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Roasting and leaching behaviors of vanadium and chromium in calcification roasting–acid leaching of high-chromium vanadium slagJing Wen1,Tao Jiang1,2,Mi Zhou1,2,Hui-yang Gao1,Jia-yi Liu1,Xiang-xin...–acid leaching of high-chromium vanadium slag(HCVS)was conducted to elucidate the roasting and leaching behaviors of vanadium and chromium.The effects of the purity of Ca O,molar ratio between Ca O......
Trans. Nonferrous Met. Soc. China 24(2014) 1273-1288 Research and prospect on extraction of vanadium from vanadium slag by liquid oxidation technologies Zhong-hang WANG1,2, Shi-li ZHENG1, Shao-na... media including the NaOH/KOH sub-molten salt media and the NaOH-NaNO3 binary molten salt medium, for the extraction of vanadium and chromium from the vanadium slag have been developed. In comparison......
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......
; 文献标识码:A Dissimilatory reduction process of vanadium(V) in metallurgical wastewater by Rhodoferax ferrireducens LI Hao-ran1, FENG Ya-li2, ZOU Xiao-yan2, LUO Xiao-bing2 (1. State Key... that adequate vanadium can promote the growth of microbes, and the tendency and cycle of R.f growth are essentially the same as that of V5+ reducing. In beginning period, the bioeffect of vanadium compound......
A new process of extracting vanadium from stone coalYan-hua Liu~(1,2)),Chao Yang~(1)),Pei-you Li~(2)),and Shi-qi Li~(1)) 1) Metallurgical and Ecological Engineering School,University of Science... vanadium from the stone coal vanadium ore in Fangshankou,Dunhuang area of Gansu Province, China was introduced.Various leaching experiments were carried out,and the results show that the vanadium ore......
制酸废催化剂回收钒王晓丹1,朱云1(1.云南省昆明市昆明理工大学材料与冶金工程学院)摘 要:用硫酸浸出-P204萃取工艺从制酸废催化剂中回收钒.结果表明,在浸出条件为硫酸浓度50g/L,液固比2∶1,时间30min时,钒的浸出率可达95%.浸出液经过P204萃取,饱和NaHCO3溶液反萃,反萃液净化,铵盐沉钒,偏钒酸铵热分解后得到了合格的V2O5.关键词:冶金技术; 钒; 硫酸浸出; 制酸废催化剂......
which contained vanadium was obtained by spray drying, and the nanometer V8C7 powder was prepared through reduction/carbonization of the precursor powder. The technological process was investigated... transformation from V2O3 into VO phase. Key words: vanadium carbide; nanometer; spray dried; reduction/carburization; grain growth inhibitor V8C7粉末由于其具有一些特殊的性能在冶金, 电子学, 催化剂等领域得到广泛的应用[1-9]. 制备......
: Vanadium (III) phosphate monoclinic VPO4·H2O was synthesized hydrothermally. The ε-VOPO4 nanosheets, formed by the oxidative de-intercalation of protons from monoclinic VPO4·H2O, can reversibly...-ion battery; nanosheet; vanadium phosphate; cathode material; synthesis; characterization 1 Introduction During the past decade, the energy shortage and the environment pollution have become serious due......
Effects of trace addition of vanadium and depression amount on recrystallization temperature and mechanical performance of 5182 belts GAO Jia-cheng(高家诚)1, CHEN Zhi-qiang(陈志强)1, MING Wen-liang(明文良... was also discussed. Keywords: 5182 belts; vanadium; recrystallization temperature; mechanical performance 1 Introduction The 5××× series aluminum alloys which cannot be strengthened by heat treatment......
盐细菌对锰渣中有效硅的淋洗效果较好,但体系pH为7时有效硅的淋洗量最大,这与本文研究结果相似. 图2 初始pH对B.M菌淋洗体系钒和铜淋出率的影响 Fig. 2 Effect of initial pH on leaching rate of vanadium and copper in B.M bacterial leaching system 2.2 溶氧量对B.M菌淋洗尾渣中钒和铜的影响...散,致使菌体与矿物接触受阻,影响释钾效率. 图4 摇床转速对B.M菌淋洗体系钒和铜淋出率的影响 Fig. 4 Effect of shake speed on leaching rate of vanadium and copper in B.M bacterial leaching system 图5 蔗糖添加量对B.M菌淋洗体系菌种生长量和pH的影响 Fig. 5 Effect......