Quantitative determination of slag non-metallic inclusions in 10UA steel by means of tracer technique

During steel melting in a converter with oxygen purging some part of slag gets mixed with the metal. The dispersed slag has not enough time to come to the surface before the ingot is crystallized. Thus the steel turns out to be contaminated with slag non-metallic inclusions. A study has been undertaken with the purpose of quantitative determination of the slag inclusions in 10UA steel. Tracer technique has been employed for the measurements with Y-90 as the indicator. According to the obtained results the slag inclusions content determined via the average slag activity of each investigated melting proved to be 10-4%