Abstract:The combustion system of rotary anode furnace for crude copper refining was numerically simulated by CFD technology. Based on the results of the simulation calculations and combined with plant production situations, an improved idea is provided for controlling nitrogen oxides in the flue gas of the rotary anode furnace. The simulation calculations reveal that the nitrogen source introduced by primary combustion air is the main factor to the generation of nitrogen oxides in the rotary anode furnace. Reducing high-temperature zones and controlling the introduction of nitrogen sources can effectively control the nitrogen oxides content in the flue gas. Additionally, both the simulation and control practices indicate that the flow rate of the flame gas inside the furnace will increase the air leakage at the furnace mouth due to the entrainment effect, so as to increase the nitrogen oxides in the flue gas, and the return of the flame gas in the furnace can reduce the gas flow rate, so as to reduce the generation of nitrogen oxides through reducing air leakage.