Abstract: With the continuous scarcity of domestic zinc resources and the rapid changes in the market, the composition of zinc concentrates selected by zinc smelting companies has become more and more complex. High-silicon, high-copper, high-lead, and high-iron mineral sources have gradually become the norm. These high impurities ore seriously deteriorates the conditions of the fluidized roaster, which greatly affects the normal progress of the roasting process. In order for zinc smelting companies to achieve rapid development in the increasingly complex market competition, in addition to organizing production at the lowest cost, they also need to be able to adapt to various complex mineral sources, especially to be able to handle high value-added zinc concentrates. Therefore, this article systematically studies the behavior and influence of Cu, Pb, SiO₂ and Fe, the key impurities in complex zinc concentrates, during boiling roasting, and aims to provide certain theoretical and practical guidance for zinc smelting enterprises to deal with complex zinc concentrates.