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1. Effect of microwave irradiation on selective heating behavior and magnetic separation characteristics of Panzhihua ilmenite | |||
Zhao Wei,Chen Guo,Chen Jin,Peng Jinhui | |||
Metallurgical Engineering 27 December 2013 | |||
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Abstract:The influences of microwave irradiation on the surface characteristics of Panzhihua ilmenite were systematically investigated. The crystal structures, surface morphology and surface chemical functional groups of ilmenite were characterized before and after microwave irradiation and magnetic separation for different microwave treatment times by using various methods, such as XRD, SEM, and FT-IR, respectively. XRD analysis showed that the microwave treated ilmenite has the strongest peaks of phase more than that of raw samples, indicates that the crystalline compound of ilmenite increased with the microwave irradiation time. SEM analysis showed the micro-cracking appeared at many grain boundaries of ilmenite after being pretreated by microwave treatment. The separations of ilmenite from gangue minerals were completed and the micro-fissure within ilmenite minerals were also formed, which could be attributed to the microwave selective heating characteristics of the different minerals and compounds, and the thermal stresses were caused by the uniform heat rate disturbed under microwave irradiation. The mineral processing results showed that the magnetic separation characteristics and properties of microwave treated ilmenite samples were better than that of microwave untreated ilmenite samples. It was concluded that microwave irradiation can be applied effectively and efficiently to the irradiation processes of Panzhihua ilmenite. | |||
TO cite this article:Zhao Wei,Chen Guo,Chen Jin, et al. Effect of microwave irradiation on selective heating behavior and magnetic separation characteristics of Panzhihua ilmenite[OL].[27 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4579026 |
2. Numerical Simulation of Multiphase Flow in Vanyukov Furnace | |||
ZHANG Hongliang,CHEN Yongming | |||
Metallurgical Engineering 28 October 2013 | |||
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Abstract:The multiphase flow of widely used Vanyukov furnace was numerically studied. An unsteady three-dimensional and three-phase flow model was firstly built by Computational Fluid Dynamics (CFD) software ANSYS FLUENT?, and then solved with Volume of Fluid (VOF) and - model. The results showed that the proposed model could be used to predict the multi-phase movement, the slag/air fluctuation, the vortex formation and effects of structural and operational parameters. By Fast Fourier Transform(FFT), the dominant frequency of density with time signal was calculated, which was 0.29 Hz. The analysis of different injection flow rates of enriched air indicated that it has huge effect on the mean slag velocity. The peak mean velocity changed from 2.17 to 4.99 m/s while the flow rate of enriched air varied from 70 to 160 m/s. The proposed model provided a method to optimize the furnace structure and operating conditions for the best furnace performance and lowest energy consumption. | |||
TO cite this article:ZHANG Hongliang,CHEN Yongming. Numerical Simulation of Multiphase Flow in Vanyukov Furnace[OL].[28 October 2013] http://en.paper.edu.cn/en_releasepaper/content/4566463 |
3. Research on the reducing product of carbonthermal reduction of ilmenite ores | |||
Song Zengkai,Chen Guo,Chen Jin,Peng Jinhui | |||
Metallurgical Engineering 17 April 2013 | |||
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Abstract:In this present study, the reducing products of carbonthermal reduction of ilmenite ores were evaluated. The crystal structures, microstructure and surface chemical functional groups of the ilmenite ores and the reducing product of carbonthermal reduction were also analyzed using XRD, SEM, Raman and FT-IR, respectively. Sulphate titanium slag and high titanium slag were the major reducing products of carbonthermal reduction of ilmenite ores. It was found that the low-valent titanium of high titanium slag was increased after carbonthermal reduction of ilmenite ores with higher temperature and longer processing time. Based on the results, this method could be applied effectively and efficiently way for both utilization of ilmenite ores and preparation of sulphate titanium slag and high titanium slag. | |||
TO cite this article:Song Zengkai,Chen Guo,Chen Jin, et al. Research on the reducing product of carbonthermal reduction of ilmenite ores[J]. |
4. Removal of Fluoride and Chloride from Zinc Oxide Dust | |||
Jin Bingjie,Zhang Yuhui,Huang Shihong | |||
Metallurgical Engineering 29 January 2013 | |||
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Abstract:Removal of fluoride and chloride from zinc oxide dust from ausmelt furnace were investigated using alkaline washing. The results show that F removal efficiency increase with an increase of alkaline concentration, alkaline washing temperature and time, but Cl removal efficiency as opposed to F removal efficiency. The L/S ratio has little effect on F and Cl removal efficiency. A new flowsheet for removal of fluoride and chloride from the secondary zinc resource was successfully proposed according to the results. F and Cl removal efficiency are more than 53.68% and 63.18% respectively using the flowsheet under optimum parameters of temperature 60 - 70 ℃, L/S ratio 3:1 and alkaline washing time 1.5h. | |||
TO cite this article:Jin Bingjie,Zhang Yuhui,Huang Shihong. Removal of Fluoride and Chloride from Zinc Oxide Dust[OL].[29 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4510214 |
5. Adsorption of Pb2+ and Zn2+ from aqueous solutions by sulfured orange peel | |||
Guo Xueyi,Liang Sha,Tian Qinghua | |||
Metallurgical Engineering 07 December 2010 | |||
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Abstract:In this study, sulfured orange peel (MOP) was used as adsorbent to investigate its adsorption behaviors of lead and zinc ions from aqueous solutions. The effects of solution pH, adsorption time and metal ion concentration on adsorption were studied in batch experiments. Both adsorption kinetics of Pb2+ and Zn2+ proceeded rapidly and could be well described by pesudo-second-order equation. The maximum Langmuir adsorption capacities for Pb2+ and Zn2+ removal by MOP were evaluated as 163.93 and 80.06 mg/g, respectively. A binary mixture of Pb2+ and Zn2+ was studied by using a packed column, suggesting that effective mutual separation and pre-concentration of Pb2+ away from Zn2+ using MOP could be satisfactory achieved. The results indicate that sulfured orange peel could be employed as an effective low-cost adsorbent for adsorption and separation of Pb2+ and Zn2+ from wastewater. | |||
TO cite this article:Guo Xueyi,Liang Sha,Tian Qinghua. Adsorption of Pb2+ and Zn2+ from aqueous solutions by sulfured orange peel[OL].[ 7 December 2010] http://en.paper.edu.cn/en_releasepaper/content/4395638 |
6. Study on Separation Technology of Pr and Nd in D2EHPA-HCl-LA Coordination Extraction System | |||
Yin Shaohua,Wu Wenyuan,Bian Xue | |||
Metallurgical Engineering 16 November 2010 | |||
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Abstract:The separation coefficient of Nd /Pr was lower in D2EHPA -HCl system. Pointing to this problem, the effect of the acidity of feed and the concentration of lactic acid on the distribution ratio, separation coefficient and extraction capacity were investigated in unsaponified D2EHPA -HCl-LA system,and the regression equations were calculated in this paper. The results showed that the distribution ratio and separation coefficient both increased with decreasing of feed acidity and increasing of the lactic acid concentration, and the extraction capacity increased with increasing of lactic acid concentration in D2EHPA -HCl-LA system. When the feed acidity pH=3.5 and lactic acid concentration was 0.3mol/L, the max separation coefficient was 1.57, and the extraction capacity was 27.87g/L. | |||
TO cite this article:Yin Shaohua,Wu Wenyuan,Bian Xue. Study on Separation Technology of Pr and Nd in D2EHPA-HCl-LA Coordination Extraction System[OL].[16 November 2010] http://en.paper.edu.cn/en_releasepaper/content/4391810 |
7. Kinetics of Mixed Rare Earths Minerals Decomposed by CaO with NaCl-CaCl2 Melting Salt | |||
Bian Xue,Wu Wenyuan | |||
Metallurgical Engineering 15 November 2010 | |||
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Abstract:For increasing reaction rate and reducing decomposing temperature, TG-DTA, XRD, SEM and Chemical analysis were used to study the kinetics of mixed rare earths minerals decomposed by CaO with NaCl-CaCl2. The results showed that the reaction rate increased with increasing of NaC-CaCl2 addition, CaO addition, and decomposition temperature. The kinetics of mixed rare earths minerals decomposed by CaO conformed to 1-2/3X-(1-X)2/3=kdt mode. The decomposition reaction rate was controlled by two steps, and the activation energy was decreased with adding of NaCl-CaCl2 melting salt. The micro-pattern of products was loosening and porous with NaCl-CaCl2 in decomposition system. | |||
TO cite this article:Bian Xue,Wu Wenyuan. Kinetics of Mixed Rare Earths Minerals Decomposed by CaO with NaCl-CaCl2 Melting Salt[J]. |
8. SUBSTANCE FLOW ANALYSIS OF LEAD IN CHINA | |||
Guo Xueyi,Zhong Juya,Song Yu,Tian Qinghua | |||
Metallurgical Engineering 04 February 2009 | |||
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Abstract:The method of Substance Flow Analysis (abbreviated as SFA) provides a helpful tool for the study of the industrial metabolism of a certain metal within a regional level. Lead is one of the important strategic commodities of national economic development in China. In this work the flow of lead in China, 2006, was traced within the STAF model, and the situation of production, consumption and recycling of lead resources in China were introduced. The SFA is performed on lead flows during its one year life cycle in detail, and several main average indexes from 2000 to 2006 were calculated as following: PZ=79.28%、PS=19.08%、MZ=148.91%、MS=30.25%、R=0.8349t/t and S=0.1949t/t. As one of the biggest producer and consumer of lead in the world, from a long-term point of view, China is still facing the problem on depletion of lead resources. How to increase the resource efficiency is a significant issue for lead industry of China. Based on the result, several advices were proposed in the paper, aiming to contribute important reference information for the industrial metabolism and resource management and recycling of lead industry in China. | |||
TO cite this article:Guo Xueyi,Zhong Juya,Song Yu, et al. SUBSTANCE FLOW ANALYSIS OF LEAD IN CHINA[OL].[ 4 February 2009] http://en.paper.edu.cn/en_releasepaper/content/28406 |
9. SUBSTANCE FLOW ANALYSIS OF ZINC IN CHINA | |||
Guo Xueyi,Zhong Juya,Song Yu,Tian qinghua | |||
Metallurgical Engineering 27 January 2009 | |||
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Abstract:The method of Substance Flow Analysis (abbreviated as SFA) provides a helpful tool for the study of the industrial metabolism of a certain metal within a regional level. Zinc is one of the important strategic commodities of national economic development in China, the resources utilization and recycling of which is important for the sustainable development of China\ | |||
TO cite this article:Guo Xueyi,Zhong Juya,Song Yu, et al. SUBSTANCE FLOW ANALYSIS OF ZINC IN CHINA[OL].[27 January 2009] http://en.paper.edu.cn/en_releasepaper/content/28320 |
10. Study on CaO decomposing bastnaesite in assistant of NaCl-CaCl2 | |||
Bian Xue,Wu Wenyuan,Chang Hongtao,Peng Kewu,Xu Jingyu,Sun Shuchen, Tu Ganfeng | |||
Metallurgical Engineering 20 November 2006 | |||
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Abstract:Now in process of bastnaesite decomposed, fluorine gives out as gas phase. Therefore, fluorine resource is wasted, and the environment is also polluted. In order to find new cleaning metallurgy method, the decomposition reactions of heading mineral roasting by CaO-NaCl-CaCl2 are studied by means of TG-DTA and XRD methods. The relationship between decomposition ratio and four factors is studied by the quadratic regression orthogonal analysis, and then the regression equation is obtained. The optimum process conditions are obtained as follows: roasting temperature: 700℃, CaO addition: 15%, NaCl-CaCl2 addition: 10%, roasting time: 60min, the decomposition ratio: 92.14%. Through analysis, because CaO is added, fluorine exists in roasting products as CaF2 solid, and the formation of gas phase fluorine is restrained. Thus it is shown that the method is a cleaning metallurgy technology in this thesis. | |||
TO cite this article:Bian Xue,Wu Wenyuan,Chang Hongtao, et al. Study on CaO decomposing bastnaesite in assistant of NaCl-CaCl2[OL].[20 November 2006] http://en.paper.edu.cn/en_releasepaper/content/9708 |
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