Blast furnace smelting technology using sinter of varying basicity in the charge

Abstract

The chemical composition of a highly basic sinter was calculated using a feedstock with a high proportion of iron-bearing waste materials. Calculations confirm that the use of high-basicity sinter (1.2–4.0 units per ton) can drastically cut limestone consumption. Specifically, charging 350 kg per ton of hot metal into a furnace operating on low-basicity pellets (0.32–0.36 units) provides the required flux balance. This consequently reduces the specific coke rate and increases blast furnace productivity.