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| Study on the New Clean Technology of Vanadium Extraction from Stone Coal |
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| DOI：doi：10.3969/j.issn.1007-7545.年份.期号.顺序号 |
| KeyWord:Stone Coal;CaO-roasting;Ammonium salt leaching;Absorption; |
| DAI Wen-can,SUN Shui-yu |
| Department of Environmental Engineering/a>;Guangdong University of Technology/a>;Guangzhou 510006/a>;China |
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| Abstract: |
| CaO and some additives was added to the stone coal when it was roasted and then the calcine was leached in NH4HCO3 and NaHCO3 solution.The V2O5 which purity is above 99% was got from the ion-exchange absorb process of the leached solution.Compared with conventional roasting-sodium oxidization method,this method solved the pollution of the waste gas and wastewater.the wastewater discharged from the absorb process can be directly reused into the leaching process without any effect on the leaching rate and qua... |
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