Investigating the role of barium sulfate on the structure of the casting anode in the electrorefining plant and its effect on the dissolution rate of the anode

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub Date : 2025-02-07 DOI:10.1016/j.matchar.2025.114822

Fatemeh Rostamzadeh , Gholam Reza Khayati , Sobhan Mahmoodi , Nahid Assadat Yaghubi , Saman Nemat

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Abstract

Cast copper anodes play a key role in the electrorefining plant due to their physical/chemical properties. Considering the corrosion current density as a measure of the refinery dissolution rate, this study systematically investigates the effects of barium sulfate thickness (680–900 μm) of the mould on the metallographic characteristics of copper casting anode and its dissolution behaviors. 3 anodes with different thicknesses of barium sulfate were cast as a variable approach in the casting wheel of the melting unit of Shahrbabek copper complex. Metallographic analysis, copper-based quantometer and potentiostat technique were used to characterize the samples. Varying the thickness of barium sulfate in the original mould has been able to create a wide range of grain size and morphology in the anode structure. Based on the results, the grain boundary parameter has the greatest effect on the corrosion current density. The grain boundary value of 20 % was determined as the critical limit, which led to an increase in the corrosion current density in the range of less than 20 % of the grain boundary.

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研究了硫酸钡对电精炼厂铸阳极组织的影响及其对阳极溶解速率的影响

铸铜阳极由于其物理/化学性质在电精炼装置中起着关键作用。本研究以腐蚀电流密度作为表征精炼厂溶解速率的指标，系统研究了硫酸钡厚度（680 ~ 900 μm）对铸铜阳极金相特征及其溶解行为的影响。在Shahrbabek铜络合物熔炼单元的铸造轮上，采用可变方法铸造了3个不同厚度的硫酸钡阳极。采用金相分析、铜基定量仪和恒电位器技术对样品进行了表征。在原来的模具中改变硫酸钡的厚度已经能够在阳极结构中产生广泛的晶粒尺寸和形态。结果表明，晶界参数对腐蚀电流密度的影响最大。将晶界值的20%确定为临界极限，在晶界的20%以内，腐蚀电流密度增大。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.