Stean Coal

Steam coal – Multi-purpose coal for industrial needs
Steam coal is a type of coal used to generate big amounts of energy to meet the world's energy demands. The steam produced when burned runturbines that in turn generate electricity either to public electricity grids or directly by industry consuming electrical power, such as chemical industries, paper manufacturers, cement industry andbrickworks.  
During power generation, steam coal is ground into a fine powder to increase surface area and allow for quicker burn and then fired into a combustion chamber of a boiler to produce thenecessary steam to drive the turbines that will ultimately produce electricity. Besides being a source for power generation, this type of coal also helps maintain the carbon content of the metal product.Also called thermal coal, steam coal can also be used for steel manufacturing, by a process called pulverized coal injection (PCI). In PCI, thermal coal is finely crushed, mixed with coking coal andinjected into the blast furnace during firing. The most remarkable aspect of this method is that it allows for cheaper coal to be consumed in the system, replace expensive coke and thereby cutting downcosts.
Burning thermal coal to generate electricity leaves behind coal ash, specifically bottom ash and fly. Bottom ash settles to the floor of the furnace while fly ash is carried upward bycombustion gases. Bottom ash is used as an aggregate in concrete and cold mixed asphalt, and as a structural fill for cement stabilized bases in highway construction. Fly ash is used as an aggregate forhighway subgrades.
Steam coal supplies a high percentage of the energy that drives world economy, as power plants that utilize this type of coal provide over 40% of the world's electricity. Major coalsuppliers in the world include Australia, South Africa, Russia, the United States and Colombia.
Colombian coal is in high demand, as it meets worldwide sulfur regulations and is also very low in...