OVERVIEW OF NON-METALLIC INCLUSIONS IN FERROALLOYS AND THEIR IMPACT ON STEEL QUALITY
Ferroalloys have become increasingly important due to their indispensable role in the steelmaking industry.With the significant increase in market demand for steel quality,impurities in ferroalloys directly affect steel quality,further highlighting the importance of ferroalloy quality.In order to better understand the changes of major trace elements and inclusions added to molten steel in ferroalloys and their behavior in molten steel,this article analyzes the application and development trends of ferroalloys,focusing on the influence of some trace elements and impurities in ferroalloys on the characteristics of inclusions in steel,and identifies potential harmful inclusions in different ferroalloys.Overall,inclusions in ferroalloys have the following effects on the cleanliness of steel:①MnO,MnS,and MnO-SiO2-MnS inclusions in ferromanganese and ferromanganese-silicon have a phased impact on the quality of steel;② The effect of large-sized SiO2 inclusions(200 μm)in ferrosilicon and ferromolybdenum on the cleanliness of steel is not yet clear.Before adding ferrosilicon,the influence of Al and Ca content needs to be considered.Finally,this article proposes suggestions for the future development of ferroalloys.
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