Raw sub-bituminous coal
This article examines raw sub-bituminous coal: its nature, where it occurs, how and where it is mined, its economic and industrial roles, and environmental and policy considerations. Sub-bituminous coal occupies…
Explosive-grade coal dust
Explosive-grade coal dust is a hazardous but economically significant form of fossil fuel material. Finely divided coal particles suspended in air can form highly combustible clouds that, when ignited, produce…
Geologically mature coal
Geologically mature coal represents the high end of the coalification continuum: material that has been subjected to prolonged burial, heat and pressure, and in many cases tectonic deformation and regional…
Underground-mine coal
Underground-mine coal — commonly referred to as coal extracted from deep seams below the earth’s surface — remains a cornerstone of global industry, energy systems and regional economies. This article…
Qipanjing Coal Mine – China
The Qipanjing coal mining area, located in northern China, is a significant component of the country’s vast coal landscape. This article examines the mine’s location, geology, the types of coal…
Power-grade lignite
This article examines brown coal (lignite), commonly referred to as power-grade lignite, describing its geological nature, global distribution, mining and processing methods, economic and industrial roles, environmental impacts and the…
Fine steam coal
The following article examines fine steam coal — a category of thermal coal characterized by its small particle size and primary use in power generation. It covers geological occurrence, mining…
Anthracite briquettes
Anthracite briquettes are a concentrated, manufactured fuel derived from the highest-rank coal, prized for their high carbon content, low impurities and efficient combustion. This article explores the geology and distribution…
Smokeless coal
Smokeless coal is a category of coal and coal-derived fuels valued for their low visible smoke output when burned, making them desirable for domestic heating and certain industrial processes where…
Sub-bituminous C
Sub-bituminous C is a specific rank of coal that plays a quiet but important role in global energy systems. Positioned between lignite and higher-rank bituminous coals, sub-bituminous C combines relatively…
