Pilot Plant Melting of Steel Using Ferro-Silico-Aluminum at KSP Steel

Resumo

Results are provided for pilot plant testing of steel melting using ferro-silico-aluminum (FSA) at KSP Steel (Kazakhstan). These tests show that the use of FSA during steel extra-furnace treatment has a number of technological advantages, one of which is material multifunctionality. An economic effect is achieved as a result of a reduction and exclusion of some expensive materials from standard material consumption, such as feldspar, and silicon carbide. FSA has good deoxidation capacity, and having aluminum metal within its composition makes it possible to reduce a considerable amount of alloying element oxides. Using FSA in test melts there is a reduction in Fe_tot content by 0.37%, MnO by 1.01%, and SiO2 by 1.24%, which provides a reduction in slag oxidizing capacity, and also leads to an increase in its basicity, as a result of which there is a reduction in slag belt lining wear and an increase in ladle life.