Coal tailings
Coal tailings are the residual material left after the physical processing of coal (washing and beneficiation) and after coal extraction operations. They represent a complex mixture of fine coal particles,…
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…
Coal concentrate
Coal concentrate is a processed form of coal produced by cleaning and concentrating raw coal to increase its energy content and reduce impurities. It plays a key role in modern…
Super-fine coal powder
Super-fine coal powder occupies an important, though often overlooked, niche in the global energy and materials landscape. Produced either intentionally through milling or as a by-product of mining and preparation,…
Fine steam coal
The following article examines fine steam coal — a category of thermal coal characterized by its small particle size and primary use in power generation. It covers geological occurrence, mining…
Pulverized thermal coal
Pulverized thermal coal plays a central role in electricity generation and industrial heat processes worldwide. Frequently ground to a fine powder and burned in large boilers, this form of coal…
Coal-to-chemicals feedstock
This article explores the role of coal as a feedstock for coal-to-chemicals processes: where this resource is found and mined, how it is converted into chemical intermediates, its economic and…
Coal-to-liquid feedstock
This article examines coal as a feedstock for coal-to-liquid (CTL) processes: its geology, global occurrence, mining and supply, economic importance, statistics, industrial uses, environmental challenges and technological trends. Coal remains…
Liquefaction coal
This article examines coal liquefaction — the technologies, geology, economics, industry relevance and environmental consequences of converting solid coal into liquid fuels and chemicals. Coal liquefaction has a long technical…
Gasification-grade sub-bituminous coal
This article examines gasification-grade sub-bituminous coal: its geological characteristics, global distribution, mining and supply patterns, technical suitability for coal gasification and related processes, economic and market aspects, environmental considerations, and…
