Method for shortening refining time of SPHC steel

The invention discloses a method for shortening the refining time of SPHC steel. According to the method, good dynamic conditions in the converter steel tapping process are utilized, advanced slaggingmaterials are added to molten steel through an alloy chute before and after steel tapping, and the advanced slagging materials directly bear the impacts of steel tapping molten steel flow in the adding process, so that the molten steel in a steel ladle fully acts with the added slagging materials; and fast slagging of the steel tapping process is achieved, high-alkalinity ladle slag with certaindesulfuration capacity is made in advance, and the added ladle slag achieves a modifying and pre-deoxidizing effect on original slag in the steel ladle. After the molten steel enters an LF, re-slagging is not needed, the LF treatment time can be saved by 3-5 minutes, and the refining power consumption is reduced by 3-5 kilowatt/ton of steel; and the LF desulfuration efficiency is improved, and theeffect of removing occlude