Method for comprehensively processing noble lead

A method for comprehensively processing a noble lead, comprising:

• (1) subjecting the noble lead to a first vacuum distillation to obtain a volatile matter and a residue, wherein constituent elements of the noble lead comprise lead, antimony, arsenic, bismuth, copper, silver and gold,
• subjecting the volatile matter to two-stage condensation to obtain a lead-bismuth-antimony alloy and elemental arsenic respectively;
• subjecting the lead-bismuth-antimony alloy to oxidation refining to obtain antimony trioxide and a lead-bismuth alloy;
• then electrolyzing the lead-bismuth alloy to obtain refined lead and bismuth anode mud;
• then sequentially subjecting the bismuth anode mud to reduction smelting and vacuum distillation to obtain silver and raw bismuth;
• and finally subjecting the raw bismuth to chlorination refining to obtain refined bismuth and lead chloride;
• (2) subjecting the residue obtained in step (1) to a second vacuum distillation to obtain a silver alloy and a copper alloy;
• subjecting the silver alloy to oxidation refining to obtain antimony trioxide and dore silver;
• and then subjecting the dore silver to electrorefining to obtain electrolytic silver and silver anode mud;
• and
• (3) subjecting the copper alloy to oxidation refining to obtain antimony trioxide and blister copper, then subjecting the blister copper to electrorefining to obtain electrolytic copper and copper anode mud;
• then subjecting the copper anode mud to acid leaching to obtain a copper salt and a gold-rich silver slag;
• finally subjecting the gold-rich silver slag to electrorefining to obtain electrolytic silver and silver anode mud;
• and returning the copper salt to the electrorefining;
• wherein in step (1) a mass content of the constituent elements of the noble lead is:
• 20-40% of Pb, 10-20% of Sb, 15%-40% of As, 5-10% of Bi, 5-10% of Cu, 10-15% of Ag, and 5-1500 g/t of Au;
• wherein for the first vacuum distillation of step (1), a temperature is 750-950° C., a time is 3-5 hours, and a pressure is 1-100 Pa;
• wherein for the chlorination refining in step (1), a temperature is 350-500° C., and a time is 5-6 hours;
• and during the chlorination refining, a pressure of the chlorine is 0.31-0.5 kPa;
• wherein for the second vacuum distillation of step (2), a temperature is 1,100-1,500° C., a time is 2-4 hours, and a pressure is 1-100 Pa.