Evaluating slag–metal deoxidation equilibrium in secondary steelmaking
| Autor: | Antônio Carlos Sant’Anna da Silva, Viviane Lima Freitas da Silva, Erik de Aguiar Santos, Luciano da Silva Leitão, André Luiz Vasconcellos da Costa e Silva |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lcsh:TN1-997
Work (thermodynamics) Materials science 02 engineering and technology engineering.material 01 natural sciences Biomaterials chemistry.chemical_compound 0103 physical sciences lcsh:Mining engineering. Metallurgy Refining (metallurgy) 010302 applied physics Ladle business.industry Metallurgy Metals and Alloys Slag 021001 nanoscience & nanotechnology Steelmaking Surfaces Coatings and Films Flue-gas desulfurization chemistry visual_art Deoxidized steel Ceramics and Composites visual_art.visual_art_medium engineering Non-metallic inclusions 0210 nano-technology business |
| Zdroj: | Journal of Materials Research and Technology, Vol 8, Iss 4, Pp 3453-3458 (2019) |
| ISSN: | 2238-7854 |
| Popis: | Steel–slag reactions are important in steelmaking, in special in secondary steelmaking. Currently, desulfurization, deoxidation and inclusion removal are mostly performed during ladle refining. The extent to which these reactions proceed is governed by the initial state of the material reaching the ladle, the additions made to the ladle and by undesired interactions such as reoxidation and steel-refractory reactions. In this work, the extent to which equilibrium is approached for the different deoxidation reactions is Al-killed and Si–Mn deoxidized steel is evaluated using thermodynamics. These results are compared to measurements performed in industrial ladle furnaces. The comparisons make possible evaluating the efficiency of the deoxidation process. The results indicate that reoxidation by air caused by agitation probably play a key role on the ability to approach equilibrium, reaching low oxygen content in steel. It is also concluded that relatively long treatments with controlled agitation are needed to achieve steel–slag equilibrium. Keywords: Ladle metallurgy, Non-metallic inclusions, Reoxidation, Computational, Thermodynamics, Steel |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|