Ensuring stable coke properties

Plastometric method in the identification of coal from new and old deposits

“…Recently, however, some researchers have written that, "regrettably, the thickness of the plastic layer pro vides little information, especially for coal with poor clinkering properties" [3,4]. This assertion was made earlier in [1,2]: "Because y provides little information, producers of coal for the coke industry are able to engage in deceptive rank assignment.…”

“…Therefore, we employ several characteristics. It would be possible to add Vt to State Standard GOST 25543-88, as proposed in [3,4]. Note, how ever, that petrography does not determine the initial oxidation of the coal, whereas plastometry does.…”

“…Of course, the 1 mm deviation permitted in the standard leaves scope for rank manipulation, as noted in [1][2][3][4]. The method and apparatus used for plastometric analysis are of critical importance here.…”