Classification and Rank of Coal. University of Kentucky

Anthracite is the last of the classifications, and this terminology is used when the coal has reached ultimate maturation. Anthracite coal is very hard and shiny. The degree of alteration (or metamorphism) that occurs as a coal matures from peat to anthracite is referred to as the "rank" of the coal.

Coal Classification – Southeastern Kansas Coals – KGS – Classification

The rank of coal is its stage of coalification in the series peat, lignite, bituminous coal, and anthracite coal. Differences in the history of formation of coal are reflected in its present lithology and properties.

Rank – Define Rank at Dictionary.com

The classification of coal according to hardness, from lignite to anthracite. A row, line, or series of things or persons: orchestra players arranged in ranks. To arrange in ranks or in regular formation: The men were ranked according to height. The colonel ranks all other officers in the squadron.

Coal – U.S. Energy Information Administration (EIA) – Data

PDF XLS by State and Coal Rank. PDF XLS at Manufacturing Plants by North American Industry Classification System (NAICS) Code. S Coal by Origin State, Consumer, Destination and Method of Transportation. 2011 Gross Heat Content of Coal Production (Thousand Btu Per Short Ton).

Coal – Wikipedia

An experimental way of coal combustion is in the form of coal-water slurry fuel (CWS), which was well-developed in Russia since the days of the Soviet Union CWS significantly reduces emissions, improving the heating value of coal.

All Coal is Not Created Equal

The coal ranking is based on levels of geological metamorphosis, fixed carbon, and calorific value, and known as ASTM D388 – 05 Standard Classification of Coals by Rank. Australia tops the world wide list of coal exporters, having sent 298 million tonnes of coal overseas in 2010.

Encyclopedia of Earth – Definition of coal fires – Coal fires

Classification of coal fires. Today, China is the leading country concerning coal production, consumption and export, whereas Russia and the US rank first and second in terms of coal reserves on a global scale. Depending on cause, location, age and burning intensity, coal fires can be classified into different types.

Elsevier Science – Coal Flotation and Fine Coal Utilization – 978-0-444-50537-8 – Elsevier

Effect of coal rank on floatability. And scientists researching the field of coal surface chemistry, flotation and fine coal utilization will find this volume of great interest. This is a well-written text which needs to be available to people involved in this area of coal production.

ia Department of Mines, Minerals and Energy – Division of Geology and Mineral Resources

Coal is defined as "a readily combustible rock containing more than 50% by weight and more than 70% by volume of carbonaceous material including inherent moisture, formed from compaction and induration of variously altered plant remains similar to those in peat. Differences in the kinds of plant materials (type), in de…

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