• August 19, 2026
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…

  • August 9, 2026
Nut coal

Nut coal is a widely recognized commercial grade of coal, principally defined by its particle size and practical applications rather than by a single chemical composition. It occupies a middle…

  • May 15, 2026
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…

  • January 1, 2026
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…

  • December 23, 2025
Steam-raising coal

Steam-raising coal, often referred to as steam coal or thermal coal, is the class of coal primarily used to generate steam for electricity production and industrial heat. This article examines…