There is a problem that high zinc raw materials cannot be fully dezincized in the process of rotary hearth furnace to treat zinc-containing dust，so the on-site metallized pellet products is analyzed to discuss the causes of zinc residue. The effects of applied airflow on the reaction behavior of zinc and iron during the reduction process are studied， and the effects of N₂ flow rate and CO content on the reduction effect of metallized agglomerates are investigated specifically. The results show that the ferrocrystals and low-melting compounds generated during the reductive roasting process block the pores and hinder the volatilization of zinc，so that the zinc attaches to the ferrocrystals in the form of Zn and ZnO. When the nitrogen velocity is increased from 0 to 6 m/s，the dezincification rate is increased from 50. 83% to 93. 19% ，and the metallization rate is decreased from 74. 69% to 67. 92%. When the CO volume fraction is increased from 0 to 40% ，the dezincification rate is remained above 90% ，and the metallization rate is increased from 68. 30% to 85. 77% ，indicating that the reducing airflow could promote the volatilization of zinc and improve the metallization rate. The analysis of the mechanism of airflow-enhanced dezincification show that the formation of liquid phase or the growth of iron crystals hinders the volatilization channel of zinc under the condition without airflow，resulting in the enrichment of zinc in the agglomerate，while the external reducing airflow could increase the rate of zinc volatilization and promote the volatilization process of zinc.