FAULT-FREE DESIGNING OF THE IMPROVED RESISTANCE LININGS FOR THE LARGE-DIAMETER WAELZ KILNS

Abstract

The reasons of the  large skull building up are  investigated in the  article. A number of the  high-temperature magnesia refractories   were  studied,  least   saturated   with    the smelting components, which  had  the  highest service temperature and  the  best abrasion-resistance. It was established that the  fused periclase-chromite refractories high in Сr₂O₃ (PKhPP) had the strongest resistance against the  smelting components. The  range of the  application  of the  PKhPP  refractories was  chosen and  the  combination of the  PKhPP  and  PKhS refractory sections were defined. The heat conductivity of the  PKhPP and  PKhS refractories was  investigated. The  tests  showed the   absence of  the build-ups in the  reaction zone,  also they  showed the  lining resistance increasing by a factor of 1,6‒1,8 at  the  Waelz kilns  of the  Ust-Kamenogorsk Zinc-Lead Works  and  of the Leninogorsk Poly-metallic Works.  Ill. 3. Ref. 4. Tab. 2.