With the rise of the coal rank, the crystallinity of kaolinite and its order in the anthracite bed go up.

随着煤变质程度的升高，煤层夹矸中高岭石的结晶度、有序度也随之升高。

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Based on "The Data Bank of Chinese coal Rank source" coal sources and characteristics of Huabei district were analysed and evaluated.

本文以《中国煤种资源数据库》的数据为主要依据，对华北区煤炭资源及煤质特征进行了分析评定。

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The effects of coal rank, pyrolytic temperature of coal and mineral matter in coals or chars on their ignition temperature were determined.

使用可在加压下测定着火点的装置，研究了煤化程度、煤中矿物质和煤焦干馏温度对煤或煤焦的催化着火的影响。

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GuruFocus rated Arch Coal Inc the business predictability rank of 3.5-star.

FORBES: Markel's Gayner Buys Alliance Holdings, Moody's, Norfolk Southern, Sells Sysco, Vodafone

Today (July 14), Peabody announced a deal with the Xinjiang Uyghur Autonomous Region of China to develop a 50 million ton per year surface mine a giant project that would rank as one of the biggest coal mines in the world.

FORBES: Peabody Coal Is On Fire With New Deals