- published: 03 Jan 2012
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A steel mill or steelworks is an industrial plant for the manufacture of steel.
Steel is an alloy of iron and carbon. It is produced in a two-stage process. First, iron ore is reduced or smelted with coke and limestone in a blast furnace, producing molten iron which is either cast into pig iron or carried to the next stage as molten iron. In the second stage, known as steelmaking, impurities such as sulfur, phosphorus, and excess carbon are removed and alloying elements such as manganese, nickel, chromium and vanadium are added to produce the exact steel required. In the late 19th Century and early 20th Century the world's largest steel mill was located in Barrow-in-Furness, UK. Today, the world's largest steel mill is in Gwangyang, South Korea.
Steel mills turn molten steel into blooms, ingots, slabs and sheet through casting, hot rolling and cold rolling.
An integrated steel mill has all the functions for primary steel production:
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 steelmaking 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.
Sir Ratan Naval Tata KBE (Gujarati: રતન નવલ ટાટા; born 28 December 1937) is an Indian businessman who became chairman (1991– ) of the Tata Group, a Mumbai-based conglomerate. He is a member of a prominent family of Indian industrialists and philanthropists (see Tata family).
Among many other honours accorded him during his career, Tata received the Padma Bhushan, one of India’s most distinguished civilian awards, in 2000 and Padma Vibhushan in 2008. He has also been ranked as India's most powerful CEO.
Ratan Tata was adopted to famous Tata , a prominent family belonging to the Parsi community. Ratan is the grandson of Tata group founder Jamsedji Tata. His childhood was troubled, with his parents separating in the mid-1940s when he was merely seven and his younger brother Jimmy was five years old. Their mother moved out and both Ratan and his brother were raised by their grandmother Lady Navajbai.
Tata started his schooling at Campion School and finished at Cathedral and John Connon School both in Bombay. Ratan Tata completed his B.S. in architecture with structural engineering from Cornell University in 1962, and the Advanced Management Program from Harvard Business School in 1975. He is a part of the Alpha Sigma Phi fraternity.