A US steelmaker signed a contract with Primetals Technologies for the engineering, supply and commissioning of a 68-ton EAF Ultimate electric arc furnace (EAF) integrated with Active Power Feeder power supply technology.
The order also includes a primary dedusting system, a material handling system, auxiliary equipment, and a complete Level 1 and Level 2 automation system. Commissioning is planned for the end of 2026.
Annual production capacity of 0.75 million tons
The EAF Ultimate is part of Primetals Technologies' latest generation of electric steelmaking equipment characterized by short tapping times, fully automatic operation, and advanced control systems. Furthermore, the EAF Ultimate features a modern eccentric bottom tapping (EBT) system, eliminating the problem of slag escaping from the furnace during tapping, resulting in improved final steel quality.
The new equipment is replacing a two spout-tapping electric arc furnace and is capable of producing 0.75 million tons annually. The steelmaker specializes in medium carbon, high alloy, and free-cutting steel grades.
Steel producer to be the first to power an EAF using AC-AC conversion
The breakthrough power supply solution enabled the company to become the first steelmaker to power an EAF using direct AC-AC conversion at medium voltage level using Modular Multilevel Matrix converter (M3C) technology, marking a significant improvement in energy efficiency.
The Active Power Feeder solution provides fast dynamic control, ensuring efficient energy input to the EAF while allowing to minimize the disturbance to the grid.
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