电镀污泥氯化焙烧-弱酸浸出工艺研究  

Process of Chloridizing Roasting-Weak Acid Leaching for Electroplating Sludge

作　　者：郑顺[1] 李金辉[1] 李洋洋[1] 熊道陵[1] 杨金鑫[1] 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《矿冶工程》2014年第6期105-109,共5页Mining and Metallurgical Engineering

基　　金：江西省科技厅资助项目(20122BAB213011)

摘　　要：通过对电镀污泥氯化焙烧的热力学分析,选择氯化铵为氯化剂,在焙烧温度为673 K时可以实现对主要金属离子镍、铜的氯化,而其中铁的物相以针铁矿、赤铁矿为主,理论上难以被氯化。对氯化焙烧后的物料进行弱酸浸出,最佳浸出条件为:盐酸酸度为1 mol/L、浸出时间为45 min、浸出温度为318 K、液固比4∶1,此时主金属离子镍、铜的浸出率分别为97.48%和87.65%,而铁的浸出率只有26.83%,所得结果与热力学分析比较吻合。According to the thermodynamic analysis for chloridizing roasting of electroplating sludge, main metal ions including nickel and copper can be ehloridized when roasted at 673 K with ammonium chloride as the chloridizing agent, while iron, with goethite and hematite being the dominant phase, is theoretically difficult to be chloridized. Materials from roasting were leached by weak acid, and parameters were optimized as follows ： the acidity of hydrochloric acid was 1 mol/L, leaching time was 45 min, leaching temperature was 318 K, and liquid to solid ratio was 4：1. The results are consistent with the thermodynamic analysis, as leaching rates of nickel and copper are 97.48% and 87.65%, respectively, while leaching rate of iron is only 26.83%.

关 键 词：电镀污泥 热力学 氯化焙烧 浸出 镍 铜 

分 类 号：TF111[冶金工程—冶金物理化学]