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off-grade iron

См. также в других словарях:

  • Iron ore — Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in colour from dark grey, bright yellow, deep purple, to rusty red. The iron itself is usually found in the …   Wikipedia

  • Iron Man's armor — refers to the powered metal suit worn by Tony Stark when he assumes his superhero role of Iron Man. The first version of the armor was created by Stark with the help of Ho Yinsen. Unlike most other superheroes, the appearance of Stark s armor has …   Wikipedia

  • iron processing — Introduction       use of a smelting process to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of iron and of its preparation for smelting.       Iron (Fe) is a… …   Universalium

  • Cutoff grade — In mining, the mine cutoff grade is the level of mineral in an ore below which it is not economically feasible to mine it. The mill cutoff grade is the level below which already mined ore is not worth processing. The mine cut off grade is… …   Wikipedia

  • Oregrounds iron — Statue of Louis de Geer (1587 1652) in Norrköping, Sweden. De Geer introduced the Walloon method to Sweden. Oregrounds iron was a grade of iron that was regarded as the best grade available in 18th century England. The term was derived from the… …   Wikipedia

  • Duluth, Missabe and Iron Range Railway — Map of the DM IR. Solid lines are track still in use; dotted lines are abandoned track …   Wikipedia

  • Maanshan Iron and Steel Company — Infobox Company company name = Maanshan Iron Steel Company Limited 马鞍山钢铁股份有限公司 company company type = State owned enterprise genre = foundation = 1993 founder = location city = flagicon|China Maanshan, Anhui location country = China location =… …   Wikipedia

  • North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …   Universalium

  • Natural resource economics — Economics …   Wikipedia

  • Europe — /yoor euhp, yerr / for 1; /yoo roh pee, yeuh / for 2, n. 1. a continent in the W part of the landmass lying between the Atlantic and Pacific oceans, separated from Asia by the Ural Mountains on the E and the Caucasus Mountains and the Black and… …   Universalium

  • Coal breaker — A coal breaking plant, depicted on a postcard in 1907. A coal breaker was a coal processing plant which broke coal into various useful sizes. Coal breakers also removed impurities from the coal (typically slate) and deposited them into a culm… …   Wikipedia

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