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refinery catalysts using sulfur oxidizing lithotrophs [J]. Hydrometallurgy, 2007, 88(1/4): 202-209. [12] Bin Zhi-yong. Progress of the research on extraction of vanadium pentoxide from stone coal... of the important vanadium sources in China. The brief flow of the classical process leaching vanadium from stone coal includes chloridizing roasting, water leaching, deposition, alkali melting and thermal......
, LU Yi-ping. Mechanism of oxidizing roasting process of vanadium containing stone coal [J]. The Chinese Journal of Nonferrous Metals, 2009, 19(1): 195-200. (in Chinese) [20] CHEN Tie-jun, QIU Guan... of 0.45% of H2SO4, 30 ℃ for 1 h with a liquid-to-solid ratio of 2 mL/g. Leaching after an oxidation roasting treatment is an efficient way to leach vanadium from the residue of stone coal, which has some......
attracted more and more attentions. The traditional vanadium extraction technique from stone coal is roasting with a source of sodium chloride under oxidizing conditions in a flat kiln, and then vanadium... processes have been proposed to recover vanadium from stone coal, such as oxidizing roasting-alkaline leaching [3], dilute sulfuric acid leaching [4], calcium salt roasting-sulfuric acid leaching [5......
Valency Study of Vanadium in Stone Coal of Southern ChinaXu Guozhen;Ge Nai’e;Chen Jianping;Shen Shaobo Chinese University of Geosciences,Beijing 100083摘 要:<正> Vanadium-bearing stone coal is a new resource of vanadium. V in stone coal mainly exists in three oxidation states: 7.84%V(Ⅲ), 72.08% Ⅴ(Ⅳ) and 20.08% Ⅴ(Ⅴ). The change and distribution......
of vanadium by high-carbon stone coal fluidized through oxidizing roasting WANG Ping1, FENG Ya-li1, LI Hao-ran2, LIU Xin-wei1, ZHANG Ping1 (1. School of Civil and Environmental Engineering, University...) Abstract: In order to enhance the leaching rate of vanadium, the fluidized oxidizing roasting was adopted to pretreat the high-carbon stone coal from Guangxi province, China. The thermodynamics......
with vanadium to form Ca(VO3)2, Ca2V2O7 and Ca3(VO4)2orderly during the stone coal roasting process and high temperature is beneficial to the reactions between calcium and vanadium, which was validated...Effect of Calcium on the Vanadium Extraction from High Calcium Type Stone Coal包申旭1,2,LIANG Liang1,张一敏1,2,HAN Shihua1,HU Yangjia11. College of Resources and Environmental Engineering, Wuhan University......
Leaching of vanadium from stone coal with sulfuric acidWANG Mingyu, XIAO Liansheng, LI Qinggang, WANG Xuewen, and XIANG Xiaoyan School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China摘 要:The effects of roasting, mass ratio of H2SO4 to stone coal, leaching temperature, liquid-to-solid ratio, grinding fineness......
-contained carbonaceous shale[1]. During the past decades, technical progress on leaching vanadium from stone coal mainly focuses on the diversity of roasting additives and selection of suitable leaching... the technology of leaching vanadium from roasted stone coal with NaOH solution includes oxidation roasting, alkaline leaching, purification, enrichment of vanadium and preparation[1]. In the process......
Vanadium Resource摘 要:Experiments comparing microwave blank roasting and conventional blank roasting for typical vanadium-bearing stone coal from Hubei...Comparison of the mechanisms of microwave roasting and conventional roasting and of their effects on vanadium extraction from stone coalYi-zhong Yuan1,2,Yi-min Zhang1,2,Tao Liu1,2,Tie-jun Chen1,21......
and Engineering,Central South University,Changsha 410083,China摘 要:<正>The extraction technology of vanadium from stone coal by means of no-salt-roasting and dilute... the present study,the effects of vanadium occurrence state in stone coal,roasting temperature and additive agent on the leach- ing efficiency of vanadium were studied.The results indicate that the effect......