what are the different grades of coal

Best answer


The four ranks are:Anthracite: The highest rank of coal. …Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite. …Subbituminous: Subbituminous coal is black in color and is mainly dull (not shiny). …Lignite: Lignite coal,aka brown coal,is the lowest grade coal with the least concentration of carbon. …

People also ask


  • How many types of coal are there?

  • There are four major types (or 鈥渞anks鈥? of coal. Rank refers to steps in a slow, natural process called 鈥渃oalification,鈥?during which buried plant matter changes into an ever denser, drier, more carbon-rich, and harder material. The four ranks are: Anthracite: The highest rank of coal.

  • What is the highest rank of coal?

  • Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite.

  • What are the characteristics of coal?

  • All types of coal contain fixed carbon, which provides stored energy and varying amounts of moisture, ash, volatile matter, mercury, and sulfur.

  • What type of coal has the least amount of carbon?

  • Lignite: Lignite coal, aka brown coal, is the lowest grade coal with the least concentration of carbon. Also, there is peat. Peat is not actually coal, but rather the precursor to coal. Peat is a soft organic material consisting of partly decayed plant and, in some cases, deposited mineral matter.

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