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What (who) is pulverized ore - definition
.jpg?width=200 "2.1-billion-year-old rock showing banded iron formation.")
![Evolution of the extracted iron ore grade in different countries (Canada, China, Australia, Brazil, United States, Sweden, USSR-Russia, world). The recent drop in world ore grade is due to the big consumption of low-grade Chinese ores. The American ore is upgraded between 61% to 64% before being sold.<ref>Graphic from [http://s3.amazonaws.com/zanran_storage/nzsses.auckland.ac.nz/ContentPages/953681807.pdf#page=5 The "Limits to Growth" and 'Finite' Mineral Resources, p. 5, Gavin M. Mudd]</ref>](https://commons.wikimedia.org/wiki/Special:FilePath/Evolution minerai fer.svg?width=200 "Evolution of the extracted iron ore grade in different countries (Canada, China, Australia, Brazil, United States, Sweden, USSR-Russia, world). The recent drop in world ore grade is due to the big consumption of low-grade Chinese ores. The American ore is upgraded between 61% to 64% before being sold.<ref>Graphic from [http://s3.amazonaws.com/zanran_storage/nzsses.auckland.ac.nz/ContentPages/953681807.pdf#page=5 The \"Limits to Growth\" and 'Finite' Mineral Resources, p. 5, Gavin M. Mudd]</ref>")
 (cropped).jpg?width=200 "Iron ore being unloaded at docks in Toledo, Ohio.")
![Stockpiles of iron ore pellets like this one are used in [[steel]] production.](https://commons.wikimedia.org/wiki/Special:FilePath/LightningVolt Iron Ore Pellets.jpg?width=200 "Stockpiles of iron ore pellets like this one are used in [[steel]] production.")
Wikipedia
A pulverized coal-fired boiler is an industrial or utility boiler that generates thermal energy by burning pulverized coal (also known as powdered coal or coal dust since it is as fine as face powder in cosmetic makeup) that is blown into the firebox.
The basic idea of a firing system using pulverised fuel is to use the whole volume of the furnace for the combustion of solid fuels. Coal is ground to the size of a fine grain, mixed with air and burned in the flue gas flow. Biomass and other materials can also be added to the mixture. Coal contains mineral matter which is converted to ash during combustion. The ash is removed as bottom ash and fly ash. The bottom ash is removed at the furnace bottom.
This type of boiler dominates coal-fired power stations, providing steam to drive large turbines.
