ABSTRACT As a by-product of steel production, the efficient treatment of metallurgical dust is an important research topic in metallurgical industry. To recycle blast furnace bag dust into metallurgical process, harmful elements (K, Na and Zn) need to be removed. By using different acidic solvents and leaching conditions to treat the bag dust, the best leaching conditions of K, Na and Zn elements were explored. The results show that the optimal leaching conditions of harmful elements in water solution are: 4 ml/g liquidsolid ratio, 50°C temperature, 30 min stirring time. Water solution has a certain removal effect on K and Na elements but has little effect on Zn content. The leaching rates of K, Na and Zn were improved by using ammonia, hydrochloric acid and sulfuric acid solutions. Sulfuric acid with a concentration of 2 mol/L has the best removal efficiency for K, Na and Zn elements in bag dust, and the maximum removal rates of K, Na and Zn are 82.3%, 81.5% and 88.7%, respectively. Through this study, the potential to leach K, Na and Zn elements from bag dust was demonstrated, and an experimental basis for the resource utilization of bag dust in metallurgical process was provided.