World largest straightener at ArcelorMittal Differdange

Posted on 29 August 2016

Danieli to supply a major finishing-end upgrade to improve safety, enhance product quality, product yield and productivity.

ArcelorMittal has ordered to Danieli new finishing equipment for its jumbo beam mill in Differdange.

The core of the project consists in the installation of a new 9-roll straightener to replace the manual straightening operations which are currently accomplished by using two gag presses.

With a 2,500-cm3 modulus, the new straightener for ArcelorMittal will be the largest ever built.
The double-support design of the new Danieli heavy-duty machine will allow both web and flange-tip straightening.Automatic roll adjustment and automatic roll change are fully hydraulic; the change of all 9 straightening rolls will take less than 25 minutes.

The extension of the existing cooling bed, a new cold disc saw and related handling equipment including an automatic system to transfer the rolls from the production line to a new roll setup and preparation area, will complete the plant upgrade.
All electrical and automation systems will be provided by Danieli Automation.

Plant start-up is scheduled for the beginning of 2018.

More information about the plant.
ArcelorMittal Differdange mill was already upgraded by Danieli in 2007 with the installation of intermediate reversing mill stands featuring Hydraulic Gauge Control.Differdange mill product range includes parallel-flange beams and columns with up to 1,138-mm web width, up to 476-mm flange height, up to 140-mm flange thickness and up to 1,377-kg/m linear weight, in high-strength steel grades, such as ASTM A913 grades 70 (485 MPa), 65 (450 MPa) and 50 (345 MPa) or EN 10025 grade S460M.
Such Jumbo beams have been used in extreme engineering projects around the world, including the Freedom Tower in New York, the Shanghai World Trade Center, and the upper part of the Burj Khalifa in Dubai.


Source: Danieli News and Events

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