VOD Refining of Extra-low Carbon Welding Rod Steel

The EAF tap contents(%) (C 0.7~0.90; Mn,Si 0.20~0.30; Al 0.010~0.020)and tap temperature (1660~1680℃) are designed to supply sufficient thermal energy for VOD refining welding rod steel. The process of charging with 50% hot metal and oxidation method can effectively dilute trace elements(As,Cu,P,Cr,V) and the acid slag formed in the process of VOD refining is beneficial to the controlling of element contents (C,O,N,Al,Si,Mn). The welding rod steel with the process of EAF+VOD refining can meet the requirement of standard and the quality level is equal to that of the same kind abroad.