Sustainable Mining and Metallurgy

After hydrometallugical desulfurization, the offgas is basically saturated. As the offgas contains a large amount of steam, once discharged into the atmosphere and cooled by the surrounding cold air, a large amount of white smoke will be produced. Taking a copper containing solid waste treatment project as an example, this paper introduced the composition of process offgas and secondary offgas after ionic liquid desulfurization, and the condensation reheating method was selected through comparison of white smoke eliminating technology， and analyzed the design parameters of the equipment and the characteristics of the technology. The production shows that this technology not only realizes the combined recovery of water and harmful substances, but also has good elimination effect. There is basically no white smoke and tailing throughout the year, and no additional heat source is required. It saves energy consumption and has low operating cost.