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22.10.2007 The Siemens Industrial Solutions and Services Group (I&S) has received an order
from Salzgitter Flachstahl GmbH to supply new main drives and the associated automatic
control technology for the company’s hot strip mill. The order value amounts to
approx. 29 million euros. The drive systems will be supplied, installed and
commissioned in several stages beginning in spring 2009.
The hot strip mill at Salzgitter Flachstahl GmbH: Siemens is supplying new
main drives and the associated automatic control technology for the finishing
line (photo: Salzgitter AG).Salzgitter Flachstahl is the largest steel
subsidiary in the Salzgitter Group. In 2006, almost 4,500 employees
produced about 4.6 million tons of steel. The most important customers
of the flat products are the steel trade, automobile manufacturers and
their suppliers, cold rolling mills, tube and large pipe manufacturers
and the construction industry. Within the company’s integrated iron and
steel works, the hot strip rolling mill produces from standard low carbon
to high-strength grades, carbon steels up to C75 and pipe steels up to X75.
The thickness of the hot strip ranges from 1.23 to 25mm at widths of 900
to 1,880mm.
In the course of the project, Siemens will replace the main drives of the
seven-stand finishing line; at present they are DC drives, but these will
be replaced by AC drives stage by stage. The new cylindrical-rotor
synchronous motors will be fed via Sinamics 150 DC-link converters with a
total output of about 100MW. The motors will be manufactured at Siemens
AG’s Dynamowerk Berlin.
The conversion will be carried out in a total of five stages so as to
keep disruptions to ongoing production to a minimum. The layout of the
motors was chosen so that the existing foundations could continue to
be used, thus avoiding costly construction work. Installation will
be taken care of by the Siemens Regional Company in Germany, in Hannover.
Further information about solutions for steelworks, rolling mills
and processing lines at: www.siemens.com/metals.
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