what is steel company

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What is a steel mill or a steel company?
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Steel mill or steel company

• A steel mill or steelworks is an industrial plant
  for the manufacture of steel. It may be an
  integrated steel works carrying out all steps
  of steelmaking from smelting iron ore to rolled
  product, but may also describe plants where
  steel semi-finished casting products (blooms,
  ingots, slabs, billets) are made, from molten pig
  iron or from scrap.
• Since the invention of the Bessemer process,
  steel mills have replaced ironwork, based
  on puddling or fining methods. New ways to
  produce steel appeared later from scrap melted
  in an electric arc furnace and, more recently,
  from direct reduced iron processes.
• In the late 19th and early 20th centuries the
  world's largest steel mill was the Barrow
  Hematite Steel Company steelworks located
  in Barrow-in-Furness, United Kingdom. Today, the
  world's largest steel mill is in Gwangyang, South
  Korea.12

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Integrated mill

• An integrated steel mill has all the functions
  for primary steel production
• iron making (conversion of ore to liquid iron),
• steel making (conversion of pig iron to liquid
  steel),
• casting (solidification of the liquid steel),
• roughing rolling/billet rolling (reducing size of
  blocks)
• product rolling (finished shapes).

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• The principal raw materials for an integrated
  mill are iron ore, limestone, and coal (or coke).
  These materials are charged in batches into
  a blast furnace where the iron compounds in the
  ore give up excess oxygen and become liquid iron.
  At intervals of a few hours, the accumulated
  liquid iron is tapped from the blast furnace and
  either cast into pig iron or directed to other
  vessels for further steel making operations.
  Historically the Bessemer process was a major
  advancement in the production of economical
  steel, but it has now been entirely replaced by
  other processes such as the basic oxygen furnace.
• Molten steel is cast into large blocks
  called blooms. During the casting process various
  methods are used, such as addition of aluminum,
  so that impurities in the steel float to the
  surface where they can be cut off the finished
  bloom.

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Mini mill

• A minimill is traditionally a secondary steel
  producer however, Nucor (one of the world's
  largest steel producers), as well as one of its
  competitors, Commercial Metals Company (CMC) use
  mini mills exclusively. Usually it obtains most
  of its iron from scrap steel, recycled from used
  automobiles and equipment or byproducts of
  manufacturing. Direct reduced iron (DRI) is
  sometimes used with scrap, to help maintain
  desired chemistry of the steel, though usually
  DRI is too expensive to use as the primary raw
  steelmaking material. A typical mini-mill will
  have an electric arc furnace for scrap melting,
  a ladle furnace or vacuum furnace for precision
  control of chemistry, a strip or
  billet continuous caster for converting molten
  steel to solid form, a reheat furnace and
  a rolling mill.

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• Originally the mini mill was adapted to
  production of bar products only, such
  as concrete reinforcing bar, flats, angles,
  channels, pipe, and light rails. Since the late
  1980s, successful introduction of the direct
  strip casting process has made mini mill
  production of strip feasible. Often a mini mill
  will be constructed in an area with no other
  steel production, to take advantage of local
  markets, resources, or lower-cost labor. Mini
  mill plants may specialize, for example, in
  making coils of rod for wire-drawing use, or
  pipe, or in special sections for transportation
  and agriculture.

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Steel Companies

• Steel House Construction Co. LLC
• PO Box 3346, SHARJAH, UAE
• Telephone [phone]
• Fax No (971) 6-544 9553
• Email info_at_steelhousellc.com
• Web www.steelhousellc.com