Abstract
The article discusses the causes of formation of oxide non-metallic inclusions (ONI) during the release of carbon semi-finished product from the oxygen converter unit and their impact on the quality of the metal. It is known that the main sources of oxygen in steel are residual oxygen after blowing and atmospheric oxygen with which the metal stream is saturated during the release into the steel ladle. Based on theoretical analysis and numerical modeling using ANSYS Fluent, the efficiency of feeding deoxidizing materials directly under the metal stream is substantiated. This approach ensures better mixing, more complete assimilation of reagents and reduced formation of inclusions, compared to traditional feeding to the periphery of the ladle. Recommendations are presented for modernizing the scheme for introducing bulk materials in order to improve the efficiency of the deoxidation operation and reduce the cost of steel production.