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Selective leaching of vanadium from V-Ti magnetite concentrates by pellet calcification roasting-H_(2)SO_(4) leaching process

查看全文 作　　者：Yi [1,2,3]Luo;Xiaokui [1,2,3]Che;Xinglan [1,2,3]Cui;Qi [1,2,3]Zheng;Lei [1,2,3]Wang 高影响力作者 机构地区：[1]National Engineering Laboratory of Biohydrometallurgy,GRINM Group Corp.,Ltd.,Beijing 101407,China;[2]GRINM Resources and Environment Tech.Co.,Ltd.,Beijing 101407,China;[3]General Research Institute for Nonferrous Metals,Beijing 100088,China高影响力机构 出　　处：《International Journal of Mining Science and Technology》索引2021年第31卷第3期,共7页高影响力期刊 基　　金：funded by the National Science Foundation of China(No.51704028);the Key R&D Program of Yunnan Province(No.2018IB027)。 摘　　要：A novel method of pellet calcification roasting-H_(2)SO_(4) leaching was proposed to efficiently separate and extract vanadium(V)from vanadium-titanium(V-Ti)magnetite concentrates.The leaching rate of V is as high as 88.98%,while the leaching rate of impurity iron is only 1.79%.Moreover,the leached pellets can be used as raw materials for blast furnace ironmaking after secondary roasting.X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy with energy dispersive X-ray spectrometry(SEMEDS)analyses showed that V^(3+)was oxidized to V^(5+)after roasting at 1200℃,and V^(5+)was then leached by H_(2)SO_(4).X-ray diffraction(XRD)analyses and single factor experiment revealed a minimal amount of dissolved Fe_(2)O_(3) during H_(2)SO_(4) leaching.Therefore,a high separation degree of V and iron(Fe)from V-Ti magnetite concentrate was achieved through H_(2)SO_(4) leaching.Compared with the traditional roastingleaching process,this process can achieve a high selectivity of V and Fe,and has excellent prospects for industrial production. 关 键 词：Selective leaching VANADIUM V-Ti magnetite concentrate PELLETS Sulfuric acid
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