Abstract
Coke supply for ironmaking will sharply decrease in the beginning of the 21st century in Japan, because of the end of service life of coke ovens. For the purpose of extending the life of the oven, deformation of the coke cake and the load on the side wall during pushing were studied by applying an electric furnace equipped with a movable wall. Cake deformation under compressive force was found to proceed in three stages. The coke cake was reduced in length in the pushing direction in the cake deformation stage, and load was generated on the side walls in the high wall load stage. The secondary crack in the cake prevents the load transmission on the wall. The load transmission rate when the pushing stress was 0.19MPa, βp, was controlled by adjusting the maximum fluidity and mean reflectance of the blended coal.
