METHOD FOR PREVENTING CORROSION AND ABRASION OF ROTARY DISC

摘要

PURPOSE:To prevent the imbalance of a rotary disc, by a method wherein certain curvature is imparted to the corner where the outer side surface and the outer bottom surface of the rotary disc are met and said surfaces are coated with alumina to prevent the corrosion and the abrasion of said rotary disc. CONSTITUTION:Certain curvature 12 is imparted to the corner where the outer side surface and the outer bottom surface of a rotary surface are met and said surfaces are coated with alumina 13. When an exhaust gas is treated by a semi- dry hydrogen chloride removing apparatus having thus obtained rotary disc, the imbalance of the rotary disc due to the corrosion and the abration is prevented and a good slurry spray state is held for a long time.