With the coal rank reduced, the light component content of the ash-free ash obtained would be increased.

随着煤阶的降低，得到的无灰煤中轻组分含量增加；

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。

The effects of coal rank, cyclone and operation condition on the carbon content in fly ash were analyzed.

分析了煤质、分离器及运行条件对飞灰含碳量的影响。

The necessity of expanded coal rank for CWM production and saving coking coal resources were dis - cussed in this paper.

阐述了节约炼焦煤资源，扩大制备水煤浆煤种范围的必要性。

The results indicate that absorption energy is related with coal rank, especially with volatile matter form a linear relation.

计算结果表明，吸附热与煤的变质程度有关，特别是与煤的挥发分成线性负相关。