The project is intended to produce ferro-nickel, laterite ores as raw materials, no S contained, and the SO2 contained in flue gas is from fuel coal and reduction coal. Flue gas desulfurization device flue will be reserved in order to better meet the national policy for energy conservation and emissions reduction, and be friendly to environment. It is planned to choose the limestone-gypsum wet desulphurization process which has mature technology and has been widely applied