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。
2
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。
3
With the coal rank reduced, the light component content of the ash-free ash obtained would be increased.