THE INERTINITE INFLUENCE ON COAL PLASTICITY AND ON THEIR BEHAVIOUR DURING CARBONIZATION
The aim of the paper is to elucidate the aspects concerning the behaviour of the inertinite-rich coals used on coke-making charges. Using density gradient centrifugation, some inertinitic coals of different rank have been separated into maceral concentrates. For the inertinite thermoplastic property assessment, a number of established test methods were used as: thermogravimetry, plastometry and optical microscopy. Examination of the results shows that the separation procedure provides interesting information concerning not only the obvious differences between vitrinite and inertinite concentrates, but also within maceral groups. The carbonization behaviour of inertinite macerals has been examined and the ratio between reactive and inert textural components in cokes has been quantified by microscopic techniques and expressed as anisotropic/isotropic quotient.
Keywords: inertinite, density centrifugal separation, thermoplastic properties, coke microtexture