EXTENDING THE LIFE OF INMETCOS SUBMERGED-ARC FURNACE LINING

Recently, lining life of the INMETCO submerged are furnace has been dr amatically extended from an average of eleven months in the 1980s to a current record of 34 months. This paper summarizes test work and oper ating results describing the development and establishment of slag par ameters that reduce corrosion of the magnesite-chrome refractory linin g. The desired slag parameters are now maintained by utilizing waste s treams as slag additives. This paper also discusses the successful eva luation of a rebonded-fused-grain magnesite-chrome refractory as a low er cost, more thermo-mechanically forgiving alternative to a fused-cas t magnesite-chrome refractory that had been the refractory of choice i ii previous years al INMETCO.