Sustainable Mining and Metallurgy

The three-dimensional simulation model of flue gas fluid in Ausmelt furnace flue was established by finite element simulation to study the flow of flue gas in the flue. The simulation model was compared with the actual coking situation of the flue during the overhaul of the Ausmelt furnace. The comparison results showed that the flue gas velocity and flue gas temperature of the three-dimensional simulation were consistent with the flue coking, so the simulation model was reliable. According to the simulation results and fluid mechanics principle, the left flue, the horizontal flue and the lower ash hopper were optimized, and the simulation prediction was carried out again. The results showed that the negative pressure of flue gas was basically unchanged, and the maximum flow velocity and outlet flow velocity of flue gas increased by 35.7% and 115.7%, respectively. The central flue gas temperature was still above 1000℃, and the outlet flue gas temperature was increased to more than 2.5 times. Therefore, after flue optimization, the coking problem would be greatly improved, but there would be more faults in the subsequent electrostatic precipitator system. It was necessary to adjust the subsequent process parameters to cooperate with the optimization to achieve the desired effect.