MANUFACTURE OF DEAD SOFT STEEL

摘要

PURPOSE:To manufacture a dead soft steel having a remarkably low carbon content by regulating the composition of a refractory for the wall of a vessel and the basicity of slag so as to reduce the erosion of the refractory. CONSTITUTION:When a dead soft steel is manufactured by heating and refining under reduced pressure, a refractory having 3-7wt% carbon content and >=50wt% MgO content is used as a refractory for the wall of an electric furnace and the wall of a vessel such as a ladle. The refining is carried out so as to regulate the basicity (CaO/SiO2) of slag to 1.5-10 and the MgO content to 5-25wt%.