Anthracite – Stage Four Anthracite, the fourth stage in coal formation, is also known as “hard coal” because it is hard and has a high lustre. Anthracite coal generally has the highest heating value per ton on a mineral matter free basis. It is often subdivided into semi-anthracite, anthracite and meta-anthracite on the basis of carbon content. Bituminous coal is formed under more heat and pressure, and is 100 million to 300 million years old. Anthracite Coal vs Bituminous Coal . As the … When burned, it produces a very hot, blue flame. These grades of coal are known as ranks - read more about coal ranks. Importance of each type. Coal forms from the accumulation of plant debris, usually in a swamp environment. Anthracite - is the highest rank of coal which means that it has the highest heating value and highest carbon content. What is the difference between Anthracite and Bituminous Coal? Coal is a solid, black, readily combustible fossil fuel that contains a large amount of carbon-based material - approximately 50% of its weight. Anthracite was formed during the Carboniferous Age, when the dense green vegetation that If you know the answer to this question, please register to join our limited beta program and start the conversation right now! Anthracite – Stage Four Anthracite, the fourth stage in coal formation, is also known as “hard coal” because it is hard and has a high lustre. answer to Can coal produced from Singareni mines produce gases? Anthracite Anthracite is the highest rank of coal. Anthracite burns with a short flame and little smoke. Anthracite burns with a short flame and little smoke. It has a carbon content of over 87% on a dry ash-free basis. Contains carbon, volatile matter, moisture and ash Mostly used for power generation and metallurgy. ; It was formed around 300 million years ago when the earth was covered with swampy forests. Anthracite is a high-rank coal, representing a coal that has been subjected to the highest grade of metamorphism. The formation of coal takes a significant amount of time (on the order of a few million years), and the first coal-bearing rock units appeared about 290-360 million years ago, at a time known as the Carboniferous or "coal-bearing" Period. Coal formed millions of years ago when the earth was covered with huge swampy forests where plants - giant ferns, reeds and mosses - grew. • Anthracite has a higher quality than the bituminous coal. THE ANTHRACITE ADVANTAGE A FACT SHEET ON ANTHRACITE COAL What is Anthracite? Coal is formed by collecting plant debris in swamps. It contains about 45-86% carbon. How is anthracite coal formed? For example, anthracite is harder, produces more energy when burned, does not ignite easily, have a low amount of impurities and a higher carbon percentage compared to bituminous coal. Anthracite is often referred to as "hard coal"; however this is a layman's term and has little to do with the hardness of the rock.