低灰煤是开发煤炭应用新领域的前提。
Low ash coal is a precondition to develop a new area of coal utilization.
煤中所含钙基组分对固硫有利，石灰石对低灰熔点煤高温固硫不利。
The Ca-based matter in coal was beneficial to sulfur fixation, and low coal ash fusibility was disadvantage to fixation sulfur.
泥炭沼泽几乎不受咸水和活动碎屑体系的影响是主要煤层低硫低灰的原因。
The major reasons for low ash and sulfur incoal beds are that saline water and active clastic systems were nearly no influence upon the swamps when peatswere accumulated.
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