Theory and practice of coking charge formulation under current conditions

摘要

The current raw material coking basis is characterized by a low level of control, lack of coordination, and incomplete use of the potential for improving coke quality. Under these conditions, proper charge formulation is particularly important for every organization. In the coke production at Nizhnii Tagil' Metallurgical Corporation, prompt correction of charge composition takes account of the availability, daily consumption, and presence of coals in transit, and also the quality of the coals in the stocks and silos by means of a special program. Industrial coking tests confirm the soundness of the criteria devised by the All-Russia Coal Chemistry Research Institute [2] for optimality in charge composition and quality. The composition optimization on the ratio of the sintering and the lean components provides not only improved coke strength parameters but also stabilization of them. The proposed bonding agent-filler model incorporates the specific aspects of the coking at the stages of formation of the gas-saturated foam layer and the semicoke-coke. It is desirable to introduce a characteristic of the bonding agent in addition to the previously proposed quality parameters from the determination of the liquid phase yield by the KhPI method, while for the filler one determines the ballast levels of semiproduct and rock.