TPT November 2023

INDUSTRY

Cold rolling mill for rolling of ultra-thin strips FIVES, an international engineering group, has designed and supplied a cold rolling mill to enable the rolling of ultra thin strips for electrical steel, which are in high demand on the market. Cold rolling is a critical step as it is challenging to roll the strip down to minimum values without breaking it. A 20Hi cold rolling mill was proven to be the best available technology to allow steelmakers to achieve such targeted properties, especially in term of thickness and flatness. tension, advanced roll gap and strip lubrication for higher product quality (flatness and magnetic properties), special attention to fume extraction, better strip wiping efficiency and an innovative concept for flatness actuators.

The thinner the strip, the more efficient the electrical equipment, though the production of this material presents a real challenge for steelmakers as the process becomes more complex. It involves several stages, one of which is cold rolling. The latest developments on the DMS 20Hi EcoMill include increased rolling speed and strip tension

These technological features aim to reduce operating costs and increase the overall capacity of the mill, which is essential to stay ahead in the highly competitive steel market. The critical parts of the DMS 20Hi EcoMill are manufactured in industrial workshops in Europe, which guarantees high quality material and safety standards for steelmakers worldwide. Combined with Fives’ process expertise and customer support, this set of improvements enables the DMS 20Hi EcoMill to establish a new standard of performance that has never been reached before.

Fives designed its proprietary technology – DMS 20Hi EcoMill – which enables a strip to be rolled down to 0.1mm on the full width of 1,250mm. It represents a unique achievement in the cold rolling of electrical steel. The new rolling mill achieving 0.1mm rolling thickness was recently supplied to Xinyu, part of China’s Baowu Group. The mill is capable of producing 100,000 metric tons per year of high-quality NGO grades, which are mainly dedicated to high-performance electrical motors. The latest developments on the DMS 20Hi EcoMill include increased rolling speed and strip

Fives www.fivesgroup.com

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NOVEMBER 2023