Optimization of stirred reactor in leaching process for extractive hydrometallurgy of vanadium

doi:10.16085/j.issn.1000-6613.2015.05.010

Chemical Industry and Engineering Progree ›› 2015, Vol. 34 ›› Issue (05): 1241-1245,1253.DOI: 10.16085/j.issn.1000-6613.2015.05.010

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Optimization of stirred reactor in leaching process for extractive hydrometallurgy of vanadium

LIU Zuohua^1,2, ZHOU Zhenglin¹, ZHU Jun¹, LIU Renlong¹, TAO Changyuan¹, WANG Yundong², PENG Yi³

1. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;
2. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
3. Panzhihua Iron and Steel Institute Limited Company, Pangang Group Company, Panzhihua 617000, Sichuan, China

Received:2014-09-29 Revised:2014-11-05 Online:2015-05-05 Published:2015-05-05

湿法提钒浸出段搅拌反应器结构的优化

刘作华^1,2, 周政霖¹, 朱俊¹, 刘仁龙¹, 陶长元¹, 王运东², 彭毅³

1. 重庆大学化学化工学院, 重庆 400044;
2. 清华大学化学工程系, 北京 100084;
3. 攀钢集团公司攀枝花钢铁研究院有限公司, 四川攀枝花 617000

通讯作者: 刘作华(1973—),男,博士,教授,主要从事环境资源化工和化工工程强化方面的研究.E-mailliuzuohua@cqu.edu.cn.
作者简介:刘作华(1973—),男,博士,教授,主要从事环境资源化工和化工工程强化方面的研究.E-mailliuzuohua@cqu.edu.cn.
基金资助:
国家重点基础研究发展计划(973计划)(2012CBA01203)、清华大学化学工程联合国家重点实验室开放课题(SKL-ChE-12A02)及重庆市自然科学基金重点项目(CSTC2012JJB0006).

Abstract

Abstract: Leaching stirred reactor is one of the important unit in leaching process. Reactor with reasonable optimization design contributes to leaching time reduction and leaching efficiency improvement. The leaching stirred reactor of Pangang Group Company was optimized by adjusting blade layer spacing,changing impeller installation layers or installing draft tube. The macroscopic flow structure was simulated for original and improved leaching stirred reactor with computational fluid dynamics(CFD) software Fluent. Results showed that the original double-impeller reactor with layer spacing C₂ at 1100mm contributed to small fluid axial velocity and serious “dead zone” phenomenon. The spacing C₂ in the double-impeller layer was adjusted to 1800mm and a three-impeller or draft tube was installed. Compared with the original reactor,the above improvement could contribute to fluid axial flow strengthening,“dead zone” areas reduction,flow structure variation improvement and fluid mixing efficiency enhancement.

Key words: stirred vessel, optimization, computational fluid dynamics, flow, mixing

摘要： 清洁提钒工艺中,熟料的湿法浸出是重要的操作单元.浸出搅拌反应器的合理设计与优化,可缩短浸矿时间以及提高浸矿效率.本文通过改变搅拌桨桨叶间的层间距、搅拌桨的安装层数以及安装导流筒等方法,对攀钢集团公司的浸出搅拌反应器进行优化和改进;并结合计算流体动力学(CFD)Fluent商业软件,分别模拟了原浸出搅拌反应器和改进后浸出搅拌反应器的宏观流场结构.结果表明:在层间距C₂为1100mm的原双层搅拌桨浸出搅拌反应器内,流体轴向速度较小,“死区”现象较严重;与原反应器相比,调整双层搅拌桨桨叶之间的层间距C₂为1800mm以及安装3层搅拌桨或导流筒,都可加强反应器内流体的轴向流动,减小“死区”范围,进而改善流场结构的均匀分布,有助于强化流体混合.

关键词: 搅拌槽, 优化, 计算流体动力学, 流动, 混合

CLC Number:

TQ027.2

LIU Zuohua, ZHOU Zhenglin, ZHU Jun, LIU Renlong, TAO Changyuan, WANG Yundong, PENG Yi. Optimization of stirred reactor in leaching process for extractive hydrometallurgy of vanadium[J]. Chemical Industry and Engineering Progree, 2015, 34(05): 1241-1245,1253.

刘作华, 周政霖, 朱俊, 刘仁龙, 陶长元, 王运东, 彭毅. 湿法提钒浸出段搅拌反应器结构的优化[J]. 化工进展, 2015, 34(05): 1241-1245,1253.

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Optimization of stirred reactor in leaching process for extractive hydrometallurgy of vanadium

湿法提钒浸出段搅拌反应器结构的优化

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