The moisture, ash, total humic acid and free humic acid of the brown coal were analyzed.
对褐煤水分、灰分、总腐植酸、游离腐植酸、进行了分析和评价。
It is also found that there is an approximate linear correlation between the yields of gas and tar of coal and the volatile matter of coal on dry, ash-free basis.
煤的干馏气和焦油产率与煤中可燃基挥发分之间有近似的线性关系。
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 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；
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