| Valency Study of Vanadium in Stone Coal Ash of Jiangxi Province |
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| 作者单位： | Xu Guozhen Ge Naie Li Jigui
Department of Basic Courses，China University of Geosciences，Beijing 100083 |
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| 摘 要： | Vanadium-bearing stone coal is a new vanadium resource;recovery ofV_2O_5 from the coal has been investigated.It has been found that a satisfactoryextraction of V_2O_5 depends on both the oxidation of V and its reaction with so-dium salt.V in the coal ash of Yushan mainly exists in two oxidation states:98％V(Ⅲ)and2％V(Ⅳ).The distribution of valency of V shows that organicmatter determines V valency at low temperatures,at about470℃,V(Ⅲ)iscompletely oxidized to V(Ⅳ);above500℃,the temperature is the most impor-tant factor for the oxidation of V .At higher temperatures no more V is oxidizedto V(Ⅴ);an equilibrium is established after92％of V is oxidized to V(Ⅴ).The roles of NaCl in the recovery of V_2O_5 from the coal ash were discussed.The best conditions for roasting are temperature750-800℃for1 h.underthe oxidation-chlorination atmosphere.When the ore:NaCl=100:10 by weight,η_roast reaches85.5％.According to the results,a flowsheet for V_2O_5 extrac-tion from coal ash has been proposed.
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Valency Study of Vanadium in Stone Coal Ash of Jiangxi Province |
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| Authors: | Xu Guozhen Ge Naie Li Jigui |
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| Institution: | Xu Guozhen Ge Naie Li Jigui
Department of Basic Courses,China University of Geosciences,Beijing 100083 |
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| Abstract: | |
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| Keywords: | coal ash NaCl / oxidation roasting leaching and extraction the soluble vanadate recovery Jiangxi Province |
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