The invention discloses a method for assisting the
steelmaking and
slag-making by utilizing
tailings in a duplex process and a semisteel
steelmaking method. The method comprises the following steps: uniformly mixing the
steelmaking tailings with a
silicon-containing
slag-making material to obtain mixed
slag; adding the mixed slag into a steel
ladle along the semisteel flow when the semisteel is discharged, and stirring the mixed slag by blowing air from the bottom so as to pre-smelt the mixed slag in the steel
ladle; pouring the pre-molten mixed slag into a steelmaking converter to be processed in semisteel steelmaking after the semisteel discharging is ended. According to the method, the converter steelmaking slag is pre-slagged, so that the problem that the successful slag-making is influenced by the frequent fluctuation of the temperature of steel liquid in the converter caused by adding a great amount of different slag into the converter can be avoided, and the end-point control is stabilized. The steelmaking
tailings are waste tailings, the cost is low, after being molten, the tailings directly enter the
metal liquid through the steelmaking
chemical reaction, so that the
metal yield can be improved, the
energy consumption can be saved, and the production cost can be effectively reduced. The material covers the surface of the liquid after being molten, so that the
smoke problem in the steelmaking process can be solved, and the environment and the
employee health can be protected.