Proceedings of the Seminar on Steelmaking, Casting and Non-Ferrous Metallurgy

Title

CONVERTER DESIGN IMPROVEMENTS AND UPGRADES FOR LONGEST POSSIBLE BOF LIFE TIME

Authorship

Engel, Edo; Staudinger, Günther; Skorianz, Michael; Oliveira, Uazir Bezerra de

Engel, Edo

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Staudinger, Günther

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Skorianz, Michael

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Oliveira, Uazir Bezerra de

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DOI

10.5151/2594-5300-33399

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Abstract

In 2011 Danieli Linz has been founded and entered as newcomer the Converter Steelmaking market. Since this time 5 BOF References (from 80t up to 350t capacity) are in operation, a 300t BOF is currently in manufacturing status and another 180t BOF is in engineering phases. In July 2018 Danieli Linz Technology was fully integrated into the well-known Danieli Corus group, located in Ijmuiden (Netherlands). This new set-up creates excellent opportunities to use synergies and combine know how from both disciplines, iron- and steelmaking to further develop technologies and products in these fields. On the BOF market, there is more and more the demand to provide complete system responsibility. Which means optimizing converter- and refractory-technologies with the aim to increase their life-times in parallel as a system. This is a new challenge for all parties involved (operation of steel plant, supplier for converter and refractory). Under this scenario Danieli Corus can offer important features and improvements to the market: > Maximum increase of converter size respectively inner reaction volume while leaving the main dimensions of the existing plant unchanged. > The suspension system has to be designed in a manner that it is not limiting the life time of the converter. In this regards the well-known vertical lamella elements have been further improved. For the horizontal loads, Danieli developed and patented a new suspension element, which is based on flat lamella plates which compensate the thermal expansion of the vessel by elastic deformation. > To increase the life time of the vessel shell, Danieli Corus applies in a recent project the features of high creep resistance converter shell material, converter air- and water cooling. > For monitoring the temperature, Danieli Corus further developed the second generation of the temperature monitoring system Q-TEMP 2.0. This is a direct outcome of the above mentioned synergies. > Another feature is the Danieli Conditioning Monitoring System (DCMS), which actually will be installed in a converter tilting drive. This system is giving online feedback of the actual condition of the gear components and defines the optimum timing for overhauling, repair or exchange of components or parts.

Keywords

Steelmaking Converter, BOF-Converter, Suspension system, Lifetime, Converter Cooling System