Abstract: Main chemical composition of alunite concentrate，which was recovered from Zijinshan copper tailings in Fujian by flotation，were Al₂O₃，SiO₂，K₂O and SO₃.Main mineral composition of alunite concentrate were alunite，quartz and dickite.Roasting-leaching tests were studied to extract valuable elements of Al and K from alunite concentrate.Results showed:alunite concentrate roasting at 600 ℃ for 1 h，roasted products leaching with sulfuric acid concentration of 60 g/L，leaching temperature of 80 ℃，liquid-solid ratio of 6，leaching time of 0.5 h，leaching rate of potassium was 98.47% and leaching rate of aluminum was 94.35%；Main chemical compositions of residue from leaching process were Al₂O₃ and SiO₂，whose contents totaled to 90.44%.The residue was suitable as construction materials.Test results could provide technical support for the multipurpose utilization of the alunite concentrate by acid leaching process.

Key words: Alunite concentrate, Roasting, Leaching rate