Abstract
Desulfurization of low-silicon steels at the ladle furnace is a topical issue. The difficulty of the desulfurization process for these grades is due to the fact that after the metal is deoxidized with aluminum wire rod, the oxidation of the slag remains high as before, which in turn interferes with the desulfurization process. And with further deoxidation, a glassy slag is obtained, which also negatively affects the process. The article proposes to improve the technology of desulfurization of low-silicon steels in the conditions of the oxygen-converter shop of the Public Joint Stock Company "Magnitogorsk Metallurgical Plant". It was confirmed that the success of steel desulfurization directly depends on the degree of slag deoxidation, which can be visually assessed by the quality of the slag surface. It is also necessary to rationally distribute the supply of lime throughout the processing time to maintain the fluidity of the slag. To limit the growth of silicon content in steel, it is necessary to assess the presence of converter slag in the steel-pouring ladle at the initial stage of processing.
Keywords
Desulfurization, low-silicon steels, ladle furnace unit, “white” slag.