The invention relates to a method for electrolyzing high-content low-grade lead
bullion. The method comprises the following steps of melting the high-content low-grade lead
bullion containing
copper,
antimony and
bismuth into a pot to be stirred for removing the
copper, thoroughly removing the
copper-containing floating
slag, adding alkali to remove
arsenic and
tin, pumping the lead liquid into an
anode plate
casting machine to be cast into an
anode plate, reasonably matching the use amount of the combined additives to electrolyze the
anode plate and the
electrolyte according to the chemical components of the anode plate and the chemical components of the
electrolyte, extracting
cathode lead, washing the
cathode lead with water to remove the
electrolyte on the surface of the lead and thus obtaining the precipitated lead,
casting the refined precipitated lead to obtain lead pig with the quality reaching the No.1
national standard, gathering the
antimony,
bismuth, copper, gold and silver onto the anode plate to form anode paste, and further comprehensively recovering the
antimony,
bismuth, copper, gold and silver in balance. By adopting the method, the lead
bullion with high contents of copper, antimony and bismuth can be electrolyzed into the qualified precipitated lead in one step, so that the secondary
electrolysis cost can be reduced, and the enriched
metal grade in the anode paste can be improved.