Stable buildup of particles in a vibrating-pulsating high gradient magnetic separator: A simulation study

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Powder Technology 2025年

作者： Zixing Xue Rongjie Zhu Ning Wu Shuo Li Tao Xiong Luzheng Chen Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming 650093 China Jiangxi Provincial Key Laboratory of Magnetic Separation Equipment Ganzhou 34100 China State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Pangang Group of Panzhihua Iron & Steel Research Institute Co. Ltd. Panzhihua 617000 China

Vibrating-pulsating high gradient magnetic separation (VPHGMS) is a new technology developed from pulsating high gradient magnetic separation (PHGMS). It has higher selectivity than PHGMS due to the introduction of vibration into the matrix. However, previous research mainly focused on the separation performance of VPHGMS through experiments; few studies have concerned about its separation mechanism. In this study, a 2D simulation was applied to reveal the magnetic field distribution, flow field distribution, and particle buildup characteristics in a VPHGMS separator. It was found that the magnetic field distribution around the matrix did not change with the displacement of the matrix, but a much faster and stronger transformation of fluid velocity was observed in VPHGMS than in PHGMS. When the matrix was vibrating, some particles were able to follow its movement and occupied a stable buildup area in the upper and lower surfaces of the matrix. This area expanded with increasing magnetic field distribution, volume susceptibility, and diameter of particles, but shrank with increasing vibrating frequency. The selectivity of VPHGMS was also investigated by analyzing the separation performance on an idealized mixture of two minerals. The simulation results predicted a drop in recovery and an enhancement in selectivity under increased vibrating frequency, which was consistent with experimental results from former studies.

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Determination of the matrix element vanadium in the potassium metavanadate by inductively coupled plasma atomic emission spectrometry

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2013 International Conference on Materials, Mechatronics and Automation, ICMMA 2013

作者： Yong, Cheng Peng, Hui Xian Yuan, Jin Hong PanGang Group Research Institute Co. Ltd State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua 617000 Sichuan China

ISBN: (纸本)9783037857472

The potassium metavanadate samples were digested by hydrochloric acid and diluted with water to a constant volume, then the inductively coupled plasma atomic emission spectrometry (ICP-OES) was used to directly determine the content of 10 to 45% matrix vanadium. The matrix effects, spectral interference, background noise and other interference factors in the high concentration of potassium ions coexistence system were all examined in the paper. The results showed that although the coexisting alkali metal potassium significantly increased the ICP flame, the 1g/L potassium standard solution did not produce peaks in the scanning window of analysis line which substantially coincide with the reagent blank signal line, i.e., the 28% (or 0.28g/L) potassium contained in the potassium metavanadate did not interfere with the determination. Therefore, only the standard solution of vanadium was used to draw a calibration curve without the need of potassium matrix matching. In order to obtain a wide linear range and improve the detection precision and the accuracy of the matrix element vanadium, the sample dilution ratio and ICP spectrometer detection parameters were optimized, and the suitable sensitivity spectral lines and their detection integral and background correction regional were selected, the detection signal intensity of the high concentration vanadium is effectively regulated moderate, the detection range is covered from 10 to 45%, which fully meet the need for determination of vanadium in the potassium metavanadate (qualified products containing 37% vanadium). The results also showed that the background equivalent concentration is less than 5 μg/L, the relative standard deviation (RSD) is less than 1.0%, the detection results consistent with the redox titration method. The method is simple and fast, accurate and reliable, the precision is high. The inspection cycle is 10 to 15 minutes, which is greatly shorter than the chemical titration that takes 2 to 3 hours, so

关键词： Potassium

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utilization of steelmaking and hot-rolling mill waste

Utilization of steelmaking and hot-rolling mill waste

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

作者： Chen, Lian PanGang Group Research Institute Co. Ltd State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua 617000 Sichuan China

ISBN: (纸本)9783037855683

Based on the composition and characteristics of steelmaking dry-dedusting dust and oxide scale in hot-rolling mill, cold briquetting ores were processed by dust and oxide scale, and applied to converter vanadium recover. The research results show that, hot metal carbon oxidation rate and vanadium oxidation rate increased with the increased use of cold briquetting ores, and the TFe content of vanadium slag reduced, the consumption of iron and steel materials decreased. Not only can effectively use the steelmaking mill and hot-rolling mill waste, but also can improve the product quality of the converter vanadium recover. © (2013) Trans Tech Publications, Switzerland.

关键词： Hot rolling

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vanadium & titanium's Effects on High Strength Weathering Steel's Impact Toughness in CGHAZ

Vanadium & Titanium's Effects on High Strength Weathering St...

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2nd International Conference on Advanced Composite Materials and Manufacturing Engineering, CMME 2014

作者： Li, Da Dong Zhang, Tao Liu, Jin Yan Li, Jun PanGang Group Research Institute Co. Ltd State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua 617000 Sichuan China

ISBN: (纸本)9783038350651

The influence of impact toughness in vanadium-bearing high strength weathering steel's CGHAZ was researched by welding thermal simulation in this paper. The melting and precipitation situation of V, Ti and N in the high strength weathering steel was analyzed in the process of welding thermal simulation according to relative papers. According to the research, TiN in the steel plays a decisive role in CGHAZ on its impact toughness, and give a suggestion about the content of Ti in order to promote the tested steel's impact toughness in CGHAZ. © (2014) Trans Tech Publications, Switzerland.

关键词： Fracture toughness

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Microwave digestion - graphite furnace atomic absorption spectrometry determination of trace arsenic in the nano-titanium dioxide

Microwave digestion - graphite furnace atomic absorption spe...

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2013 3rd International Conference on Advanced Measurement and Test, AMT 2013

作者： Yong, Cheng PanGang Group Research Institute Co. Ltd State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization Panzhihua 617000 Sichuan China

ISBN: (纸本)9783037857168

The analysis method that the microwave digestion - graphite furnace atomic absorption spectrometry (GF-AAS) determination of trace impurity element arsenic in the nano-titanium dioxide has been built. It uses a mixture digestion reagent which is composed of a certain concentration and the proportion of hydrofluoric acid and nitric acid in the experiments, and then combined with high pressure microwave heating technology so as to quickly and completely digest the nano-titanium dioxide sample into solution. The composition and ratio and amount of the mixed digestion reagent, and the best microwave heating control program are all optimized in this paper, which not only solved the problem of the digestion of titanium dioxide and the loss of the analyte arsenic that is likely to be volatile in the high temperature digestion process, but also ensure that high content of titanium matrix in the low acidity solution is still existing in a stable complex ion form to avoid hydrolysis by complexation of the fluoride ion. Therefore, it can greatly reduce the detection affection of acidity and avoid the erosion of GF-AAS graphite tube. In order to eliminate the influence of the thermal stable titanium dioxide matrix on the determination of volatile trace element arsenic, the type of graphite tube, graphite furnace atomization procedures and atomic absorption spectrometer detection parameters all have been optimized through the matrix effect testing. The detection limit is 0.000 001% and the recovery rate is in the range of 93.0% to 106.0%. Otherwise, RSD is less than 9.36%, which is consistent with ICP-MS detection method. © (2013) Trans Tech Publications, Switzerland.

关键词： Absorption spectroscopy

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