VACUUM APPARATUS FOR REFINING TIN ALLOYS Russian patent published in 1997 - IPC

FIELD: nonferrous metallurgy. SUBSTANCE: in vacuum apparatus for distillation refinement of metals enclosing cylindrical chamber, inside which evaporation plates' column is installed surrounded with multilayer perforated screen, graphite heater is axially installed on upper cover plate of vacuum chamber along with barometric tubes for withdrawing products from the chamber. In lower part of casing, flanges are disposed to which barometric tubes are connected. Into the latter, graphite funnels are inserted connected with channels in graphite bottom having pockets to secure above-mentioned screens. EFFECT: improved structure of apparatus. 1 dwg