Soot is a necessary product in the smelting process.The soot is the peroxide particle that does not settle into the molten pool in the reaction tower of the flash furnace,and its particle size is very small and takes the molten spherical form.The generation of soot affects the direct yield of smelting,while the distribution of soot in different regions affects the selection of soot collection equipment,and the distribution of impurities in the smelting process is very important to the ingredients.In the case study of the smelting project of Zijin Copper Industry Co.,Ltd.,this paper explores the distribution of soot and impurities in the flash smelting process,so as to provide support for the refined management and control of subsequent production and improve the technical level of production and management of smelting enterprises.