Primetals Technologies modernizes cycloconverter drive of finishing mill crop shear at Salzgitter Flachstahl

5 March 2021

Salzgitter Flachstahl GmbH has commissioned Primetals Technologies with the replacement of the existing cycloconverter drive system for the crop shear installed on the finishing mill of the Salzgitter (Germany) production site. The aim of the project is to maintain the availability of the finishing mill by replacing the obsolete cycloconverter drive with a new cycloconverter drive. When replacing the existing cycloconverter drive system, the customer's request is realized to build the new system switchable in parallel to the existing cycloconverter in order to ensure a risk-free replacement with short downtime. The project is scheduled to be completed in November 2021.

The scope of delivery of Primetals Technologies includes the complete electrical replacement of the cycloconverter. Further, the order includes the delivery of a new control room panel, the creation of additional visualization screens and diagnostic options, as well as the integration of the new drive system into the existing cutting sequence control of the finishing mill.

Salzgitter Flachstahl is the largest steel subsidiary in the Salzgitter Group. More than 5,500 employees produced around 4.3 million tons of crude steel in 2019. The main customers for the flat products are vehicle manufacturers and their suppliers, tube and large-diameter tube manufacturers, cold rolling mills and the construction industry. In an integrated steel mill, the company produces hot-rolled strip, strip steel, strip sheet, cold-rolled sheet and surface-finished products with a thickness between 0.4 and 25 mm and a width of up to 2,000 mm. The production program includes drawing, deep-drawing and special deep-drawing steels, structural and fine-grained steels, as well as high-strength and ultrahigh-strength steels.

Salzgitter Flachstahl finishing mill in Germany. Primetals Technologies modernizes the direct converter drive of the finishing mill crop shear. (Image courtesy Salzgitter Flachstahl GmbH)

Primetals Technologies, Limited, headquartered in London, United Kingdom, is a pioneer and world leader in the fields of engineering, plant building, and the provision of lifecycle services for the metals industry. The company offers a complete technology, product, and services portfolio that includes integrated electrics and automation, digitalization, and environmental solutions. This covers every step of the iron and steel production chain—from the raw materials to the finished product—and includes the latest rolling solutions for the nonferrous metals sector. Primetals Technologies is a joint venture of Mitsubishi Heavy Industries and partners, with around 7,000 employees worldwide. To learn more about Primetals Technologies, visit the company website