Smelting process for production of grade II hot-rolled reinforced bar

The invention relates to a smelting process for production of a grade II hot-rolled reinforced bar, which belongs to the technical field of metallurgy. A technical scheme provided by the invention is as follows: through usage of a vanadium extraction-steelmaking duplex process, the grade II hot-rolled reinforced bar is produced by using molten iron containing vanadium and silicon-manganese alloy as main alloying raw materials; according to the process, production cost of the bar is reduced by increasing the content of V in the bar and properly reducing elements consisting of Mn and Si in the grade II hot-rolled reinforced bar on the base of ensuring performances of the grade II hot-rolled reinforced bar; the elements consisting of Mn and Si are mainly from the silicon-manganese alloy, the element C is mainly from C at a steelmaking terminal point and C brought by the molten iron containing vanadium, and the element V is mainly from residual vanadium at the steelmaking terminal point, V brought by the molten iron containing vanadium and V of V2O5 in final slag of a reduction converter. With the process provided by the invention, performances of the grade II hot-rolled reinforced bar are guaranteed, production cost of the grade II hot-rolled reinforced bar is reduced, a variety of performances of the grade II hot-rolled reinforced bar are guaranteed without passing through water, and quality of the bar is ensured.