The invention relates to a
molten steel smelting technology for preventing
nozzle clogging during
sulfur-containing
aluminium-containing steel pouring process. The
molten steel smelting technology comprises the steps of converter or electric furnace
steelmaking, LF steel
ladle refining, VD or RH vacuum refining, and continuous
steel casting. According to the
molten steel smelting technology, molten iron without desulfuration is directly supplied to a converter or an electric furnace for
steelmaking, and
iron sulfide powder is added into
slag in the later period of LF steel
ladle refining, so that the content of
sulfur elements in the
slag is increased, the reaction between the molten steel and the
slag is inhibited during the vacuum treatment process, the loss amount of S elements in the molten steel is decreased, Al2O3 inclusions and CaS inclusions which are liable to cause
nozzle clogging are reduced, the problem of
nozzle clogging can be eliminated, the production is guaranteed to be smoothly carried out, and the production cost is reduced.