Abstract:The continuous multiple-lance top-blowing process has attracted much attention in metallurgical industry for its advantages of low pollutant gas emission, long service life, and high continuity. With industrial metallurgical furnace as the research object, numerical simulation of gas-slag-copper matte multiphase mixed flow in the continuous multiple-lance top-blowing furnace was carried out by means of computational fluid dynamics. The effects of single-row and staggered arrangement of multiple lances on the flow field, turbulent kinetic energy and gas holdup in the furnace were explored. The results show that compared with the two-row staggered lance arrangement method, the single-row arrangement method has higher mixing capacity, larger lateral and vertical spreading ranges of the molten, and a lower volume of stirring dead region. Moreover, the gas holdup under the single-row lance arrangement method is consistently higher than that under the double-row staggered arrangement, which proves that the former operating method is conducive to the improvement of the slag layer mixing efficiency, accelerated copper sedimentation, and reduced production energy consumption.