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粗铅电解精炼一直沿用以胶为主的复合添加剂,其缺点是:槽电压较高,As、Sb、Bi等杂质易析出,要制得1~#铅或优质铅必须在电铅锅中除杂.在相同电解条件下,改用新添加剂配方后,槽电压降低杂质的溶解电位和析出电位改变,As、Sb、Bi等杂质较难溶解和析出,析出铅中杂质含量很低;与此同时,阳极铅均匀溶解,阴极均匀沉积,电流效率高(97%～98.5%),析出铅光洁平整,阳极泥附着相应减少.因此,工业试验及工业试生产(年产1万t电铅)产出的析出铅符合优质铅(Pb≥99.997%)或1~#铅(Pb≥99.994%)标准,省去了除As、Sb工序.析出铅中As、Sb含量(与以胶为主的添加剂比较)降低一个数量级(As由0.004%降到0.00025%;
Lead electrolysis refining has been used to glue the main composite additives, the disadvantage is: higher tank voltage, As, Sb, Bi and other impurities easily precipitated, to make 1 ~ # lead or lead must be good in the lead pot In the same electrolysis conditions, the use of new additive formula, the tank voltage decreases the dissolution potential and precipitation potential changes, As, Sb, Bi and other impurities more difficult to dissolve and precipitation, the precipitation of lead impurities is low; with this At the same time, the anode lead dissolves uniformly and the cathode is uniformly deposited, the current efficiency is high (97% -98.5%), the deposited lead is clean and smooth, and the anode mud adheres accordingly, therefore, industrial tests and industrial trial production The output of precipitated lead meets the standards of high quality lead (Pb≥99.997%) or 1 ~ # lead (Pb≥99.994%), eliminating the steps of removing As and Sb. The content of As and Sb precipitated lead Additive comparison) by one order of magnitude (As reduced from 0.004% to 0.00025%;