The new flux of CaO-Al 2 O 3-MgO system was developed for the refining of low impurity and high quality steel from steel scrap or reduced iron by the combination of EAF-LF-RH. The practical tests of 12 heats using 110 ton scale EAF were carried out at 1873K. The chemical composition of final products was [mass ppm S]ϭ40-60, [mass ppm O]ϭ2-5 and [mass ppm N]ϭ50-70 without special troubles like the damage of refractory materials.
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