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Coal and coke petrographic investigations into the fusibility of Carboniferous and Permian coking coals

1987; Elsevier BV; Volume: 9; Issue: 1 Linguagem: Inglês

10.1016/0166-5162(87)90066-8

1872-7840

Claus F. K. Diessel, Evamarie Wolff-Fischer,

Coal and Its By-products

For the purpose of conducting coal/coke mass balance calculations ten Australian coals of Permian age and twenty Carboniferous coals from the Ruhr district of Germany have been carbonized, and both feed coal and coke samples have been subjected to petrographic and other laboratory analyses. The results demonstrate that inertinite dissociates thermally into four components: (1) gas and liquor; (2) fused coke matrix (FCM); (3) partly fused coke inclusions (PFCI); and (4) unfused coke inclusions (UFCI). Fluorescence intensity measurements offer the best means of identification of the boundaries between the above groups and, in doing so, divide coal components into fusible, partly fusible and infusible constituents without the need to refer to any maceral classification. Fluorescence intensity cut-offs for the three solid categories have been determined. They correspond to 3% 1 650 w for FCM/PFCI and 1.5% for PFCI/UFCI.