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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......
-roasting and dilute acid solution leaching technology;while the vanadium-bearing crystalline phase existed in stone coal,the roasting additive must be added to destroy this crystalline form so... 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......
; (3) where (V2O5)c is a generic term for the vanadium bearing oxide in stone coal. The numerical values x and y in the product xNa2O·yV2O5 are correlative with roasting condition, and the product can...J. Cent. South Univ. Technol. (2011) 18: 1940-1944 DOI: 10.1007/s11771-011-0926-9 Extraction of vanadium from stone coal by modified salt-roasting process WANG Ming-yu(王明玉), WANG Xue-wen(王学文), SHEN......
Leaching vanadium by high concentration sulfuric acid from stone coal CHEN Xiang-yang(陈向阳)1, 2, LAN Xin-zhe(兰新哲)1, 2, ZHANG Qiu-li(张秋利)1, MA Hong-zhou(马红周)1, ZHOU Jun(周 军)1 1. School... can reach 95.86%. Key words: stone coal; vanadium; leaching; sulfate solution ____________________________________________________________________________________________ 1 Introduction Vanadium......
">The influence of roasting on the leaching rate and valence of vanadium was evaluated during vanadium extraction from stone coal.Vanadium in stone coal is hard to be leached and the leaching rate...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......
____________________________________________________________________________________________1 Introduction Vanadium-bearing stone coal is a type of carbonaceous shale with low calorific value. Currently, stone coal is widely used as a kind... Acid leaching of vanadium from roasted residue of stone coal ZHU Yang-ge(朱阳戈), ZHANG Guo-fan(张国范), FENG Qi-ming(冯其明), LU Yi-ping(卢毅屏), OU Le-ming(欧乐明), HUANG Si-jie(黄思捷) School of Resources......
cost. Key words: vanadium-bearing stone coal; roasting decarburization; mineralogy; preferential grinding; flotation 1 Introduction In China, stone coal is a specific vanadium-bearing resource... temperature, reactions like the oxidation of pyrite, combustion of carbon and calcite decomposition occurred successively in vanadium-bearing stone coal. At 600-700 °C, carbon and pyrite disappeared......
Mechanisms of aid-leaching reagent calcium fluoride in the extracting vanadium processes from stone coalFei Wang,Yi-Min Zhang,Jing Huang,Tao Liu,Yi Wang,Xiao Yang,Jie ZhaoCollege of Resources..., 1.5 mlg-1 , 15 vol % H2SO4 , and 5 % calcium fluoride (mass ratio of CaF2 to stone coal). The concentrations of hydrogen ion were adjusted from initial 1.82 and 4.79 mol L -1 to the pH of 1.80 ± 0.05......
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... of stone coal, and two-stage counter-current leaching on the vanadium leaching ratio were studied. The results show that the vanadium leaching ratio of roasted stone coal through two-stage counter......
and silicon; carbonation method; stone coal; vanadium ____________________________________________________________________________________________ 1 Introduction Stone coal ore is a kind of vanadium-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......
