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is less than 10% when the raw ore is leached by 4 molL H 2 SO 4 at 90℃ for 2 h.After the sample is roasted at 900℃ for 2 h,the leaching rate of vanadium reaches the maximum,and more than 70% of vanadium...Effects of the mineral phase and valence of vanadium on vanadium extraction from stone coalYang-jia Hu 1),Yi-min Zhang 1,2),Shen-xu Bao 1,2),and Tao Liu 1,2) 1) College of Resources and Environmental......
">A water cooling treatment was applied in the coal-based reduction of high-chromium vanadium and titanium(V–Ti–Cr) iron ore from the Hongge region of Panzhihua, China. Its effects on the metallization...Application of a water cooling treatment and its effect on coal-based reduction of high-chromium vanadium and titanium iron oreSong-tao Yang1,2,Mi Zhou1,2,Tao Jiang1,2,Shan-fei Guan1,Wei-jun......
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...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......
. (in Chinese) [24] ABDEL-AAL E A. Kinetics of sulfuric acid leaching of low grade zinc silicate ore [J]. Hydrometallurgy, 2000, 55(3): 247-254. [25] LOZANO L J, JUAN D. Leaching of vanadium from spent...J. Cent. South Univ. Technol. (2011) 18: 399-405 DOI: 10.1007/s11771-011-0710-x Leaching kinetics of acid-soluble Cr(VI) from chromite ore processing residue with hydrofluoric acid LI Xiao-bin(李小......
硅质石煤钒矿无污染氧化剂氧化-酸浸法提钒工艺研究孙德四1,孙剑奇1,张贤珍1(1.江西省九江市九江学院化学化工学院江西省鄱阳湖生态经济研究中心)摘 要:通过单因素条件试验确定了"氧化剂氧化-硫酸浸出提钒工艺"的最优工艺参数.试验结果表明,在氧化剂二氧化锰用量为5%,硫酸浓度为40%,浸出温度为90℃,矿物粒度-74μm,浸出时间为9h,液固比为2.5∶1的条件下,钒的浸出率可达72.4%.比起传统的钠化焙烧工艺高出10%以上.关键词:硅质石煤钒矿; 氧化剂; 酸浸出; 提钒......
; one is the vanadium and titanium magnetite ore, and the other is stone-coal ore. Stone-coal is carbonaceous shale that contains vanadium[4-8]. In China, the gross reserve of vanadium in stone-coal... researches[10-14] indicated that only V3+ and V4+ were found in stone-coal generally, and V2+ and V5+ were barely found. Vanadium in the ore from major locality was mostly in the form of V3+ except......
and silicon; carbonation method; stone coal; vanadium ____________________________________________________________________________________________ 1 Introduction Stone coal ore is a kind of vanadium... ____________________________________________________________________________________________ Abstract: The effects of reaction time, reaction temperature, stirring speed and flowrate of CO2 gas on desilication rate and loss rate of vanadium were......
; vanadium titanomagnetite; vanadium distribution ratio; electric-furnace titanium slag; MgO 1 Introduction Vanadium titanomagnetite ore serves as an important feedstock for production of vanadium [1.... These findings will support the development of the DR-EF process for the comprehensive utilization of vanadium titano- magnetite ore. 2 Experimental 2.1 Materials and methods The raw material for producing......
simulation of coupled thm process in surrounding rock mass of nuclear waste repository in argillaceous formationJIANG Zhong-ming(蒋中明)1, 2, HOXHA Dashnor2, HOMAND Fran?oise2, CHEN Yong-gui(陈永贵)3(1...) coupling phenomena of a surrounding rock mass in an argillaceous formation, a nuclear waste disposal concept in drifts was represented physically in an in-situ test way. A transversely isotropic model......
Thermodynamic studies on gas-based reduction of vanadium titano-magnetite pelletsJun-wei Chen,Yang Jiao,Xi-dong Wang摘 要:Numerous studies have focused on the reduction thermodynamics of ordinary iron ore; by contrast, the literature contains few thermodynamic studies on the gas-based reduction of vanadium titano-magnetite(VTM) in mixed atmospheres of H2......