Torrefied lignite
This article examines torrefied lignite — a processed form of low-rank coal — describing what it is, where it occurs and is produced, the technologies used to convert lignite into…
La Estrella Coal Mine – Colombia
This article provides a comprehensive overview of the La Estrella coal mine in Colombia, covering its location, geology, mining methods, economic role, social impacts, environmental considerations, and future prospects. The…
La Esperanza Mine – Colombia
The following article examines the La Esperanza mining sites within the context of Colombia’s coal industry. Because the name La Esperanza is used for multiple small- and medium-sized mining operations…
Stabilized lignite
Stabilized lignite is a processed form of brown coal designed to overcome many of the raw material’s handling, transportation and combustion challenges. Through mechanical, thermal or chemical treatments, lignite’s high…
La Bahía Mine – Colombia
La Bahía Mine is one of the many coal-producing sites that form part of Colombia’s extensive northern coal belt. This article provides a comprehensive overview of the mine—its geological setting,…
Dried lignite fuel
This article examines dried lignite as a fuel: what it is, where it forms and occurs, how it is mined and processed, its economic and industrial role, and the environmental…
Kwamhlanga Coal Mine – South Africa
The following article provides a detailed overview of the Kwamhlanga Coal Mine in South Africa, combining geological, operational, economic and social perspectives. Where mine-specific public data are limited, the discussion…
Upgraded lignite
This article explores Upgraded lignite — a processed form of lignite or brown coal that has been mechanically or thermally treated to improve its properties for transport, storage and end-use.…
Krasnobrodskiy Coal Mine – Russia
The following article offers a comprehensive overview of the Krasnobrodskiy Coal Mine as reported in public and industry sources, and places it in the broader context of Russian coal mining.…
Heat-treated coal
Heat-treated coal is a family of coal-derived products produced by applying controlled thermal processes to raw coal. These processes change the coal’s physical and chemical properties to yield materials with…









