LAUSR

Top blown O2 + CO2 mixed injection technology with a swirling oxygen lance nozzle, which supports a larger jet radial velocity than the conventional oxygen lance nozzle, improves the impact area of the jet and thus the process efficiency of converter smelting. In this study, the jet characteristics of a 90% O2 + 10% CO2 mixture injected through a full-scale four-hole swirl nozzle was simulated and the effects of preheating temperature and gas flow rate on the jet characteristics were analyzed. Increasing the preheating temperature and gas flow rate increases the axial velocity of the jet, the core section, and the mixing degree of multiple jets. At the same injection distance, increasing the preheating temperature of the mixture increases the impact strength and area of the jet. These results can be used to adjust the gas flow rate and preheating temperature of the mixed gases in large-scale smelting operations.