抄録
The effect of petroleum coke addition to coal charge on the resultant coke qualities was investigated using a coke test oven. Addition of the petroleum cokes into coal charge, in the range from 1 to 5 mass%, deteriorated coke qualities, especially coke strength evaluated by the drum index regulated in K2151 in JIS, DI^<150>_<15>, and the coke strength after the reaction with carbon dioxide, CSR. However, further crushing of the petroleum cokes was found to lead to suppression of the drop in DI^<150>_<15> and CSR. On the other hand, the petroleum coke addition had benefit to increase the coke yield due to the low volatile matter content of the petroleum cokes. The sulfur content of the petroleum cokes was found to remain mainly in the resultant cokes after carbonization. Therefore, the increase in sulfur content of the resultant cokes must be taken into consideration when the coke is used in a blast furnace.
