X-ray diffraction (XRD) and transmission electron microscopy (TEM)
techniques have been adopted in this study, to investigate the structure of
carbonaceous materials such as graphite, brown coal char as well as coke,
in order to explain their dissolution performance during ironmaking.
These materials have been selected for study since they are commonly
used recarburizers in the metallurgical industry. It was concluded that the
crystal structure in a carbonaceous material can have a significant
influence on its dissolution into iron melts. The material with the highest
degree of ordering, which is graphite, showed the best dissolution
performance. In contrast, the material with the lowest degree of ordering,
which is brown coal char, showed the worst dissolution performance.