Numerical simulation of negative pressure control in 30MVA Si-Mn submerged arc furnace

In order to clarify the problem of the furnace negative pressure control, a three dimensional k-ε model was set up to simulate the 30MVA silicon-manganese submerged arc furnace. The Fluent software was used to simulate the submerged arc furnace air leakage coefficient under different outlet pressures, gap widths, and loads. The results show that furnace pressure drop increases with the increase of gap width and load. When the outlet pressure is constant, the air leakage coefficient decreases as the load increases. And when the load is constant, the air leakage coefficient increases as the outlet pressure decreases. The range of negative pressure control of the submerged arc furnace outlet pressure is obtained under different loads and gap widths. When the load is 66.7%, the gap width is less than 1.0 cm, and the outlet pressure is proposed to maintain within the range of -15 Pa to -10 Pa. When the load is 100.0%, the gap width is less than 1.0 cm, and the outlet pressure is proposed to maintain within the range of -25 Pa to -20 Pa. When the load is 133.3%, the gap width is less than 1.5 cm, and the outlet pressure is proposed to maintain within the range of -45 Pa to -35 Pa.