我局旋涡炉产出的烟灰成分一般为(％):Zn65～66,F 0.1～0.2,Cl 0.25～0.45,SO_4~-3～4,As 0.4～0.7,Sb 0.1～0.2,Pb～4;此外尚含有Ge、Co、Cu等金属元素。由于烟灰中氯含量较高,在电解过程中严重影响电锌的质量。为了改善电锌质量,我们在原采用的铜渣除氯流程的基础上,进行了用碳酸钠碱洗除氯的试验,取得了满意 The ash content of the vortex furnace produced by our bureau is generally as follows: Zn65 ~ 66, F 0.1 ~ 0.2, Cl 0.25 ~ 0.45, SO_4 ~ -3 ~ 4, As 0.4 ~ 0.7, Sb 0.1 ~ 0.2, Pb ~ 4; In addition, still contains Ge, Co, Cu and other metal elements. Due to the high chlorine content in the soot, the quality of the electrical zinc is seriously affected in the electrolysis process. In order to improve the quality of electric zinc, we carried out the experiment of washing chlorine with sodium carbonate base on the basis of the original copper slag dechlorination process and achieved satisfactory results