Antraasiitti

Antraasiitti is a type of coal, specifically the highest rank of coal. It is characterized by its high carbon content, typically ranging from 92% to 98%, and its low moisture and volatile matter content. This makes it the hardest and densest of all coals, with a glossy, often metallic luster. Anthracite burns with a short, blue flame, producing minimal smoke and soot, and is known for its high energy yield.

Geologically, anthracite is formed from the metamorphism of lower-rank coals, such as lignite and bituminous coal, under intense heat and pressure over millions of years. This process drives out most of the volatile compounds, leaving behind a material that is predominantly carbon. Deposits of anthracite are found in various regions around the world, though they are less abundant than those of lower-rank coals.

Historically, anthracite was a highly valued fuel due to its clean burning properties. It was particularly favored for domestic heating and in industrial applications where clean combustion was essential, such as in early steam engines and some manufacturing processes. While its use has declined in some areas due to the availability of other energy sources and environmental concerns, it remains a significant fuel in certain markets and applications. Its high energy density and clean combustion characteristics continue to make it an attractive option where its specific properties are advantageous.