Gerdau S.A., Brazil, has awarded a contract to Siemens VAI Metals Technologies to revamp the bar mill at its Mogi das Cruzes location for the production of flat bar.
The bar mill’s intermediate train, finishing train and cooling bed will be revamped as part of the project. Siemens’ scope of supply includes the mechanical equipment, mechatronical packages, and the complete electrical and automation systems.
Gerdau’s plant in Mogi das Cruzes, state of São Paulo, specializes in producing long rolled products for the construction industry. The bar mill has an annual capacity of around 260,000 tonnes. After completion of the revamp, the mill will be capable of rolling flat bar with widths between 50 and 106.6 millimeters and thicknesses from 5.4 to 51 millimeters.
Siemens will equip the intermediate/finishing train with five new Red Ring stands in HVHVH configuration, an automatic repeater, two crop shears, and new roller tables. A dividing shear will also be installed in the entry section of the cooling bed. In addition, the cooling bed will be fitted with devices for handling programmable stacks of the rolled flat bar; this upgrade will enable the cooling process to be slowed to meet specific time targets and precisely set the metallurgical properties of the steel bar..
Siemens will also supply the basic automation and Siroll mechatronics packages for control of the rolling stands and the shears. The scope of supply will also include electrical systems such as medium-voltage switchgear, low-voltage distribution, transformers, as well as motors for the rolling line drives, a motor control center, and an uninterruptible power supply.
The upgraded plant is scheduled to commence production in early 2013.
The Siemens Industry Sector (Erlangen, Germany) is a leading international supplier of innovative and environmentally friendly products and solutions for industrial customers. With a global workforce of more than 100,000 employees, the Industry Sector comprises the Divisions Industry Automation, Drive Technologies and Customer Services as well as the Business Unit Metals Technologies.
The Metals Technologies Business Unit (Linz, Austria), part of the Siemens Industry Sector, is one of the world’s leading suppliers of plant construction and engineering in the iron and steel industry as well as in the flat rolling segment of the aluminum industry. The Business Unit offers a comprehensive product and service portfolio for metallurgical plants and equipment as well as integrated automation and environmental solutions covering the entire lifecycle of plants.