New Danieli Slab Casters in Operation in ARCELORMITTAL Dunkerque and Fos sur Mer Sites (France)

摘要

The world largest steel produced, entered since 2004 a comprehensive renovation program aiming at the complete rebuilt of its largest slab casting complexes in EUROPE located in Dunkerque (Northern France) and Fos sur Mer (Southern France). Danieli has been identified as its technological partner for this renovation plan, one of the largest projects ever established, involving the reconstruction of slab casters covering an overall productivity of almost 10 million tons per year of slabs.The overall program involves the complete rebuilt of 4 two strand slab casters, 3 in Dunkerque and one in Fos-sur-Mer in a step by step bases: already 3 casters have successfully put into operation, while the last one is expected to be started up at the beginning of 2009. The goal of this challenging program is to enhance slab quality e improve production cost competitiveness, thanks to the complete redesign of the casters, maintenance free oriented, and the application state of the art technologies.The Dankerque site has been confirmed as one of the most reliable and sound, by achieving in the shortest time the full production and by reaching step-by-step the quality target of the final product. This was accomplished for the CC23 and it is on going for the CC22.The design approach for the CC1 in Fos sur Mer has been done according to the modern engineering techniques. According to the modern FMDSE analysis the technical risks have been identified in advance and the design has been improved directly during the engineering. RAMS analysis (Reliability-Availability-Maintainability-Safety) has been carried out all along the engineering stage, resulting in a design accomplishing a total calculated availability for the new caster of 98.9%.This paper describes the main features of the new casters as well as the main results already reached by the casters in operation.