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检索条件"机构=State Key Laboratory of Vanadium and Titanium Resource Comprehensive Utilization"

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

Determination of the matrix element vanadium in the potassiu...

引用

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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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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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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Research on nitrogen control technology of high-pressure bottle steel

Research on nitrogen control technology of high-pressure bot...

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2nd International Conference on Material, Mechanical and Manufacturing Engineering, IC3ME 2014

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

ISBN: (纸本)9783038351740

Nitrogen content of the high-pressure bottle steel was high and with big fluctuation, it is difficult to control. SO, investigation on nitrogen content of the all steelmaking process is carried out. Results of the investigation indicated that nitrogen content of the aimed steel was high, nitrogen absorption was mainly happened during tapping and in the course of after refining to before casting. And then nitrogen control measures such as low-nitrogen steel melting technology, optimization of deoxidization, protective casting technology is raised. After that nitrogen content of the aimed steel was reduced and nitrogen absorption during tapping and in the course of after refining to before casting was effectively controlled, nitrogen content of the finished steel was stably controlled in 50×10-6, the effect of nitrogen on property of steel is reduced. © (2014) Trans Tech Publications, Switzerland.

关键词： Bottles

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Analysis of the mineralogical characteristics at different temperature in the process of roasting vanadium slag

Analysis of the mineralogical characteristics at different t...

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2014 3rd International Conference on Intelligent System and Applied Material, GSAM 2014

作者： Shi, Zhi Xin Liu, Jin Yan Cai, Xiao Wen Yuan, Tian Yu PanGang Group Research Institute Co. Ltd. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization National Quality Supervision and Testing Center of Vanadium and Titanium Products Panzhihua 617000 China

ISBN: (纸本)9783038350361

Through the scanning electron microscope and energy spectrum analysis of vanadium slag after calcination at different temperatures of Panzhihua Iron and steel in industrial production, analyzed the change of morphology and composition of the various main phase, Focuses on the change process of two main vanadium containing phase which are vanadium spinels and calcium vanadate. The vanadium spinels into calcium vanadate optimal temperature range is 800 ~ 900 °C, and provides a theoretical basis for the extraction process of vanadium, which can further improve the industrial production of vanadium. © (2014) Trans Tech Publications, Switzerland.

关键词： Calcium

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The influence of rutile nano-TiO2 on paint ultraviolet resistance

The influence of rutile nano-TiO2 on paint ultraviolet resis...

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2012 3rd International Conference on Manufacturing Science and Technology, ICMST 2012

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

ISBN: (纸本)9783037855638

Rutile nano-TiO2 was modified with surfactant to improve its dispersion in organic solvents. The modified nano- TiO2 was used in furniture paint, anticorrosive paint and automotive paint. The ultraviolet resistance of the paint was knowed by detecting the color difference and gloss loss rate of the paint. The results show that: the nano-TiO2 which is modified with B/C surfactant has excellent dispersion in paint. And it shows excellent ultravioleting performance in paint applications. The paint color and gloss can be maintained for a longer time. © (2013) Trans Tech Publications, Switzerland.

关键词： Surface active agents

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A study on the comparison of the several typical processes for dealing with vanadium titanium magnetite resources

A study on the comparison of the several typical processes f...

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International Conference on Energy and Environmental Engineering, ICEEE 2014

作者： Qin, Jie Liu, Gong Guo Li, Zhan Jun Qi, Jian Ling Pangang Group Research Institute Co. Ltd. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization PanzhihuaSichuan China

ISBN: (纸本)9781138026650

Processes of dealing with vanadium titanium magnetite have been reviewed by three different enterprises, i.e. The New Zealand Steel, Highveld Steel & vanadium Corp Ltd in South Africa and Panzhihua Iron and Steel Corporation in China.A process of rotary kiln direct reduction+EAF smelting DRI+recovering vanadium from vanadium bearing hot metal is adopted by the New Zealand Steel and Highveld Corporation. However, this process only recovers the Fe and V elements in the iron ore, whilst the Ti element in the EAF slag is difficult to extract because of the low grade TiO2. A process of rotary hearth furnace (RHF) direct reduction+EAF deep reduction+vanadium recovery is employed by Panzhihua Iron and Steel Corporation, and there are no other materials except for DRI and reductants that are added into EAF, resulting in above 45% TiO2 content in the slag, which is higher than that of the other corporations. Moreover, the Ti element in the slag could be extracted by the traditional sulfuric acid method. By comparison to the former process, the latter explores a new way to recover the Fe, V and Ti elements in the vanadium titanium magnetite. Furthermore, the direct reduction processes described in this article are constructive for comprehensive recovery of the vanadium titanium magnetite, as well as other similar composite ore resources. © 2015 Taylor & Francis Group, London.

关键词： Slags

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The corrosion research of HR160 superalloy at 700 ? molten KCl-MgCl2 with air atmosphere 2

The corrosion research of HR160 superalloy at 700 ? molten K...

引用

2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control, METMS 2022

作者： Zeng, Zeyao Zhao, Jiqing Yang, Gang Luo, Xu State Key Laboratory of Vanadium Titanium Resources Comprehensive Utilization Sichuan Panzhihua617000 China Central Iron and Steel Research Institute Beijing100081 China

ISBN: (纸本)9781510654778

The nuclear power molten salt reactor of heat storage metal tank and fluid pipe are usually consumed by corrosion in high temperature chlorinated environment, and the structure material thickness design reference for the corrosion rate is critical. This work focused the compatibility study of high Cr-Co-Ni-Si type HR160 superalloy with molten KCl-MgCl2/air corrosion at 700 ? for 4-240 h. By XRD, SEM and OM observation analysis and mass recording curves showed that the corrosion rates curve of HR160 was parabolic in 96 h, the corrosion rate was in the range of 1~2.5 mm/a between 15~63 µm uniform corrosion product layer in 96 h. The mass loss was mainly due to the oxidative chlorination of Cr elements, and the outer shell layer was a porous film structure of MgCr2O4 corrosion products peeled off by the corrosion products with the growth of immersion corrosion time. The second outer uniform corrosion product layer was dominated by Mg2SiO4 and Si oxidation reaction. Low viscosity molten salt through the porous at high temperature, sparse corrosion products layer continues to contact with the substrate uniform corrosion, and the reaction generated by the high mobility of chlorine gas, which penetrate the oxidation layer and the formation of low melting point volatile metal chloride with the alloy. © 2022 SPIE

关键词： Corrosion rate

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Low alloy steel materials parsed new technology - Spark spectroscopy analysis of oxide inclusions

Low alloy steel materials parsed new technology - Spark spec...

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Materials Science and Technology Conference and Exhibition 2013, MS and T 2013

作者： Xu, Benping PanGang Group Research Institute Co. Ltd. State Key Laboratory of Comprehensive Utilization of Vanadium and Titanium Resources National Quality Supervision and Testing Center of Vanadium and Titanium Products Panzhihua 617000 Sichuan China

ISBN: (纸本)9781629933092

Using a spark direct reading spectrometer analysis of oxide inclusions in low alloy steel, and establish a new qualitative analysis methods, to meet the low-alloy steel oxide inclusions rapid profiling and quick analysis requirement in the blast furnace, create the conditions for clean steel smelting. Scientific and rational software, established a spark direct reading spectrometer analysis of low alloy steel samples of oxide inclusions (SiO2, Al 2O3, MnO, TiO2, CaO, Cr2O 3, MgO). Using ARL4460 direct reading spectrometer the SPARK-DAT data acquisition system, oxygen analysis channels and independent development of spectral analysis software to solve the fixed-point analysis of the problem of the spectral content of oxide inclusions provide strong technical support for the low-alloy steel samples analyzed. Copyright © 2013 MS&T'13®.

关键词： Alloy steel

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