Process for reducing lead content of lead anode slime

According to the technology for reducing the lead content of the lead anode slime, the lead anode slime is subjected to the technology of primary filter pressing, slurrying and secondary filter pressing, the lead content of the lead anode slime can be reduced to 10% or below, the filtered lead-containing filtrate returns to an electrolyte system, the direct recovery rate of lead is effectively increased, and the production cost is reduced. And meanwhile, the silicofluoride acid returns to an electrolyte system along with the lead-containing filtrate, so that the unit consumption of the silicofluoride acid is reduced, and the treated lead anode slime does not generate spontaneous combustion and smoking phenomena. 本发明开发了一种降低铅阳极泥含铅量的工艺，通过将铅阳极泥通过一次压滤-浆化-二次压滤的工艺，可将铅阳极泥中含铅量降低至10％以下，滤出的含铅滤液再回到电解液系统，有效提高了铅直收率，并有利于铅阳极泥在后续回收其余贵金属，同时硅氟酸随同含铅滤液再回到电解液系统，降低了硅氟酸单耗，而且处理后的铅阳极泥不会产生自燃冒烟的现象。