Simulation of Flow Field of Oxygen Lance Gas Jet Utilized for 50 t Converter Original Research Article

Based on the operating conditions of oxygen lance utilized for a 50 t converter in Tangsteel, gas jet flow fields of three types of oxygen lances were simulated by FLUENT software. The influence of lance configuration and lance level on penetrating area was studied through cold model experiment. The results showed that the gas flow velocities of four-hole, variable angle four-hole and five-hole oxygen lances declined rapidly with an increase in gas jet length within 1 m, 1 m and 0.8 m, respectively. Besides, the multi gas streams sprayed from these three lances should be syncretized at 1.6 m, 1.7 m and 1.4 m, respectively. At the highest lance level, the effective penetrating area of these three lances could be 0.255 m2, 0.385 m2 and 0.0907 m2, respectively. It was suggested that the effective penetrating area of variable angle four-hole oxygen lance was the biggest, while that of five-hole oxygen lance was the least. The validity of numerical simulation results was proved through cold model experiment. The lance level was suggested to be controlled in the range of 1 – 1.6 m, 1 – 1.7 m and 0.8 – 1.4 m for the four-hole, variable angle four-hole and five-hole oxygen lances, respectively.