Oxygen distribution between phases during ladle processing of aluminum killed bof steels

The modern state of secondary metallurgy is characterized by the sustainable development technologies that ensure high metal quality reducing number non-metallic inclusions, which closely related to oxygen content in steel after smelting. Therefore, issues regularities distribution between phases at stage, BOF - CCM. Purpose. aim research was determine conditions redistribution dissolved depending on stages processing, degree approach deoxidation processes thermodynamic equilibrium. Methodology. Research carried out industrial scale. Steel grades 34Cr and 36CrB were smelted 170-t capacity. Processing crude a LF unit with further vacuum degassing wi thout it transfer At each stage treatment, slag samples taken using an automatic sampler chemical composition, temperature. Oxygen monitored "Celox" analyzer. Findings. carried-out studies showed before end processing ladle, possible detect individual reoxidation caused unwanted ingress from air ladle oxides. Accor ding calculations, second half during casting, there slight aluminum due decrease Even if this time exchange reaction slag, small amount Mn Si recovered while its composition practically constant throughout period metallurgical reactions proceed region Originality. It has been determined activity varies unevenly over decreases 3 ppm treatment ladle. While case Fe – a[O] Al system near calculated values Practical value. use obtained makes obtain specified for studied assortment predict burning deoxidizers alloying elements, ensuring reliability obtaining required purity. Key words: reoxidation, deoxidation, activity, metal, inclusion After blowing converter, range 1000-1500 [1-3]. tapping vessel teeming reduced order provide high-quality continuously cast billets purity steel. reaches necessary temperature composition. Important theory practice are patterns metallurgy, directly under production conditions. This determines removal efficiency harmful impurities, inclusions gases advisable compare measured contents equilibrium states, can be easily achievable practice, their calculation scientists.