Experience of Using Alumina Aluminum-Containing Flux During Treatment of “Aluminum-Free” Steels1

Abstract

Among the range of many products is so-called “aluminum-free” steel within which the aluminum content is limited to thousandths of a percent. Normally during extra-furnace treatment of these steels it is prohibited to use material containing metallic or oxidized aluminum. Results are given in this article for industrial experiments pointing to the possibility of using a dilute alumina material maintaining a low aluminum content in steel and forming a phase in slag favorable from the point of view of using solidified slag in building.