141-144The degree of coking or completeness of carbonisation
in the production of industrial cokes/ chars is assessed with the help of appropriately
corrected percentage value of residual volatile matter. Although coke reflectance
has good correlation with final carbonisation temperature, its determination is
time consuming. As CV:FC ratio has been shown to ascertain the degree of devolatilisation
in heat altered coals, as well as in laboratory prepared cokes/chars it is worthwhile
to consider its utility for assessing the degree of carbonisation in industrial
coking practice too. Studies conducted on a range of industrial cokes/chars reveal
that CV:FC ratio :(i) is directly related to residual volatile matter percentage,
(ii) can differentiate between iso-volatile cokes/chars by assessing respective
degree of coking and (iii) can indicate the order of final coking temperature reached
even in cokes/chars having widely varying residual volatile matter percentages.It
may, therefore, be inferred that CV: FC ratios provide a simple alternative route
for assessing final coking temperature of industrial cokes/chars
