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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 708 pages |
| ISBN: | 978-0-9879917-1-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
An Analysis Of Nitrogen Pick-Up Between Tapping From An Oxygen Converter And Secondary Refining.
Varadarajan Seshadri1; Carlos Antonio Da Silva2; Itavahn Alves da Silva3; Hadriel Goncalves da Silva 4; Aparecido Tsutomu Nakamura4; henrique silva4;1FEDERAL UNIVERSITY OF MINAS GERAIS, Belo Horizonte, Brazil; 2FEDRAL UNIVERSITY OF OURO PRETO ( UFOP), Oruo Preto, Brazil; 3DEPARTAMENTO DE ENGENHARIA METALúRGICA E DE MATERI, , Brazil; 4ARCELORMITTAL TUBARAO, Serrra, Brazil;
Type of Paper: Invite
Id Paper: 261
Topic: 5
Abstract:
Nitrogen pickup in steel melt can take place in different stages of steel making and this is important in respect of grades which have stringent standards in respect of Nitrogen content. In this work, Nitrogen pickup between tapping from Oxygen converter to steel delivery to secondary steelmaking stations has been analyzed on the basis of data from Arcelor Mittal-Tubarão steel plant situated in Vitoria , Brazil. A model for the entry of Nitrogen through the plume eye in the ladle during injection of Argon used for rinsing has been applied using data from the plant. Nitrogen pickup seems to be influenced by the steel grade, like steel for appliances, IF steels, API steels etc. Additions, especially aluminium used for deoxidation, have a strong influence on the absorption of Nitrogen particularly in the in the case of API steels . There is also Nitrogen pickup ,due to Argon gas injection in the ladle, through the plume eye . Ladle slag plays an important role acting as thermal and chemical insulator in this process. The results of the model based on incorporation of Nitrogen through plume eye together with the pickup from other sources have been analyzed and compared with the industrial data.