Anti-RH (Relative Humidity) resulfurization technology for ultralow-sulfur moderate-thickness plate steel in high-sulfur molten steel smelting

One kind of high sulfur steel smelting ultra low sulfur steel plate to prevent the return of sulfur RH process, are thick steel by smelting art. Routing of: hot metal desulfurization pretreatment - converter blowing - -RH ladle refining process - casting, at 0.005% -0.012% of the sulfur converter end, at the end of the ladle furnace through the slag, the sulfur content and oxidation of the steel and each alloy composition and precise temperature control, reduced material is added during the RH treatment of sulfur into the process and the RH resulfurization due to temperature and the slag, the sulfur balance caused by the oxidation of the steel caused by the reverse movement, the finished steel the sulfur content can be controlled ≤0.001%, to achieve a bulk stable production of ultra-low sulfur steel.