FIELD: metallurgy.
SUBSTANCE: vacuum apparatus comprises a cylindrical vacuum chamber with an installed column of annular evaporation trays with an upper feeder plate and a lower discharge tray, a metal conduit fed to the upper feeder plate and connected to a barometric tube immersed in the source alloy boiler, the lower drain plate being connected to A barometric tube immersed in a boiler for removing pure tin from the chamber, a graphite heater positioned along the axis of the column of trays and mounted on the upper cover of the vacuum tube Amers, cylindrical graphite perforated screens for condensation of vapours surrounding the column of trays along the periphery, and a barometric tube placed under said vacuum chamber and immersed in a condensate discharge vessel and provided with a condenser, installed between the wall of mentioned vacuum chamber and a graphite perforated screen coaxial with it, made in the form of a grid and covered with an annular bowl with a bottom of the mesh, and at least one fitting for pouring the circulating condensate inserted into the annular bowl. The condenser is made in the form of a stack of coaxially mounted cylinders made of stainless steel mesh, or a mesh folded into a spiral, or suspended cylinders of graphite fabric. The condensate boiler is connected to a pump for pumping condensate through the connection into the annular bowl from the grid above the condenser, cylindrical graphite perforated screens are mounted on a graphite bottom with an annular channel for collecting the separated industrial product connected to the insertion pipe to separate it into a separate barometric pipe for industrial products, in a cauldron of industrial products.
EFFECT: increasing the degree of separation of impurities from tin and reducing the circulation of circulating semi-products and thereby increasing the productivity of the apparatus.
6 cl, 1 dwg
