In order to explore the application status and prospects of cyclone furnaces in flash ironmaking technology, numerical simulations were conducted on the gas flow field and particle trajectories within the cyclone furnace using the Eulerian model and DPM, respectively. The effects of the rising gas(smelting reduction vessel gas)velocity and iron ore particle size on the characteristics of gas-solid two-phase flow were analyzed. The results show that the tangential velocity distribution of the vortex field approximately forms a “concave” shape in the lance region and an “M” shape in the region above the lance. As the rising gas velocity increases from 4 m/s to 8 m/s, the maximum tangential velocity of the gas decreases, and the capture rate of the iron ore particles decreases from 98.99% to 93.51%. However, the strong swirling turbulent region gradually moves upward, and the trajectory of the iron ore particles becomes longer, which is more conducive to the melting and reduction. In addition, the capture rate first decreases and then increases with increasing particle size, but the iron ore particles of large size hardly undergo upward spiral motion.
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