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Last of three LD (BOF) converters from Primetals starts up at SSAB

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Autor: Redaktion

Datum: 24. Okt. 2016

With almost unchanged space requirements, the new converters have a larger reaction volume. The maintenance-free Vaicon Link 2.0, which will be used as the converter suspension, minimizes stress caused by heat-induced deformation and has a longer useful life. A blowing lance tip geometry adjusted to the new converter geometry, bottom stirring and a slag stopper improve the metallurgical properties of the steel produced. A new refractory concept will ensure long converter lining campaign.
SSAB Europe Oy is part of the SSAB group, a leading producer on the global market for Advanced High Strength Steels (AHSS) and Quenched & Tempered Steels (Q&T), strip, plate and tubular products, as well as construction solutions. The group has an annual steel production capacity of 8.8 million metric t of steel and operates production plants in Sweden, Finland and the USA. The integrated steel mill in Raahe is the largest production facility of its kind in the Nordic countries.
  The existing converters in the Raahe factory each have a tapping weight of 125 metric t. Primetals Technologies is replacing them with three converters featuring a detachable bottom and a bottom stirring system. The converter has an optimized geometry, which enables a larger reaction volume as well as a new concept for the refractory lining which has a longer useful life. The Primetals Technologies scope includes engineering of the converter vessels, trunnion rings and the Vaicon Link 2.0 maintenance-free suspension systems. The converters feature the Vaicon Stopper to minimize slag transfer on tapping. The tip of the blowing lance is adapted to the new converter geometry, which improves the blowing process and therefore the metallurgical properties of the steel produced. Primetals Technologies is also responsible for monitoring the pre-assembly and installation work as well as for commissioning.

(Source: Primetals Technologies)