Abstract:In order to investigate the effect of the particle size of the matte droplets of the Isa copper smelting process on the depletion of the electric furnace, scanning electron microscopy (SEM), high-temperature viscometer, X-ray diffraction (XRD), and specific gravity analysis were performed on the Isa electric slag. Copper exists in the copper-iron sulfide phase and matte phase. The average particle diameter of the sulfide phase is 5.26μm, the viscosity at 1200°C is 0.1004Pa.s, and the specific gravity of the sulfide phase and slag is 4738.4 kg/m3 and 3705.9 kg/m3, Based on this, the Stokes settlement formula is used to calculate the settling velocity of 914mm when the diameter of the matte droplet is 5.26μm at 1180℃, 1190℃ and 1200℃. The settling velocity is 1.87mm/h, 1.99mm/h, 2.23mm/h, the linear regression equation of temperature and settling time is: Y=0.0184X-19.882, and the degree of fit R2=0.96802. The research results show that the diameter of the matte droplets must be at least 75μm in production practice. Effective precipitation.