Method for producing HRB500E reinforcing steel bar by matching vanadium-containing converter slag with vanadium

The invention discloses a method for producing an HRB500E reinforcing steel bar by using vanadium-containing converter slag matched with vanadium. The method comprises the following steps: controlling the loading amount of a converter to be about 100t, and preparing vanadium-containing converter slag, silicomanganese alloy, ferrosilicon alloy and vanadium-nitrogen alloy in an alloy baking furnace; opening bottom blowing of a steel ladle and setting nitrogen strong blowing, adding a deoxidizing agent into the steel ladle during tapping to carry out pre-deoxidation, opening a fan-shaped valve of an alloy baking furnace when the molten steel is discharged to 1/5, and putting the vanadium-containing converter slag, a silicon-manganese alloy, a silicon-iron alloy and a vanadium-nitrogen alloy into the molten steel through an articulated chute; when the molten steel is discharged to 4/5, bottom blowing is adjusted to be soft blowing and kept, and aluminum particles and coke foam are added to the position, not impac