China Nonferrous Metallurgy

This article innovatively proposes the design concept of a cyclone reactor based on the structural characteristics of the cyclone separator in the suspension preheating equipment of cement plants and the characteristics of the high sulfur bauxite roasting reaction， and applies it for the first time in the experimental study of desulfurization in high sulfur bauxite roasting. The calcination desulfurization reaction in this reactor belongs to "suspension calcination"， with particles in a good fluidized motion state， high gas-solid mass and heat transfer efficiency， and high desulfurization efficiency. This study analyzed the velocity and pressure field distribution inside the reactor through numerical simulation. Fluent software was used to simulate the unipolar cyclone reactor， focusing on the distribution laws of tangential， axial， and radial velocities， as well as the changes in static pressure， dynamic pressure， and total pressure. The results indicate that the tangential velocity reaches its peak in the contraction section of the snail shell region， while the axial velocity exhibits a bimodal distribution in the snail shell region， effectively prolonging the residence time of particles； The static pressure distribution shows the characteristics of low center and high sides， and the dynamic pressure distribution is similar to the tangential velocity. The total pressure distribution is generally consistent with the static pressure； As the gas velocity increases， the pressure drop loss gradually increases， and the greater the velocity， the more significant the change in pressure drop； While ensuring reaction efficiency， priority should be given to using lower gas flow rates to reduce energy consumption. This study provides a theoretical basis for optimizing the design of cyclone reactors， which helps to improve the desulfurization efficiency of high sulfur bauxite and reduce production costs.