| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing coke, in which a coal blend, that contains poor-quality coal at the least and is used for molded coal, is pulverized, a binder is added to the pulverized coal blend, the binder-added coal blend is kneaded, the kneaded coal is molded in a molding machine to obtain molded coal, the molded coal is charged into a coke oven together with the powdered coal prepared by pulverizing another coal blend for coal powder and the charged coal is dry-distilled and in which the coke having high strength can be produced stably even when the amount of the poor-quality coal to be blended in the molded coal is increased.SOLUTION: The weighted average of the total expansion coefficient, which is obtained by calculating a weighted average of the total expansion coefficient of the coal to be blended in the coal blend for molded coal, is defined as &Sgr;TD and a ratio of coal particles, which are obtained by pulverizing the coal blend for molded coal and each of which has 3 mm or smaller particle diameter, is defined as RD. When &Sgr;TD is lower than 40%, the coal blend for molded coal is pulverized to produce the molded coal so that RD becomes 75-95 mass% and when &Sgr;TD is 40-60%, the coal blend for molded coal is pulverized to produce the molded coal so that RD becomes 95 mass% or lower. |
