Thyssenkrupp Steel to upgrade slab sizing press

An upgrade of the power and electrical system with new cycloconverter and low-voltage drives will ensure higher availability and a future-proof spare parts supply. Tailormade cooling solution enhances safety for personnel and equipment.

Thyssenkrupp Steel has awarded Primetals a contract to modernize the slab sizing press at hot-strip mill No. 2 in Duisburg, Germany. The project includes a comprehensive upgrade of the electrical and drive systems, featuring a new cycloconverter for the main press motor, low-voltage multi-drive converters, and DC converters for the pinch rolls, gap adjustment, and roller table. Implementation and startup services are also part of the scope. According to Primetals, the modernization will ensure increased equipment availability and secure a future-proofed supply of spare parts. Startup is scheduled for the third quarter of 2026.
The drive system of Thyssenkrupp Steel’s slab sizing press is divided into two groups: a main drive powered by a cycloconverter, and several supporting drives for the pinch rolls, gap adjustment, and roller table. All converter technologies for these drives will be renewed while most existing transformers and motors will be retained, significantly reducing capital expenditure.
Primetals will also design a tailormade cooling solution for the drive room. Based on a closed-loop air-to-water system at the drive cabinets, this setup provides efficient cooling and improves overall energy efficiency. An arc fault protection system will be installed to quickly extinguish arc flashes, enhancing safety for both personnel and equipment.
Source: Primetals Technologies