Abstract：The variation of sulfide capacity with composition in the slag system CaOSiO2Al2O3MgO(10%) at 1873 K was calculated by using the optical basicity. The high grade pipeline steel refining process arts to control superlow sulphide are analysised and the relationship figure of sulphide capacity, (%S), ［%O］ and ［%S］ is drawn. A LFVD refining process was analysised. During the process of LF1(the primary state of LF process), LF2(the end of LF process) and VD, the (MnO+FeO）content of topslag are 11.92%, 2.00% and 1.1%; the basicity(R) of topslag are 3.195, 6.25 and 7.6; The M number (R/Al2O3) of topslag are 0.09, 0.17 and 0.18; the sulfide capacity(CS′) of topslag are 0.01, 0.022 and 0.023. And the ［%S］ of steel are 80×10-6 during LF1, (2030)×10-6 during LF2, and below 20×10-6 during VD, which is consistented with the calculating result.
李太全;包燕平;吴华杰;刘建华. 高级别管线钢超低硫控制研究[J]. 钢铁, 2009, 44(5): 35-0.
LI Taiquan;BAO Yanping;WU Huajie;LIU Jianhua. Controlling of SuperLow Sulfide of High Grade Pipeline Steel. Iron and Steel, 2009, 44(5): 35-0.
2009, Vol. 44 
