9th ECCC European Continuous Casting Conference – ECCC 2017

ArcelorMittal Tubarão (AMT) is located in the State of Espírito Santo, southeast of Brazil. AMT has been in operation since November of 1983, and its main products are steel slabs and hot rolled coils. By using continuous improvement in the production process, maintenance and the latest technologies and equipment, AMT is aiming to increase the production of liquid steel at its steelmaking plant in order to reach a stable production level of 7.5 million tons/year of slabs and coils. To achieve this objective, new equipment were installed such as one blast furnace, one BOF, one RH, one KR process and a new continuous casting machine with a nominal capacity of 3.0 million tons/year. Besides the installation of these equipment, some continuous casting improvements were performed. This paper describes the main features that have been contributed for the casting operational improvements, emphasizing the revamping of continuous casting #1, new procedures aiming prevention of alumina adhesion on submerged entry nozzle (SEN) and upper nozzle, actions adopted to reduce the frequency of breakouts, deployment of submerged entry nozzle quick change system, as well as the increase of SEN life, the decreasing in the frequency of sticker alarm and the increasing of segment life.