2001 Volume 87 Issue 5 Pages 342-349
Since the beginning of 1998 the high PC injection and low FR operation is realized under high productivity (about 2.2 t/d/m3) and without decrease of Al2O3 in sinter in Muroran No. 2 blast furnace. By sinter quality improvement and burden distribution adjustment by new-type charging chute, inverse v-shape cohesive zone is formed under high O/C (more than 5), and gas flow stabilization and improvement of gas permeability and packing characteristic of dead man are observed. One of main tasks from now on is clarifying phenomena of reaction and assimilation between ash from pulverized coal and dripping slag under cohesive zone and its control.