This study focused on the copper dross converter at a specific lead smelter.By comparing the experimental data of coaxial jet methane burners,the combustion and turbulence models were validated.A multi-physics numerical model for the copper dross converter was developed,and simulations of natural gas combustion and heat transfer were carried out under various operating conditions.The distribution patterns of the velocity field,temperature field,and concentration field inside the converter were analyzed in detail.The results indicate that natural gas is thoroughly mixed and fully combusted in the converter,with limited optimization potential for the air-fuel ratio and burner structure.The flames from burners 1# and 2# at the converter top primarily transfer heat to the melt via thermal radiation,while the flames from burners 3# and 4# along the converter body mainly transfer heat through thermal convection.The average temperature along the converter length (from the top to the bottom) decreases progressively.At the radial section where burners 3# and 4# are located,a temperature peak is observed,coinciding with the position of the velocity peak.The regions of the refractory brick lining heavily eroded are found near the top of the converter head and the slag line of the converter head,with local high temperatures identified as the primary cause of erosion.
关键词
铜浮渣转炉/天然气燃烧/数值模拟/烧嘴
Key words
copper dross converter/natural gas combustion/numerical simulation/burners
维普
万方数据