栅栏型铝基铅合金阳极板优化应用

Optimization of fence-type aluminum-based lead alloy anode plate

针对传统轧制阳极板存在使用寿命短、成本高以及强度低等问题,研究了一种栅栏型铝基Pb-0.3%Ag-0.12%(Ca+Sr)复合阳极板,降低了阳极板成本,并提高了阳极板强度和耐腐蚀性。为实现该新型复合阳极板的工业化应用,进一步对其进行优化,通过扩大试验对传统阳极板和不同扁线宽度的栅栏型镀膜阳极板进行15 d电解生产指标及阳极泥清理等对比,并对不同棒间距的栅栏型镀膜阳极板的阴极锌产品进行了对比,得出以下结论:相较于传统阳极板,栅栏型镀膜复合阳极板对电流效率、槽电压以及阴极锌品质有较大的改善;窄条阳极板比宽条阳极板拥有更大的有效活性面积,但在后期进行清理阳极泥时,窄条阳极板更难清理,且易产生弯曲;栅栏型镀膜复合阳极板的棒间距过宽会导致阴极锌出现“井”字痕迹,影响产量及电流效率,合适的棒间距为9~14 mm。

The traditional rolled anode plate has the problems of short service life, high cost, low intensity, etc., the new fence type aluminum based composite anode plate of Pb-0.3% Ag-0.12%(Ca+Sr) is developed, which has reduced the anode plate cost and improved the strength and corrosion resistance of anode plate. To realize the industrial application of this new type of composite anode plate, further optimization is made for it. By means of pilot test, by comparison of 15 d electrolysis production indicators, anode slime etc. between traditional anode plate and fence type coated anode plate of different flat wire widths, and comparison of the cathode zinc products of the fence type coated anode plate of different bar clearances, the following conclusions are obtained: compared with the traditional anode plate, the narrow strip fence type coated composite anode plate can make large improvement in electric current efficiency, cell voltage and cathode zinc quality;the narrow strip anode plate has larger effective active area than that of wide strip, however, in the later stage cleaning of anode slime, it is more difficult to clean narrow strip anode plate, which is prone to bending;the too large bar clearance of fence type coated composite anode plate will result in the appearance of “#” traces on the cathode zinc, affecting the output and electric efficiency, the proper bar clearance is 9~14 mm.