Blast Furnace Operation with Small Size Sinter by the Control of Particle Size Radius Distribution

Abstract

Use of small size sinter ore was investigated by the control of particle size distribution. Ore was divided in O I and O II, and particle size distribution was controled by each movable armor position.
Pressure drop and temperature distribution in the furnace was evaluated by the mathematical model. Control of particle size distribution enables to keep good permeability as same as that of large size sinter by the calculation.
At Kakogawa works, sinter plant screen and blast furnace ore bin screen was decreased from 5.0 mm to 3.0 mm. Movable armor was used in order to control particle size distribution and Blast furnace operation was kept stable.