Zhuzhou Smelter Group is a state-owned high-tech enterprises, mainly engaged in the production of zinc ingots, lead ingots, silver ingots and other products. In the desulfurization project undertaken by our company, kiln smoke desulfurization was conducted on the flue gases from 4# and 5# klins of the zinc furnace II systems, and the sodium alkali method was adopted in the desulfurization process.