NOUFERROUS METALLURGICAL EQUIPMENT

The adhesion of dust in the upward flue during the copper smelting process significantly influenced the stability and safety of production, and the issue of dust adhesion had become one of the most common problems faced by copper-making enterprises. Focusing on a specific flash smelting furnace, a numerical simulation and analysis of the flue gas flow process at the connection between the current flash smelting furnace settler outlet and the flue were conducted. By comparing the characteristics of the flue gas flow process under different structures, the following results were discovered: when an arched acceleration-type flue connection structure was used in the simulation, dust adhesion in the flue primarily occurred in the recirculation zone on the same side as the settler outlet and near the high-velocity zone on the opposite wall. This result was consistent with the main locations of adhesion phenomena found during on-site furnace maintenance. In comparison, when a horizontal connection structure was used between the settler outlet and the riser shaft, the high-velocity areas in the flue were reduced. The maximum flue gas velocity decreased by 18.8%, resulting in better flue gas flow. Additionally, the analysis of the particle phase revealed that under the flat-top structure design, the amount of dust particles in the flue decreased by 9.5%, indicating that this structure can mitigate the adhesion of dust within the flue to a certain extent.