Slack coal
This article examines slack coal — a term used in coal-producing regions to describe the small pieces, fragments and fines that remain after mining and initial processing. Although often treated…
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…
Thermal middlings
Thermal middlings are an often-overlooked but important fraction of coal that plays a practical role across mining, coal preparation and power-generation value chains. This article explains what thermal middlings are,…
