| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for evaluating adhesive strength at the interface between different kinds of coal by directly observing and measuring defective structure such as minute voids existing at the interface between different kinds of coal, in order to estimate strength of coke produced from blended coal as the raw material using indexes different from that in the past; thereby it becomes possible to enhance coke strength without increasing raw material cost of the blended coal.SOLUTION: This evaluation method of adhesive strength at the interface between different kinds of coal generated due to softening and melting of coal at the time of dry distillation of coal comprises: measuring void proportion existing on the interface between different kinds of coal, and making the rate of existence of adhered part on the interface as adhesive strength index. It is preferable that two kinds of coal are adjusted into predetermined grain size, molding one coal to prepare a molded item, bringing the coal molded item into contact with another coal and integrally molding with the coal molded item, dry distilling the molded item under inert gas atmosphere and coking, and the coked matter is used as a target to be measured of interface in a cross-section including interface between different kinds of coal. |
