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- W80445329 abstract "The changes in petrographic composition and in some technological properties of coal have been investigated in the deposit, as well as during the exploitation and preparation process of coal, i.e. from seam to saleable coal. The changes have been presented as an example of two seams in which coal shows similar reflectance (0.91-0.93%), but which differ in petrographic composition and technological parameters. It has been ascertained that the petrographic composition of coal during technological processing undergoes changes, which are dependent on the processing method. The changes of petrographic composition are accompanied by changes of the technological parameters of coal. These lie mainly in significant increase, in the final product, of the content of the vitrinite macerals group. Amongst microlithotypes an important increase in vitrite contents is observed; it is greater the smaller the final product fraction is. The content of clarite, as well as vitrinertite and trimacerite increases slightly, which in the case of the last two materials is particularly true for bigger fractions. the content of carbominerite and rock material significantly decreases independent of fraction size." @default.
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- W80445329 date "2004-01-01" @default.
- W80445329 modified "2023-09-26" @default.
- W80445329 title "CHANGES IN THE PETROGRAPHIC COMPOSITION OF COAL DURING COAL PROCESSING" @default.
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