Abstract:Oxygen-rich side-blown bath smelting technology is widely used in the extraction of non-ferrous metals such as copper, lead, and zinc. The waste heat boiler after the smelter plays an important role in waste heat recovery and utilization, as well as settling of dust. However, in the actual production process, the chaotic flow field of flue gas inside the furnace, the easy adhesion and accumulation of dust, and severe wear of furnace walls and components have led the reduction of waste heat recovery efficiency, low load operation, and even forced shutdown. In order to solve these problems, a multiphase particle-in-cell method was used to numerically simulate the flue gas flow characteristics, dust deposition and adhesion in a ultra-large oxygen-rich side-blown melting bath smelter with annual processing cability of 1.5 million tons of concentrate. The results indicate that the vortex of flue gas inside the furnace can cause flue gas and dust to reflux into the inlet region. The baffle moving forward can lead to increased impact and blockage of the baffle. Increasing the spacing between baffles can effectively reduce the blockage of baffles. Increasing the radiation chamber space can significantly reduce the impact of the baffle.