Structure and reactivity of cokes
In the blast furnace, coke reactivity is an important parameter for high temperature mechanical strength. This property is now controlled in most integrated metallurgical coke plants by the CSR method. According to this reference, the influence of coal rank and maceral composition on reactivity was confirmed. The influence of carbon and porous texture on reactivity was also explained as a consequence of coal property and coking conditions. The gasification regime is an important parameter which determines a weight loss gradient in the coke pieces and also the mechanical strength after reaction. These results will be used to define a coke with higher resistance in the blast furnace with high coal injection rate. A solution could be to prepare a coke giving a surface reaction due to gas diffusion limitation, to preserve mechanical strength. Such a coke would have a high reactivity and a developed non-accessible microporosity. Low rank coals could be used to produce this coke.
Bibliographic Reference: EUR 14290 FR (1992) 151 pp., MF, ECU 8, blow-up copy ECU 24
Record Number: 199211235 / Last updated on: 1994-11-29
Original language: fr
Available languages: fr