Zinc is one of the non-ferrous metals which has considerable applications in a variety of industries due to its unique properties. Zinc can be extracted from oxide and sulfide minerals using thermal and wet processes. Nowadays, production of Zinc by hydrometallurgical process is extending owing to the advantages of this method. In addition to Zinc production from its concentrate, recovery of Zinc from secondary Zinc-rich resources such as wastes, brass melting slag, flue dust of industrial processes, non-ferrous and automobile scraps is also promising. Accumulation of these materials in the nature, in addition to economical outcomes, cause environmental contamination. Considering these resources Zinc extraction is highly important. Brass furnace flue dust is one of the mentioned secondary resources. In this study, Zinc extraction from these dusts was investigated to determine the optimum conditions. In this work, leaching process with sulfuric acid was applied. The parameters studied in leaching process were acid concentration, pulp density, stirring rate and temperature. Moreover, in order to remove Cl as a harmful impurity from mentioned dusts, method of roasting was used. The obtained results of leaching experiments showed that sulfuric acid concentration significantly effects on the amount of Zinc recovery so that at concentration of 1 molar after 9 minutes only, more than 98% of Zinc was recovered. Increase in the rate of stirring had considerable effect on reducing the time required for maximum Zinc extraction. Optimum values for stirring rate and pulp density were determined to be 1250 rpm and 0.1g/cm 3 , respectively. Temperature had negligible effect on leaching efficiency. In Cl elimination experiments using roasting of dusts, the effect of roasting time and temperature were examined. Following these experiments, it was concluded that temperature of 950 0 C for 60 minutes resulted in diminishing of Cl content to below 100 ppm. Additionally, it was found that diffusion controlled kinetic model Keywords: Zinc extraction; Secondary materials; Hydrometallurgy; Leaching; Sulfuric acid, Roasting .