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An ingot of steel entering a rolling mill. A minimill is traditionally a secondary steel producer; however, Nucor (one of the world's largest steel producers) and Commercial Metals Company (CMC) use minimills exclusively. Usually it obtains most of its iron from scrap steel, recycled from used automobiles and equipment or byproducts of ...
Steel mill with two arc furnaces. Steelmaking is the process of producing steel from iron ore and/or scrap. Steel has been made for millennia, and was commercialized on a massive scale in the 1850s and 1860s, using the Bessemer and Siemens-Martin processes. Two major commercial processes are used.
For many years, the Gary Works was the world's largest steel mill, and it remains the largest integrated mill in North America. [1] It is operated by U.S. Steel. The Gary Works includes both steelmaking and finishing facilities as an integrated mill, and has an annual capacity of 8.2 million tons. [2] It contains: [3] Four blast furnaces
Large versions, often having capacities in excess of 100 tonnes (98 long tons; 110 short tons) are used in steel mills are often referred to as torpedo ladles. [citation needed] Torpedo ladles are commonly used to transport liquid iron from a blast furnace to another part of the steel mill. Some versions are even adapted so that they can be ...
Most of the steel produced has been by the growing number of mini-mills, also called specialty mills, which in 2014 numbered 113. In 1981, mini-mills produced an estimated 15% of US steel. [13] Since 2002, steel produced by electric arc furnace, the process used by the mini-mills, has produced more than half the steel made in the US.
Mesta Machinery was a leading industrial machinery manufacturer based in the Pittsburgh area town of West Homestead, Pennsylvania. It was founded in 1898 by George Mesta when he merged his machine shop with another. [2] Mesta "machines" can be found in factories throughout the world and as of 1984 had equipment in 500 steel mills. [3]
The company's steel was used in the construction of many of the nation's largest and most famed structures. Among major buildings, Bethlehem produced steel for 28 Liberty Street, the Empire State Building, Madison Square Garden, Rockefeller Center, and the Waldorf Astoria hotel in New York City and Merchandise Mart in Chicago.
Steel is an alloy composed of between 0.2 and 2.0 percent carbon, with the balance being iron. From prehistory through the creation of the blast furnace, iron was produced from iron ore as wrought iron, 99.82–100 percent Fe, and the process of making steel involved adding carbon to iron, usually in a serendipitous manner, in the forge, or via the cementation process.
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