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    (An English-Chinese Ship Dictionary,52564) MSC,。 。 :""()->""(このページの)->。

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    Evolution of Blast Furnace Iron Making. The origin of the first smelting of iron is concealed in the unrecorded history of human civilization. The first evidence of iron implements being used in ancient times actually comes from Egypt where an iron tool was found in a joint between two stones in a pyramid.

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    (A) abrasive paper abrasive base paper absorbing paper ; account book paper

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    When iron is smelted from its ore, it contains more carbon than is desirable. To become steel, it must be reprocessed to reduce the carbon to the correct amount, at which point other elements can be added.

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  • Iron processing | Britannica.com

    Iron processing: Iron processing, 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.

  • Emerging Technologies for Iron and Steelmaking - TMS

    There are several methods by which a limited supply of hot metal could be stretched by increasing scrap utilization. Process optimization of current oxygen steelmaking technologies will result in small improvements in yield by reducing both the iron content and total volume of slag produced.

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  • Steelemart

    How Steel Is Made : Carbon Scrap Integrated and minimill steel producers consume scrap in their steelmaking processes. The minimills use scrap as a primary feed; the integrateds use it as a supplemental feed for 10-40% of the basic oxygen furnace inputs.

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    Income tax: effective life of depreciating assets (applicable from 1 July 2007) (Current from 27 June 2007 to 3 July 2007)