3. Conclusion

3.1 Influence of the nature of coals and their preparation and coking conditions

The degree of evolution (rank) of the coals used in the coking mixture is a determining factor in the structural properties of the coke. Not all coals have the properties required to produce metallurgical-grade coke.

Coking coals yield the best cokes: the most organized, the least reactive to CO ₂ and the most mechanically resistant.

Low-grade coals, rich in volatile matter, lead to poorly organized, highly reactive and cracked cokes (low resistance to splitting). These coals are generally less expensive, and the rate at which they are incorporated into the mix needs to be optimized according to the mix preparation...