Melting, evaporation of zinc and oxidation of its vapors is carried out in muffle furnaces of continuous operation.
A muffle furnace is a chamber made of refractory bricks, in which muffles are arranged horizontally.The temperature in the furnace chamber varies between 1100-1450 0C
The zinc loaded into the muffle melts, heats up and evaporates intensively at a temperature of 870 C.
Zinc vapors from the muffle enter the oxidation well, where they are oxidized by air oxygen. In the oxidation wells, with the help of mill fans installed between the furnaces and the filter equipment, the discharge is maintained. The oxidation reaction of zinc vapor proceeds exothermically.