Air curtain mechanism of bottom blowing oxygen copper smelting furnace

In the oxygen copper bottom blow smelting process, due to the combined effect of spattering in the molten pool and furnace burden particles, the charging port is prone to clogging, resulting in production interruptions. For this reason, this study setup an air curtain device in the charging port and took a copper bottom-blowing melting furnace with an annual production capacity of 100,000 tons in a factory as the object of study and investigated the influence mechanism of the air curtain device on the spattering under the conditions of different operating parameters (liquid surface depth and bottom-blowing gas volume) by means of a numerical model. The results show that after adding the air curtain device, with the increase in the melt pool liquid level from 1550 to 2050 mm, the spattering height of the melt decreases by 0.073 m on average, the spattering height decreases by 16.29%, and the spattering peak value decreases by more than 60 mm. With the increase in bottom blowing gas volume from 1650 Nm3/h to 6600 Nm3/h, the height of melt spattering decreases by 0.083 m on average, the spattering height decreases by 16.47%, and the spattering peak decreases by more than 0.140 m. The spattering height decreases by 0.083 m on average. The air curtain device can effectively reduce the spray height of the melt.