• 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,…