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anthracite |
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anthraciteHard, dense, shiny variety of coal, containing over 90% carbon and a low percentage of ash and impurities, which causes it to burn without flame, smoke, or smell. Because of its purity, anthracite gives off relatively little sulphur dioxide when burnt. Anthracite gives intense heat, but is slow-burning and slow to light; it is therefore unsuitable for use in open fires. Its characteristic composition is thought to be due to the action of bacteria in disintegrating the coal-forming material when it was laid down during the Carboniferous period. Among the chief sources of anthracite coal are Pennsylvania in the USA; South Wales, UK; the Donbas, Ukraine and Russia; and Shanxi province, China. |
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Molding sands with sea coal and sea coal substitute exhibited greater high temperature strength than the base sand or the sand with hard coal. Poland is among the world's leading producers and consumers of coal, with recoverable reserves of hard coal (bituminous and sub-bituminous) estimated at 41 billion tons. An auction for the delivery period 2007-2009 offered two products for sale: 100 MW referenced to the index for hard coal published by the German Federal Office of Economics and Export Control (BAFA), and 200 MW referenced to the API#2 coal index. |
hard coal
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