Durable Structures for the Lining of Electric-Arc Furnaces Used to Make Ferronickel and Granular Mattes

Resumo

Results are presented from a study of the service conditions of the lining of electric-arc furnaces and the character of fracture of their lining. New compositions of refractory mortars and mixes were developed along with new lining systems. Extensive factory tests were conducted of new systems that employ high-quality refractory mortars and protective refractory mixes in the lining of the furnace roof. Implementation of the measures that were proposed have made it possible to increase the durability of the lining by a factor in the range 1.4 – 1.6.