Sustainable Mining and Metallurgy

The ionic liquid cyclic absorption desulfurization technology had the advantages of high desulfurization efficiency, no secondary pollution, no solid residue, recycling sulfur dioxide. A nonferrous metals company in Guangxi adopted this technology to dispose of low concentration sulfur dioxide flue gas. This paper mainly introduced the process principle，process flow，the calculation and selection of main equipment parameters of ionic liquid cyclic absorption desulfurization technology. Using these equipments, after more than a year of operation, SO₂ emissions can be reduced by 5407.5t per year, and sulfuric acid can be recovered by 8432.32t per year, indicating that the ionic liquid cyclic absorption desulfurization technology had high economic and environmental benefits.