... 国际煤层煤分类中,含水无灰基高位发热量15MJ/kg到低于20MJ/kg的低煤阶煤。代表符号LRB。 次烟煤 subbituminous coal 国际煤层煤分类中,含水无灰基高位发热量20MJ/kg到低于24MJ/kg的低煤阶煤。代表符号LRA。 ...
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laminated subbituminous coal 层状次烟煤
Bituminous and Subbituminous Coal Combustion 烟煤和次烟煤的燃烧
subbituminous A coal A级半烟煤
subbituminous B coal B级半烟煤
subbituminous C coal C级半烟煤
Iodine levels increase from lignite through subbituminous coal and bituminous coal to anthracite,it indicates that coal adsorbed excess iodine from the hydrothermal fluids during the process of metamorphism,including geothermal metamorphism and telemagmatic metamorphism.
从褐煤、亚烟煤、烟煤到无烟煤,碘的含量越来越高,表明在变质作用(含深成变质作用和区域岩浆热变质作用)过程中煤吸收了热液流体中的碘。
参考来源 - 中国煤中碘的环境地球化学研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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