Sustainable Mining and Metallurgy

In view of the problems such as instantaneous excessive chlorine gas at the outlet of the chlorine-containing tail gas spray tower, high content of valuable metal elements in the absorption liquid and frequent damage to the circulating pump in anode slime metallurgy of a company, FeCl2 process was adopted to treat the chlorine-containing tail gas. The results show that after five stages of absorption, the chlorine absorption efficiency of the FeCl2 solution prepared by reaction of FeCl3 and iron powder is higher than 99%, and the chlorine content at the outlet of the absorption tower is less than 60mg/m³. The chlorine emission can reach the standard. The process reduces the damage rate of circulating pump by more than 70%, and chlorine gas emission by more than 50%, and also reduces the loss of Cu, Se, Te, etc., caused by being brought into the absorption system. It provides a reference for reducing the emission of chlorine-containing tail gas in metallurgy and green production.