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Siemens: Order from the Steel Authority of India

By Gerald Ondrey |

Siemens VAI Metals Technologies (Linz, Austria, www.siemens.com/metals) has received an order from the Steel Authority of India (SAIL) to supply an RH vacuum degassing plant to the Rourkela Steel Works in the state of Orissa. The new plant will allow high-quality steel grades up to cold-rolled non-oriented types to be produced. The order is worth a total of some ten million euros. The RH plant is scheduled to come into operation by the middle of 2012. The main functions of the RH degassing plant in the Rourkela Steel Works are the removal of hydrogen, forced decarburization and the chemical heating of the liquid steel. The liquid steel is treated under vacuum conditions with argon as lift gas for circulation of steel. Twenty-four heats can be treated per day, which amounts to a production capacity of about 1-million ton/yr of liquid steel. The Siemens RH plant has a capacity of 150 tons, and is designed as a Mono-block design vessel with welded snorkel tubes. The RH-vessel is raised and lowered by a winch system. The scope of supply includes a five-stage vacuum pump, an alloying system, a T-COB (Combined Oxygen Blowing) lance for producing low-carbon types of steel grades, and complete level II process automation. The pressure…
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