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how separate coal from rocks

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Description:Sep 17, 2019018332Because coal undergoes physical and chemical changes as a result of increased heat, there is sometimes a misconception that coal is a metamorphic rock. Coal is a sedimentary rock. Coal is altered through biological and burialthermal processes into different ranks. Many sedimentary rocks are also altered through burialthermal processes ...

SourceAccess Heavy Industries Co., Ltd. China(Mainland)

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