RELATIONSHIP BETWEEN CARBON STRUCTURE AND REACTIVITY OF BLAST FURNACE COKE

摘要

The reactivity of blast furnace coke represents the chemical activity of the coke in a carbon dioxide atmosphere at high temperature, where the reaction between the coke carbon and the gaseous reagent is described by the overall reaction C + CO_2 -- > 2CO. (1) Reactivity is calculated according to GOST standard 10089-89 for comminuted coke or GOST 50921 -96 for lump coke and expressed in terms of kinetics (Km, cm~3g~(-1)-s~(-1)) or internal diffusion (CM, percent) [1,2]. Values of Km are calculated from the CO:CO_2 ratio of the escaping gases, while the CM is calculated from the weight loss. The reactivity index CM is closely related to the coke strength after reaction CSR [1-5].