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Sellan R.,Danieli Centra Met | Rinaldi M.,Danieli Centra Met | Coughlan R.,Danieli Automation
Steel Times International | Year: 2011

Danieli Centro Met and Danieli Automation have designed a new combined Ladle Furnace - Vacuum Degasser (LF-VD) plant for SSAB Oxelösund, equipped with twin tanks on movable cars to maximize productivity. The plant is meeting the tight product quality requirements and has a new-generation, thermodynamics based metallurgical model to ensure the required end point precision. A heat starts in the LF-VD when the ladle is placed into a tank car, and that it only stops when this ladle is taken out of it. The L3 provides the time target for when a given heat needs to leave the LF-VD for the caster, and also the temperature at which it should do so. In the production system, the messages exchanged between the various L2 processes themselves, and also between the L2 and the L1 and L3 interfaces, are recorded.

Wilhelm U.,Danieli Centra Met | Fabbro M.,Danieli Centra Met
MPT Metallurgical Plant and Technology International | Year: 2014

Ferriere Nord, the parent company of the Pittini group, decided to replace the existing electric arc furnace (EAF) in order to improve the melting process and optimize maintenance operations. The company ordered a new DanArc EAF from Danieli Centro Met. After the engineering phase, both teams worked closely together, monitoring the overall project progress and the quality of each component. EAF comprises a total liquid steel capacity of 150 t. The furnace is powered by a 100/120 MVA transformer and fueled by an ultra-high power chemical energy package. Because of the kinematics of the unit, the cables can be shorter; this reduces total reactance and increases the power input. The electrode arms are in a coplanar arrangement, which offers various advantages. All cable connections are on the same plane, and can be accessed via the service platform on the transformer side. The entire project was developed in 3D to check and solve all possible interferences with the existing infrastructure, to have the right piping route for fast pipe laying preparation, with benefits in terms of shorter erection time.

Adachi T.,Tokyo Steel | Sellan R.,Danieli Centra Met
MPT Metallurgical Plant and Technology International | Year: 2012

A twin DC ultra-high power EAF equipped with the Constee® system was successfully started up in June 2010 at Tokyo Steel's Tahara Plant. The jumbo size EAF is the largest ever built and designed to achieve a production of 360 t/h. This EAF provides excellent efficiency as a result of low operating costs due to low manpower and low energy demands. Maximum flexibility in power regulation is reached by individual control of current conduction and distribution between each of the four anodes. To reduce the power-off time, an automatic sampling device is provided to have continuous information on the bath temperature and chemical composition. Danieli has provided the Motank robot. It has a sturdy design and makes it possible to keep the slag door clean during power- on time, safely and consistently.

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