| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a coke charging method using a swinging chute in a bell-less blast furnace capable of intensively strengthening a central gas flow at the time of operating the blast furnace by minimizing a layer thickness ratio of an ore layer and a coke layer in a furnace center region of the blast furnace especially near a deadman by a minimum coke charge. <P>SOLUTION: The coke charging method in forming ore layers and coke layers alternately in a furnace by charging ore and coke into a blast furnace by using a swinging chute is characterized by: firstly forming a first coke layer so as to cover an ore layer by charging coke into a region of a furnace wall side in a ring shape; forming a second coke layer, subsequently, on the first coke layer so as to cover the middle region of the furnace wall side region and a furnace center region by spirally charging the coke into the middle region between the furnace wall side region and the furnace center region; and forming a third coke layer, furthermore, on the second coke layer so as to cover the furnace center region by charging the coke into the furnace center region. <P>COPYRIGHT: (C)2012,JPO&INPIT |
