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About 300 coal samples were collected to study the fluorine content and distribution pattern in Chinese coals in different coal basins and geologic periods. The Permo-Carboniferous and Jurassic coals in the North China Plate and Northwest China account for nearly 90% of Chinese coals and their fluorine content is 20-300 mg/kg, mostly about 50-100 mg/kg. Fluorine content of Permo-Carboniferous coals,...
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