经常海运的煤按照含碳量的高低,分为:褐煤(Lignite),含碳量25%~35%;次烟煤(Sub-Bituminous),含碳量35%~45%;烟煤(Bituminous),含碳量45%~85%;无烟煤(Anthracite),含碳量85%~95%。
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sub-bituminous coal 次烟煤 ; 较低的称做次烟煤
fushun sub-bituminous a 抚顺长焰煤
eocene sub-bituminous coal 始新世亚烟煤
The potential correlation between mercury and Chaoite in Alberta sub-bituminous coal was found.
发现了亚烟煤中汞与潮煤的潜在相关关系。
Less dense types, such as sub-bituminous and lignite coal, can contain up to 50% water.
低浓度的煤炭,如亚煤烟煤和褐煤等,其含水量最高可达50%。
Coal reserves total over 34 billion tonnes consisting primarily of sub-bituminous coal.
艾伯塔省煤总蕴藏量超过340亿吨,其中以亚烟煤为主。
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