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Flow-injection spectrophotometric determination of vanadium with malachite green oxalate by bromate in acidic and micellar mediumMohsen Keyvanfarda1,Narges Abedib21. Faculty of Science,Majlesi Branch,Islamic Azad University2. Group of Chemistry,Shahreza Branch,Islamic Azad University摘 要:A flow injection method is proposed for determining vanadium(V......
Investigation on Exfoliation Corrosion and Neutral Salt Spray Corrosion Resistanceof Al-6Mg Alloy with Addition of Scandium WANG Yue1 (1.Luoyang Ship Material Research Institute, Luoyang 471039, China) 摘要:Al-6Mg-Sc alloy was prepared by means of melting-casting. Corrosionresistance of Al-6Mg-Sc alloy was studied in exfoliation corrosion and Neutral Salt Spray Test. Microstructure......
铝酸钠溶液沉钒渣中钒的湿法回收冯其明1,邵延海2,欧乐明1,张国范2,卢毅屏2(1.湖南省长沙市中南大学资源加工与生物工程学院2.昆明理工大学 国土资源工程学院,昆明 650093)摘 要:通过沉钒渣物相分析,提出从沉钒渣中回收钒的浸出-净化-铵盐沉钒湿法工艺.结果表明,采用碳酸氢钠浸出沉钒渣,在NaHCO3与Ca3(VO4)2摩尔比为11,反应温度80℃,反应时间45min,固液比1∶4,搅拌速度800r/min条件下,钒的浸出率达96.4%.含钒浸出液中分步添加30%硫酸和硝酸镁,Al,Si,P,As等杂质......
shaking ladle process, hot metal ladle process and converter process [3-4]. The representative vanadium extraction route mainly consists of the following procedures: sodium salt roasting, water leaching, solution purification and V precipitation [5]. It is well known that oxidation roasting is a key stage in the whole process of vanadium extraction. The objective of salt roasting is to convert......
Precipitation Characteristics and Mechanism of Vanadium Carbides in a V-Microalloyed Medium-Carbon SteelXiao-Lin Pan1,Minoru Umemoto21. School of Metallurgy, Northeastern University2. Department of Mechanical Engineering, Toyohashi University of Technology摘 要:The precipitation characteristics and mechanism of vanadium carbides during isothermal......
solution[J]. Hunan Nonferrous Metals, 2011, 27(3): 15-19. [28] LI He, LIU Xu-heng, HE Li-hua. Thermodynamic study on vanadium precipitation with calcium salt[J]. Rare Metals and Cemented Carbides, 2014, 42...淀效果 Fig. 8 Precipitation effect of vanadium at different Ca2+ additive amounts 2.4 镓电积 离子交换富集过程后,溶液中镓浓度达到1~2 g/L,满足电解沉积工艺中溶液中镓的提取要求,碱溶液中镓的电积总反应如下[30]: ......
Vanadium Carbide Coating Growth on Die Steel Substrate in Borax Salt Bath王洪福School of Materials Science and Engineering, Wuhan University of TechnologySchool of Mechanical Engineering and Automation, North University of China摘 要:Vanadium pentoxide, borax, boron carbide and sodium fluoride were used to grow vanadium carbide coating on die steel(Cr12......
, such as chemical precipitation [12], solvent extraction [13-16] and ion exchange [17-21]. Precipitating molybdenum from acidic solution requires a large amount of alkali to neutralize the acid... M, FERNANDEZ L A, MADARIAGA J M. Selective extraction of vanadium (V) from solutions containing molybdenum (Vi) by ammonium salts dissolved in toluene [J]. Solvent Extraction and Ion Exchange, 2007......
Recovery and separation of Fe and Mn from simulated chlorinated vanadium slag by molten salt electrolysisShi-yuan Liu1,2,Yu-lan Zhen2,Xiao-bo He3,Li-jun Wang1,Kuo-chih Chou31. Collaborative..., Chinese Academy of Sciences3. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing摘 要:Tailings from the vanadium......
, and to promote the precipitation of V(C,N) obviously. Thus the microalloying with RE and V leads to raising the strength and toughness of steel. Key words:rare earths; vanadium; precipitation...Effects of RE and Vanadium on Microalloyed Steel 王怀斌1,贾连弟1,唐历1,林勤2,宋波2,卢先利3 (1.Panzhihua Iron and Steel (Group;2.Department of Physical Chemistry, University of Science and Technology Beijing......
