Sub-bituminous coal
Sub-bituminous coal is an intermediate rank of coal that bridges the gap between lignite and bituminous coal. It plays a crucial role in modern energy systems, particularly in power generation,…
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,…
Medium-volatile bituminous coal
Medium-volatile bituminous coal is a widely used and geologically important type of hard coal that sits in the mid-range of the coal rank scale. It combines relatively high fixed carbon…
High-volatile bituminous coal
High-volatile bituminous coal occupies an important place among the ranks of coal used around the world. This article summarizes its geological characteristics, where it occurs and is mined, economic and…
Bituminous coal
Bituminous coal is one of the most important and widely used ranks of coal worldwide. It occupies an intermediate position in the coalification scale between sub-bituminous coal and anthracite, combining…
Steam coal
Steam coal, commonly referred to as thermal coal, is the coal type primarily used to produce heat and generate electricity. Unlike metallurgical coal used in steelmaking, steam coal is burned…
Thermal coal
Thermal coal, commonly known as steam coal, is one of the most important fossil fuels in modern energy systems. It is primarily used to generate electricity and as a heat…
PCI coal (Pulverized Coal Injection)
The following article examines pulverized coal injected into blast furnaces — commonly known as PCI (Pulverized Coal Injection) coal — covering its geological occurrence, mining regions, technical characteristics, economic and…
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Semi-soft coking coal
Semi-soft coking coal occupies an important middle ground in the world of metallurgical coals. It is neither the highest-grade hard coking coal used to produce premium blast-furnace coke nor the…
Soft coking coal
Soft coking coal occupies a specific and important niche within the family of bituminous coals. It combines properties that make it partially suitable for metallurgical processes, particularly when blended with…
