In the processing of lead is formed of silver foam (SP), which requires complex processing, with commercial production of single products. One of the possible ways of SP recovery is vacuum distillation, which is considered one of the most effective and environmentally friendly methods for the separation and purification, processing and refining of various metals. The aim of this work is to determine quantitative and qualitative composition of the products of vacuum distillation are different in composition of polymetallic alloys Zn-Pb-Ag depending on the temperature, pressure and gas environment and in assessing the possible use of calculated equilibrium phase diagrams “gas-liquid” VLE (vapor liquid equilibrium) for predicting technological parameters of the refining joint ventures. It is established that the zinc in the source content in the alloy is 0.4 to 16.7 wt.% speeds of more than 95% within 3 hours at a temperature of 1473 K and a pressure of 1 · 105 Pa. When sublimation of the zinc in the air and the contact of the condensate with water vapor at elevated temperatures oxidizes ~14% of the metal that recommends carrying out the process in inert gas argon. At a temperature of 1323 K and the duration of the distillation 14 hours reducing the pressure in the system from 133 to 7 Pa increases the content of silver 0.046-of 3.48% in the condensate of lead up 98.61-95.94%. At step heating to 1373 K and P = 13 Pa with an exposure of 0.4 hour at 873 K and 1173 K, and the duration of the sublimation 1 hour lead content of the distillation residue amounted to 3.61%, and silver in the sublimates of lead - 0.046%. Deficiencies identified during use of dust products - mechanical ablation or under vacuum, or in the case of allocating a large volume of vapor of volatile components when heated.