Name : [in Japanese]
Location : [in Japanese]
Date : October 30, 2025 - October 31, 2025
Pages 16-17
In our coke ovens, a high blending ratio of low-volatile matter coal has led to a sharp increase pushing clogging. To mitigate this problem, coal blend optimization was examined with the aim of reducing pushing energy in the initial cycles. Laboratory tests demonstrated that (i) avoiding coals exhibiting high coking pressure at high temperatures secures clearance by allowing primary contraction, and (ii) increasing Total Inertinite promotes the formation of microcracks and suppresses large cracks. Consequently, the optimized blend showed improved contraction ratio and reduced coking pressure. Application in the plant resulted in approximately 7.5% reduction in pushing energy and a significant decrease pushing clogging.
