1990 Volume 76 Issue 10 Pages 1642-1649
The authors already reported that CaO segregation in raw materials by the separated granulation method improved reduction degradation without worsening reducibility of iron are sinter. This report presents the sintering method mixing two types of pseudo-particles : one contained high CaO content with limestone, scale and Australian iron ores, the other contained low CaO content with return fine, coke breeze and iron ores. "The segregated granulation method" improved the Reduction Degradation of Sinter (RDI) and the permeability of sinter bed in sintering pot test, DL test machine experiment and commercial plant test. The permeability improvement depends on the classification of ore brands. The RDI improvement depends on decrease in the volume of secondary hematite and the co-existence area of secondary hematite and calcium ferrite. "The separated granulation method" is applied to Kashima No. 2 Sinter Plant and contributed to improve the sintering of iron are fines.
