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中南大学学报(自然科学版)

Journal of Central South University

第42卷    第4期    总第200期    2011年4月

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文章编号:1672-7207(2011)04-0871-05
锌电积用“反三明治”结构铅基复合多孔阳极
蒋良兴,吕晓军,李渊,彭红建,赖延清,李劼,刘业翔

(中南大学 冶金科学与工程学院,湖南 长沙,410083)

摘 要: 为了改进锌电积用铅基多孔阳极的导电率及机械性能,采用反重力渗流技术制备了一种“反三明治”结构复合多孔阳极,并对其结构进行优化。研究结果表明:在优化的铸造条件下,中间加强金属板与外层泡沫结合为一个整体;外层泡沫的孔径和厚度对阳极电位有影响,在孔径为1.25~1.43 mm,厚度为3 mm时,阳极电位达到最优值;外层泡沫的孔径和厚度对抗拉强度的影响基本可以忽略,但中间加强金属板的厚度对其影响很大;当中间加强金属板的厚度2 mm为时,复合多孔阳极的抗拉强度达9.3 MPa,是多孔阳极的抗拉强度3倍;优化结构后,复合多孔阳极的导电率为多孔阳极的1.3倍。

 

关键字: “反三明治”结构;复合多孔阳极;电导率;极限抗拉强度;阳极电位;锌电积

Anti-sandwich structure lead-based composite porous anode
for zinc electrowinning
JIANG Liang-xing, LÜ Xiao-jun, LI Yuan, PENG Hong-jian, LAI Yan-qing, LI Jie, LIU Ye-xiang

School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

Abstract:In order to improve the electric conductivity and mechanical performance of lead-based porous anode (PA) for zinc electrowinning, an anti-sandwich structure composite porous anode (CPA) was prepared by counter-gravity infiltration and its structure was optimized. The results show that under the optimized infiltration conditions, the core metal and foam outside can integrate together. The pore diameter and thickness of foam have influence on the anodic potential, and the optimum values of them are 1.25-1.43 mm and 3 mm, respectively. The pore size and thickness of foam outside have negligible effect on tensile strength, but the thickness of core metal has great effect on it. The thickness of core metal is 2 mm, the tensile strength of composite porous anode is about 9.3 MPa, which is about 3 times of that of PA. And the electric conductivity of composite porous anode is 1.3 times of that of PA.

 

Key words: anti-sandwich structure; composite porous anode; electric conductivity; ultimate tensile strength; anodic potential; zinc electrowinning

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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