| 摘要 |
PROBLEM TO BE SOLVED: To improve productivity in a method for granulating sintering raw material wherein water is added to a sintering raw material such as powdery iron ore, limestone and powder coke to be mixed together and powder coke is added separately twice in a first half period and in a second half period.SOLUTION: A CEI is not lower than 1.0 and not higher than 3.1 when the CEI is represented by following equation: CEI=ln[(G1+G2/G4+G5)] wherein G1 is an existence ratio of particles of powder coke alone in a granulated product; G2 is an existence ratio of particles in each of which granular iron ore adheres to the surface of a core particle consisting of granular iron ore and powder coke further adheres to the surface; G4 is an existence ratio of particles in each of which powdery iron ore adheres to the surface of a core consisting of aggregated powder coke; and G5 is an existence ratio of particles in each of which powdery iron ore adheres to the surface of a core particle consisting of granular iron ore and powder coke is buried in the powdery iron ore. |
