Abstract:The gas-solid heat transfer performance and the resistance characteristics of the material layer in the cooling section of the particle column process of copper slag particle flow waste heat recovery were studied by CFD simulation technology, and the variation law of the process parameters such as gas-solid temperature, pressure, heat transfer zone and heat transfer time in the particle column was analyzed. The results show that the pressure drop gradient is larger than the temperature gradient during the rapid forced convection heat transfer process when the cooling air enters the particle column and passes through the spherical copper slag. The higher the gas velocity, the smaller the height of the heat exchange zone, 10 m/s gas velocity corresponds to the height of the heat exchange zone is only 0.85 m, 4 m/s gas velocity corresponds to the height of the heat exchange zone is 1.4 m. The running time of heat transfer decreases with the increase of gas velocity. The shortest running time of heat transfer at 10 m/s corresponds to 30 s, and the longest running time of heat transfer at 4 m/s corresponds to 135 s. Increasing the atmospheric velocity is conducive to strengthening the gas-solid heat transfer effect in the particle tower and improving the heat transfer. The maximum heat transfer corresponding to 10 m/s gas velocity is 70000000 W.