高杂贵金属废水渣处理工艺的研究与应用  

Research and Application of Treating Wastewater Sludge Concentrating with Se、Ag、Au、Pd、Pt and Rich Impurity Elements

作　　者：宋宏儒[1] 朱纪念[1] 陈国举[1] 马玉天[1] 吴建明[1] 

机构地区：[1]金川集团股份有限公司贵金属冶炼厂,甘肃金昌737104

出　　处：《铜业工程》2014年第3期14-17,70,共5页Copper Engineering

基　　金：国家科技支撑项目(2012BAE06B00)

摘　　要：贵金属精炼过程中产生的废水渣常常含有一定量的Se、Ag、Au、Pd、Pt稀贵金属,如果将废水渣返回火法系统处理,流程长、收率低,为提升稀贵金属的精炼水平,优化整个生产工艺流程,缩短工艺流程,回收废水渣中稀贵金属采用了湿法冶炼方法,从试验到工业化生产,对贵金属废水渣进行硫酸浸出的湿法冶炼的工艺,生产表明：通过对贵金属废水渣进行硫酸浸出,能很好地实现贵贱金属的分离,成功地将废水渣中的稀贵金属富集到浸出渣中,95%以上的Au、Pd、Pt和90%的Ag、Se全部富集到浸出渣中,渣率为5～10%,浸出液中贵金属含量均小于0.0005g/L,可达标排放。废水渣硫酸浸出工业化生产,有力提升资源综合回收利用水平,社会经济效益显著,具有良好的推广应用价值。The wastewater sludge from precious metal refining process is rich with Se,Ag,Au,Pd,Pt. If the wastewater sludge were treated by pyrometallurgical method,the process was long and the recovery rate was low. In order to improve the direct recovery rate of metals and optimize the production process,the method of hydrometallurgy was used. Sulfuric acid leaching was found to be successful in enrichment PGM in the residue. The result shows that： the base elements and PGM could be separated by using sulfuric acid leaching method. Over 95% of the Au,Pd,Pt and 90% of the Ag,Se was enriched in the slag,the slag rate was 5 ～ 10%,the precious metals in the leachate were less than 0. 0005 g /L. The leachate can be discharged. The sulfuric acid leaching of wastewater sludge can promote the resource recovery which has remarkable society and economy benefit and good value of popularity and application.

关 键 词：废水渣 硫酸浸出 固液比 酸度 温度 直收率 

分 类 号：TF813[冶金工程—有色金属冶金] TF804.2