Coal grit

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As carbon (s) grus or coal (n) is small is called in the coal mining small, square-edged, irregular pieces of coal that in promoting and transport of coal chipped from coal rock and break off. In earlier times, coarse grits were unsuitable for combustion and mostly remained in the struts ; Only the briquetting process made it possible to use the otherwise undesirable coal grit economically.

The term "grus" generally stands for a loose, medium-grain substance (word related to semolina , grits and the English grit ) and can also be found in the word weathering grit . The latter has nothing to do with coal grit, but is created by the decay of granite rock .