自熔炉の精鉱バーナー内の精鉱粒子の分散挙動に関する数値的研究

抄録

The smelting performance of a flash smelting furnace in the copper smelting process depends on the efficient premixing of concentrate particles and reaction air in the concentrate burner. When the concentrate particles and reaction air in the burner are well-premixed, the flowing pressure shows an additional pressure drop due to the interaction between the particles and the gas flow.
In this study, the flow profile of the reaction air and the dispersion behavior of the concentrate particles in the concentrate burner are simulated by using numerical models in order to reveal the particle dispersion mechanism in the reaction air. When the concentrate particles are not fed into the burner, the reaction air mainly flows down along the inner wall of the burner cone and a large circulation flow is formed inside the main flow. The upward flow of the circulation flow formed below the concentrate chute prevents the concentrate particles fed through the chute from flowing down in the axial direction, and the particles consequently spread in the radial direction.