| 摘要 |
PROBLEM TO BE SOLVED: To reduce and control the expansion pressure of a blended coke steadily and surely under the limited allowable value for avoiding a damage of a coke furnace and to prepare a coke having a strength of a certain value or more by using a simple method to reduce the expansion pressure instead of increasing a blending ratio of a brand of coke having a low expansion pressure when the expansion pressure of a conventional blended coke is estimated from the arithmetical mean of expansion pressure of each brand of cokes constituting the blended coke. SOLUTION: In this method of operating a coke furnace using a blended coke of two or more brands of cokes, a specific equation is deducted from the arithmetical mean of expansion pressure of each brand of cokes constituting the blended coke, the blending ratio of non-slightly-caking coke, the whole expansion coefficient of a blended coke of caking cokes only, and the addition ratio of a caking additive. The expansion pressure of the blended coke is calculated from this equation. Brands of cokes to be blended, the blending ratio and the addition ratio of a caking additive are adjusted to keep this calculated expansion pressure of the blended coke under a predetermined limited allowable value of the coke furnace.
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