Method for separating copper from lead through vacuum distillation of copper scum

The invention provides a method for separating copper from lead through vacuum distillation of copper scum. The method comprises the following steps of: holding the copper scum in a vacuum environment; performing distillation separation under the conditions of pressure intensity of 5-200 Pa and temperature of 900-1,300 DEG C for 30-180 minutes; getting Pb and PbS in the copper scum in a gas phase under distillation and condensing to obtain lead bullion; and remaining Cu2S and Cu in the copper scum in distillation residue copper matte, thereby realizing separation of copper and lead in the copper scum. The method has the advantages of less types and number of added auxiliary materials, simple process, short flow, complete separation of copper and lead, low energy consumption, low environmental pollution and capabilities of flexibly adjusting production scale and easily realizing industrial production.