Vanadium Transitions during Roasting-Leaching Process of Vanadium Extraction from Stone Coal
作者： Yunliang Zhao , Licai Chen , Hao Yi , Yimin Zhang , Shaoxian Song
DOI: 10.3390/MIN8020063
关键词:
摘要: The vanadium occurrence in stone coal, water leaching, and acid leaching residue was investigated by energy dispersive spectrometer (EDS) mapping point analysis, the transitions during roasting-leaching of coal were revealed. In roasting process, vanadium-bearing muscovite is converted to K-Na-feldspar, accompanying liberation vanadium. Most liberated reacts with sodium salt generate water-soluble vanadate, some calcite form water-insoluble calcium other exists as free oxide. However, for coarse grains, reaction K-Na-feldspar only occurs at outer margin interior grains not liberated. During vanadate leached out. oxide are dissolved out process vanadium, presenting surrounded still remains residue. Two suggestions, including optimization grinding-classification adopting microwave roasting, proposed improving recovery according transition rules.
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