FURNACE FOR PREPARATION OF ZINC OXIDE Russian patent published in 1998 - IPC

FIELD: production of zinc oxide (zinc white) from zinc-containing raw material. SUBSTANCE: furnace includes loading device, evaporating and oxidizing cyclone chambers separated by partition, slag disposal unit with hole and slag disposal chamber located under it. Slag disposal chamber is provided with guide for motion of slag which is made in form of truncated cone turned over with its smaller base downward and provided with central hole brought in line with hole of slag disposal unit. Generatrix of truncated cone forms inner wall of toroidal prechamber. Cyclone prechamber is located coaxially relative to hole of slag disposal unit and is provided with tangential inlet for gas-and-air medium. Tangential inlet is located above smaller base of above-mentioned guide. Outer wall of prechamber is formed by cylindrical section of slag disposal chamber whose lower portion has form of truncated cone widening downward. EFFECT: enhanced efficiency. 3 cl, 1 dwg