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不同进液方式下铜电解槽内电解液流动特性的评价 预览

Evaluation of flow behavior in copper electro-refining cell with different inlet arrangements
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摘要 铜电解槽的进液口布置方式对极板间的流场有着显著的影响,而流场的分布决定电解过程中的电流分布。为了深入了解电解液在竖直极板间复杂的流动行为,以铜电解槽为研究对象,建立了针对“一端进液”、“底部中心进液”、“上侧交错进液”和“底部交错进液”4种不同进液方式下电解槽内电解液的流动过程的三维计算流体动力学模型并进行数值模拟。结果表明:由于“底部中心进液”式电解槽中进液口的位置分布不均匀,其速度的极差较大,是交错进液时的4倍以上。另外,由于“底部交错进液”式电解槽内电解液的湍流强度较大,因此其体平均速度是“一端进液”式的4倍。综合来看,“底部交错进液”式电解槽能够将新鲜的电解液快速、均匀地补充到极板间,为提高电流密度和增加产能奠定了基础。 The arrangement of electrolyte inlet in the copper electro-refining(ER)cell has a great influence on the local flow field,which affects the distribution of electrical current density in consequence.In order to understand the complicated phenomena ofelectrolyte flow behavior in vertical counter electrodes in full-scale copper ER cell,the three-dimensional computational fluiddynamics(CFD)models with four different arrangements of electrolyte inlets,i.e.,single inlet(SI),central bottom inlets(CBI),topside interlaced inlets(TII),and bottom side interlaced inlets(BII),were established to simulate the flow behavior.Simulation resultshave revealed that the parallel injection devices help to improve the electrolyte velocity between electrodes,and while the relativerange of electrolyte velocity in CBI exceeds that of TII and BII,which is more than4times,indicating its severer unequal flowdistribution.Meanwhile,the average velocity of electrolyte in BII is4times larger than that of SI due to its higher turbulenceintensity.Generally,one of the efficient ways to supply fresh copper solution rapidly and uniformly into the inter-electrode space is toadapt the arrangement of BII.By utilizing such an arrangement,the electro-refining under high electrical current density is possible,and the productivity can be increased in sequence.
作者 周萍 马海博 谢紫微 闫红杰 Chenn Q. ZHOU Ping ZHOU;Hai-bo MA;Zi-wei XIE;Hong-jie YAN;Chenn Q.ZHOU;School of Energy Science and Engineering, Central South University;Center for Innovation through Visualization and Simulation,Purdue University Northwest;
出处 《中国有色金属学报:英文版》 SCIE EI CAS CSCD 2017年第10期2282-2290,共9页 Transactions of Nonferrous Metals Society of China
基金 Foundation item: Project (61321003) supported by the National Natural Science Foundation of China
关键词 铜电解精炼 进液口布置方式 流场均匀性 计算流体力学 copper electro-refining electrolyte inlet arrangement flow uniformity computational fluid dynamics
作者简介 Corresponding author: Chenn Q. ZHOU; Tel: +1-219-989-2665; E-mail: czhou@pnw.edu
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