Production method of ultralow-carbon low-aluminum structural molten steel

The invention discloses a production method of ultralow-carbon low-aluminum structural molten steel, and mainly solves the technical problems of low chemical component control precision and high production cost in the existing production process of the ultralow-carbon low-aluminum structural molten steel. According to the technical scheme, the production method of the ultralow-carbon low-aluminum structural molten steel comprises the following steps that (1) molten iron is desulfurized; (2) smelting is achieved by adopting a top-bottom combined blowing converter; a converter smelting end point is controlled, and w [C] and temperature in the molten steel at a converter blowing end point are detected; and tapping is achieved immediately after the converter blowing is finished; (3) the molten steel in a steel ladle is transported to an argon blowing station to regulate and control the temperature of the molten steel; and (4) the molten steel in the steel ladle is conveyed to an RH furnace for refining treatment,