Optimization Of LF Refining Slag Desulfurization Capacity

LF ladle refining furnace smelting high-quality steel used in the refining equipment,which by arc heating, causing reduction refining slag and bottom argon stirring methodsfor rapid deoxidation, desulfurization, uniform steel temperature, composition andremoving the liquid steel harmful inclusions provided an effective means of refining,smelting steel in pure plays a significant role. LF refining furnace to optimize theprocess of convergence between the converter and continuous casting and speed up thepace of production, With the increasing demand for clean steel, with LF furnace ofmolten steel desulfurization process operation has become a widely used method formost mills so to optimize refining slag and various technological factors of productionand research has become the focus of the content.Papers with Six Sigma tools Minitab software, a domestic production of low sulfursteel210tLF weathering steel refining furnace desulfurization process collected177setsof data were calculated and studied, and LF furnace desulfurization plant to make acomprehensive analysis and evaluation, focusing on the impact of refining slagcomposition, temperature, bottom blowing argon flow and other process parameters andprocess systems for LF furnace desulfurization process. Studies have shown that: LFrefining furnace from inbound to outbound, the amount of lime added in1200to1400kg/furnace slag SiO2content between6to8%Al2O3slag content of between20to26%desulfurization better; with the end temperature, the increase in theconsumption of argon gas, argon gas can be increased significantly large desulfurizationrate, an increase in the total amount of slag, LF desulfurization rate also increases; LFfurnace slag desulfurization rate and unstable oxides (FeO and MnO) is closely relatedto the total content, the lower the unstable oxide slag desulfurization more favorablereaction, should be controlled at the lower range, with particular attention to under slag tapping process; slag TiO2, refining temperature, slag and other factors also have animpact on the desulfurization process. Research results have been applied in the plant,to stabilize the desulfurization process has achieved some results.