Russian coking coal

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

“…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. "…”

“…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.…”