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.%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2mm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.
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