基于多物理场耦合的铜电解槽阳极腐蚀均匀性研究

Improvement of Anode Corrosion Uniformity of Copper Electrolysis Cell Based on Multi-physical Field Coupling Theory

基于多物理场耦合理论,以铜电解槽阳电极板为研究对象,考虑应力应变与局部腐蚀反应的协同作用,研究阳极板底部圆角半径对阳极电流密度和腐蚀厚度均匀性的影响。结果表明,当阳极底部圆角半径从2 mm增大到12 mm后,阳极板上的电流密度突变率下降6.18%;阳极腐蚀厚度均匀性提高43.44%。当圆角半径为8 mm时,电流效率最高,达到99.18%。通过对电极板结构的优化,有效提高阳极腐蚀厚度均匀性和电流效率,为进一步优化电解槽结构、减小能耗以及提高电极腐蚀厚度均匀性的研究提供理论指导。

For improving the copper anode corrosion uniformity and the current efficiency of the copper electrolytic refining process,herewith,based on the multi-physical field coupling theory,the corrosion behavior of the copper positive plate of the copper electrolytic refining cell was studied in terms of the effect of the synergy of the stress and strain,and local corrosion reaction,as well as the bottom radius of the anode plate on the positive electrode corrosion current density distribution and the thinning uniformity of the anode plate.The results show that when the bottom fillet radius of the anode increases from 2 mm to 12 mm,the current density mutation rate on the anode plate decreases by 6.18%.The uniformity of anode thinning rate was improved by 43.44%.When the fillet radius is 8 mm,the current efficiency is the highest,reaching 99.18%.By optimizing the geometrical shape of electrode plate,the uniformity of thinning rate and current efficiency of the anode plate are effectively improved,which provides a theoretical guidance for further optimizing the structure of electrolytic cell for reducing energy consumption,as well as improving the thinning uniformity of electrode plate.