Press Releases
News & Press Releases

News & Press Releases

London, April 24, 2024

Primetals Technologies’ Modernization of Slab Sizing Press to Boost Reliability for Salzgitter Flachstahl

  • Primetals Technologies to upgrade power and electrical system at slab sizing press with new cycloconverter and low-voltage AC drives
  • Modernization will ensure increased availability and future-proofed supply of spare parts
  • Implementation scheduled for December 2024 

Salzgitter Flachstahl, a subsidiary of the Salzgitter Group, has recently tasked Primetals Technologies with a comprehensive upgrade of its power and electrical system for the slab sizing press in its hot-rolling mill in Salzgitter, Germany. Primetals Technologies won this order following the completion of a successful crop-shear project at the same mill. 

Increased Availability

The slab sizing press was designed to reduce pre-heated slabs in width, by up to 350 millimeters. The equipment’s drive technology is divided into two groups: the main drive, fed by a direct converter, and the supporting drivers, provided via DC-link converters featuring a common DC-link. This project will renew the converter technology for all the drives in both groups, and is aimed at increasing the availability of the production line while ensuring secured spare-part supply conditions for the power and electrical system.

The scope of supply encompasses a new cycloconverter for the main motor of the press, new low-voltage multi-drive DC-link converters for the pinch rolls and for gap adjustment, as well as implementation and startup services. The replacement of the drive systems will take place during planned standstill periods.

A Strong and Long-Lasting Partnership

Primetals Technologies and Salzgitter Flachstahl have collaborated on numerous projects over the last few decades, all the while building a strong and dependable relationship. As an example, Primetals Technologies recently improved the LD converter (BOF) process by executing a Level 2 automation upgrade, resulting in an optimization of lime quantities and an increased number of successful heats. Salzgitter Flachstahl is the largest subsidiary of the Salzgitter Group and produces hot-rolled strip, hot-rolled sheet, cold-rolled sheet, and surface-finished products at thicknesses from 0,4 to 25 millimeters and widths of up to 2,000 millimeters.

Salzgitter Flachstahl has invested in an automation upgrade from Primetals Technologies for a part of its hot-rolling line. Photo copyright: Salzgitter AG.

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 Group Company of Mitsubishi Heavy Industries, with around 7,000 employees worldwide. To learn more about Primetals Technologies, visit the company website