• June 25, 2026
Rampa Norte Coal Mine – Colombia

The Rampa Norte Coal Mine is one of the many mining sites located in Colombia’s rich northern coal belt. This article examines its geographic setting, what is extracted, the type…

  • May 24, 2026
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…

  • May 1, 2026
Indominco Mandiri Mine – Indonesia

This article provides an in-depth look at the Indominco Mandiri coal mining operations in Indonesia, covering its location, geology, the type of coal produced, mining methods, economic and statistical aspects,…

  • November 30, 2025
Low-volatile bituminous coal

Low-volatile bituminous coal is a high-rank coal grade prized for its elevated carbon content, strong coking properties and relatively low volatile matter. This article examines its geological characteristics, global distribution,…