Process for producing cadmium sheet from cadmium smoke dust

The invention relates to a process for producing a cadmium sheet from cadmium smoke dust, and belongs to the field of cadmium recovery. According to the method, the cadmium-containing smoke dust is subjected to the steps of leaching, anti-neutralization precipitation, acid dissolution, impurity removal and electrodeposition, and cadmium sheets are produced; wherein the reverse neutralization precipitation refers to that leaching filtrate containing the cadmium smoke dust is added into a neutralizer, the pH value of ore pulp is changed from high to low, the chlorine precipitation amount in cadmium hydroxide is reduced, and the chlorine content (in terms of Cl) in the cadmium hydroxide is reduced from 0.8-1.2% to 0.04-0.06%; harmful impurities such as Fe, Tl, As, Co, Ge and the like which seriously influence cadmium electrodeposition are removed through acid dissolution and impurity removal, filtrate obtained after impurity removal can be used for preparing cadmium sheets through electrodeposition, the chlorine