Less dense types, such as sub-bituminous and lignite coal, can contain up to 50% water.
低浓度的煤炭，如亚煤烟煤和褐煤等，其含水量最高可达50%。
This paper also investigates the oxidation process and mechanism of inhibition for lignite, bituminous and high sulphur coals from the viewpoint of reactant activation energy and surface active sites.
用反应物的活化能、表面活性中心的观点，探讨了褐煤、烟煤、高硫煤的氧化过程及阻化机理。
The differential thermal curve of the lignite coal is similar to that of the bituminous coal in the two thermopositive peak values.
褐煤与烟煤的差热曲线相近，其特点是有两个热解放热峰。
In the bottom of coal measures is an acidic intrusive body, it is direct heat source of metamorphism, and provided the conversion of lignite to bituminous coal with thermodynamic power.
在本区煤系地层底部有一酸性侵人岩体，该侵入岩体是引起本区煤变质的直接热源，它提供了褐煤向烟煤转化的热动力。
To sum up, the study of coal metamorphism has guiding significance in bituminous coal prediction in Yimin coalfield and Hailar lignite basin.
研究该区煤变质规律对伊敏煤田及海拉尔褐煤盆地烟煤预测具有指导作用。
To sum up, the study of coal metamorphism has guiding significance in bituminous coal prediction in Yimin coalfield and Hailar lignite basin.
研究该区煤变质规律对伊敏煤田及海拉尔褐煤盆地烟煤预测具有指导作用。
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