Metallurgical middlings
This article discusses the category known as metallurgical middlings — intermediate coal products generated in the preparation of metallurgical coal (also called coking coal). It explains what middlings are, where…
Listvyazhnaya Mine – Russia
Listvyazhnaya Mine is one of the coal mining sites located in the heart of the Russian coal-producing region of western Siberia. The mine became internationally known after a major accident…
Coal middlings
This article examines the phenomenon commonly called coal middlings — the intermediate-sized, intermediate-quality fractions produced during coal mining and preparation. Coal middlings occupy a complex place between high-grade clean coal…
El Descanso Coal Mine – Colombia
This article examines the El Descanso coal mine in Colombia, exploring its location, the type of coal produced, geological setting, mining methods, economic and social roles, and environmental and regulatory…
High-volatile B coal
High-volatile B coal occupies an important place in the global spectrum of fossil fuels. As a specific sub-rank within the broader category of bituminous coals, it combines distinct physical and…
Komsomolets Mine – Russia
The Komsomolets Mine is one of several coal mining sites across the Russian Federation and the post-Soviet space that bear the historical name Komsomolets. While individual mines with this name…
Ultra-supercritical coal grade
The term ultra-supercritical is most commonly associated with advanced steam cycle technology used in coal-fired power plants, not a standalone type of coal. However, certain coal qualities are particularly suitable…
Supercritical coal grade
This article examines the concept commonly referred to as supercritical coal grade and, more broadly, the relationship between coal quality and the technologies known as supercritical and ultra-supercritical power plants.…
Long-flame coal
Long-flame coal is a historically important and still widely used category of coal characterized by its distinctive burning behavior, broad occurrence in many coal basins, and versatile industrial applications. This…
Medium-volatile bituminous coal
Medium-volatile bituminous coal is a widely used and geologically important type of hard coal that sits in the mid-range of the coal rank scale. It combines relatively high fixed carbon…
