Experimental Study of Bottom Blown Oxygen Copper Smelting Process for Water Model

By constructing an experimental model for studying a converter with bottom-blown oxygen in matte-smelting process, the effects of main factors such as the gas velocity, the angle of inclination and diameters of nozzles on the mean bubble diameter and gas holdup were investigated. The results showed that when a nozzle with a larger diameter is used, the mean bubble diameter increases, and splashing accompanied with air entrapment becomes stronger. Increasing the inclination angle of the nozzles weakens the splashing in the bath and decreases the gas holdup. A larger gas velocity has a better ability of dispersion and disintegration of bubbles, but the splashing becomes too strong. Compared to the single-nozzle, the indicators of the double-nozzles are better, and its splashing is weaker. When the angle between two nozzles is 44 degrees, the gas holdup reaches the maximum, which is about 9%.