Melting, evaporation of zinc and oxidation of its vapors are carried out in continuous muffle furnaces.
A muffle furnace is a chamber made of refractory bricks, in which muffles are located horizontally. The temperature in the furnace chamber varies within the range of 1100-1450 ° C.
Zinc loaded into the muffle melts, heats up and intensively evaporates at a temperature of 870 C.
Zinc vapors from the muffle enter the oxidation well, where they are oxidized with atmospheric oxygen.
Depressurization is maintained in the oxidation wells with the help of mill fans installed between the furnaces and filter equipment. The oxidation reaction of zinc vapor is exothermic.