Anthracite coal is a mineral, dark hues are bright blue is often used in the smelting of metals especially hierroa mixed with bituminous coals, A can be found also as water filters, and, A in combination with coal for steam generation and its further use in generating electricity. The Anthracite coal is the mineral which has the largest amount of pure carbon, easily exceeds 90%, has a calorific value of between 23 and 33 MJ / kGy has its origin in a process called coalification which is nothing else than the transformation of organic materials by gradual migration at moderate temperatures and high pressure in peat and coal, thanks to a incomplete dehydrogenation. All this happens in two stages, the first corresponding to the decomposition of organic matter by aerobic bacteria that live in wet beds, at this stage the organic waste may have reduced in volume Significantly, some authors placed in the order of 50%, as is understood, this process ends with the death of bacteria due to lack of oxygen and then when it gives rise to the second stage of transformation, this is verified in However, with the help of anaerobic bacteria which produce acids, which ultimately determine the annihilation of them. Giving rise to what is known as peat, as is evident in their natural state continues this process, continually making more peat deposit on the above, this results in a gradual increase in temperature to reach 100 C, Over time, high pressure and temperature, coal ore is concentrated to form lignite and then.
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