Post-reaction strength of coke under various conditions

Transport Properties of CO2 in Different Reactivity Coke Solution Loss Reaction Based on Stefan Flow Theory

“…The degradation of coke strongly dominates the gas permeability of the upper part of the blast furnace and impacts liquid permeability of the lower part of the blast furnace . The main reason for coke degradation is the solution loss reaction of coke, which is the gasification reaction with carbon dioxide (C coke + CO 2 = 2CO). , Furthermore, the degradation of coke results from the increase of the gasification rate, the expansion of pores, and the thinning of pore walls . Therefore, it is of great significance to deeply study the coke gasification mechanism for understanding and controlling the reaction process.…”

“…At present, the coke quality evaluation method developed by Nippon Steel Corporation in the early 1970s, coke reacts with carbon dioxide at 1100 °C for 2 h, is the most widely used method around the world. , It is generally accepted that the coke with a low coke reactivity index% (CRI) and high coke strength after reaction% (CSR) is of high quality. − However, the difference in CRI and CSR of coke used by ironmaking enterprises is very significant in different countries . Even in China, the difference in CRI and CSR of coke used by ironmaking plants in different regions is quite distinct .…”