Sustainable Mining and Metallurgy

In this paper, for the selection of process solutions of copper smelting off-gas desulphurization, from the aspects of principle, process flow, desulphurization efficiency, process maturity, by-product comprehensive utilization, capital cost, operative cost, etc., comprehensive comparison was made between limestone-gypsum process, double alkali process, sodium-alkali process, ammonia process, hydrogen peroxide process, organic amines process, sodium citrate process and other wet desulphurization process, spray drying method and circulating fluidized bed method and other semi-dry desulphurization process and active coke desulphurization method and other dry desulphurization technologies. It was considered that the wet desulphurization process was still the most widely used and reliable technology in the copper smelting industry, of which the hydrogen peroxide process, organic amines process and other technologies have good development prospect.