Study and evaluation of sulfur exposure in the steel melt during the converter heat with highly desulfurized pig iron - B. V. Dvoskin; V. G. Kisljakov; A. V. Ostapenko; A. S. Vergun; A. F. Shevchenko; I. A. Manachin; A. L. Rudenko; V. P. Petrusha (Fundamental and applied problems of ferrous metallurgy, 2017)