ArcelorMittal has recently contracted Primetals Technologies for the revamping of two LD converters (BOFs) at its steel plant in Jõao Monlevade, Brazil.
The order includes two new 135-ton converters, an upgrade of the primary dedusting systems, and complete electrics and automation packages.
The upgraded wet-type primary dedusting systems capture dust from the converters and send it to a water treatment plant. The resulting emissions will be significantly below the legal limit set by the Brazilian government, says Primetals. Additionally, the new solution will require much less maintenance than the equipment currently in use.
Primetals Technologies will supply vessels, trunnion rings, suspension systems, tilting drives, bearings, pedestals, and new off-gas cleaning systems for both new converters. A maintenance-free suspension system, Vaicon Link 2.0 keeps the vessel stable and makes thermal expansion in all directions possible. Vaicon Stopper, a slag retention system, minimizes the amount of slag that enters the ladle during tapping. This system ensures shorter production cycles and higher steel quality compared with conventional slag retention systems.
Primetals Technologies will also supply a complete electrics and automation package, including basic (Level 1) automation systems, motors, and drives. The start-up of the new equipment is scheduled for the first quarter of 2025.
With a history spanning close to 90 years, ArcelorMittal Monlevade produces wire rod for industrial applications such as steel wool and steel cord. The site is part of ArcelorMittal Brazil’s Long Steel division and has an annual capacity of 1.2Mt.