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酸浸对钙化焙烧提钒工艺钒浸出率的影响

DOI: 10.3969/j.issn.1005-3026.2014.11.013, PP. 1574-1577

Keywords: ,钒渣,酸浸,钙化焙烧,提钒,钒浸出率

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Abstract:

采用稀硫酸浸出法提取钙化焙烧后钒渣中的钒,考察了浸出参数:物料粒度、体系pH值、浸出温度和时间、液固比(L/S)、搅拌速度对钒及杂质元素浸出率的影响.结果表明:物料粒度小于75μm时对提高钒浸出率影响较小;液固比从2∶1增加到7∶1,搅拌速度由100增加到500r/min时,钒浸出率增长幅度均低于3%;钒浸出率在浸出前15min内迅速升高,之后增长变缓;浸出体系pH值对钒及杂质浸出率影响显著,pH值为2~3时钒浸出率达90%,杂质元素Ca,Mn,Mg,Al,Si,P浸出率为10%~30%;在较佳浸出条件下:粒度96~75μm,pH值为25,温度55℃,时间30min,L/S为3,搅拌速度500r/min,钒浸出率超过91%.

References

[1]  [1]廖世明,柏谈论.国外钒冶金[M].北京:冶金工业出版社,1985:4-19.(Liao Shiming,Bai Tanlun.Foreign vanadium metallurgy[M].Beijing:Metallurgical Industry Press,1985:4-19.)
[2]  Moskalyk R R,Alfantazi A M.Processing of vanadium:a review[J].Minerals Engineering,2003,16(9):793-805.
[3]  Polyak D E.U S 2009 minerals yearbookvanadium[M].Reston:Geological Survey,2011:1-10.
[4]  Zhang Y M,Hu Y J,Bao S X.Vanadium emission during roasting of vanadiumbearing stone coal in chloride[J].Minerals Engineering,2012,30:95-98.
[5]  Du J,Wang N,Tao C Y,et al.Microwaveaided roasting for extraction of vanadium from stone coal[J].Chemical Industry and Engineering Progress,2010,29(sup1):494-497.
[6]  Li X S,Xie B,Wang G E.Oxidation process of lowgrade vanadium slag in presence of Na2CO3[J].Transitions Nonferrous Metals Society of China,2011,21(8):1860-1867.
[7]  Chen T J,Zhang Y M,Song S X.Improved extraction of vanadium from a Chinese vanadiumbearing stone coal using a modified roastleaching process[J].Asiapacific Journal of Chemical Engineering,2010,5:778-784.
[8]  Wang F,Zhang Y M,Liu T,et al.Comparison of direct acid leaching process and blank roasting acid leaching process in extracting vanadium from stone coal[J].International Journal of Mineral Processing,2014,128:40-47.
[9]  Liu B,Du H,Wang S N.A novel method to extract vanadium and chromium from vanadium slag using molten NaOHNaNO3 binary system[J].AIChE Journal,2013,59(2):541-552.
[10]  Rakib M,Durand G.Study of complex formation of vanadium(V)with sulphate ions using a solvent extraction method[J].Hydrometallurgy,1996,43(1/2/3):355-366.
[11]  张菊花.改性高钛渣中金红石相的分离研究[D].沈阳:东北大学,2009.(Zhang Juhua.Separation of rutile phase in the modified high titanium slag[D].Shenyang:Northeastern University,2009.)(上接第1573页)3结论1) 澄清室的分散相厚度随着时间的增大而减小,并且澄清室有搅拌比无搅拌能有效缩短分散相厚度到达稳态的时间.2) 澄清室出口的相夹带随时间的增大而减小,并且澄清室有搅拌与澄清室无搅拌时油相出口的水相夹带区别不大,水相出口的油相夹带明显较小.3) 数值模拟得到的速度场与PIV实测得到的速度场保持一致.澄清室有搅拌时比无搅拌时更有效地抑制回流,能加速油、水两相分离.

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