LF refining and desulfurization method of anti-acid pipeline steel

The invention discloses a LF refining and desulfurization method of anti-acid pipeline steel. The method comprises the following steps: after deoxidation completion of a converter, molten steel and top slag, argon is continuously introduced; lime, fluorite and aluminous deoxidation agents are fed to enable the component mass ratios of the top slag to meet the following requirements: (55+-2)% of CaO, (25+-2)% of Al2O3, (8+-2)% of SiO2, (5+-2)% of MgO, and (4+-2)% of CaF2; in the converter tapping process, the argon blowing operation at the bottom of a ladle is adopted in the whole process; andfinally, the temperature measurement and the tapping are performed to obtain the anti-acid pipeline steel. In order to guarantee that finished products have excellent characteristic of H2S corrosion resistance, the molten steel meets the requirement of ultralow sulfur content. In the steel refining process, the converter controls the tapping stop slag; the quick slagging is realized through refining; specific refining sla