FIELD: metal refining, in particular, apparatuses for refining of nonferrous metals and designed for separation of bismuth from tin-bismuth alloys into separate product. SUBSTANCE: apparatus has cylindrical vacuum chamber accommodating on bottom a column of evaporating circular plates encircled by cylindrical perforated shield, graphite heater installed on longitudinal axis and mounted on chamber upper cover, barometric tubes for discharge of products from chamber. Evaporating plates are made with peripheral or central ports and tightly installed alternately into column. Holes for alloy drain are made on the middle line of plate circle. Upper plate has additional side ports for vapor outlet. EFFECT: higher efficiency. 3 dwg
