互补型混合床阳极处理铜氰络合物废水的试验研究  

STUDY ON THE TREATMENT OF Cu-CYANIDE WASTEWATER BY COMPLEMENTARY MIXED BED ANODE

作　　者：庞文亮 胡冠民 

机构地区：[1]国家机械委第七设计研究院

出　　处：《电镀与环保》1989年第6期18-22,共5页Electroplating & Pollution Control

摘　　要：常规的固定床阳极仅由一种导电填料组成,因此必然存在着超电位的不均匀分布,导致容积利用率降低。而互补型混合床阳极则是采用两种电化学性能不同的导电填料,利用它们在同一超电位下电化学反应速度的“互补”关系,形成一种新型的电极。它解决了由于超电位分布不均匀而引起的床层各断面电化学反应速率不相等的问题,从而提高了床层利用率,降低了处理能耗,缩短了电解处理时间。实验表明:铜的回收率在90％以上,极限处理浓度为5mg/L,氰的氧化能耗为19.7Kwh/KgCN^-,停留时间为8.3分钟,且能将氰处理达到排放标准(小于0.5 mg/L)。Since the conventional fixed bed anode is composed of only a single kind of filler, it is inevitable that there exist an ununiform overpotential, which leads to the capacity factor to be decreased. The complementary mixed bed anode adopts two kinds of conductive filler with different electrochemical performance. The complementary relation of the electrochemical reac- tion rate between two filler at same overpotential makes it possible to form a new type elect- rode. Therefore the trouble of the unequal electrochemical reaction rate at different sections of the bed layer caused by the ununiform distribution of the overpotential is solved. As a result, peccentage of utilization of the bed is increased, the energy comsumption decreased and the duration for electrolytical treatment shortened. Tests show that the recovery ratio of copp- er is over 90%, limitimg treat concentration 5mg/L, oxidation energy consumption of cyanide 19.7 KWH/kgCN, residence time 8.3 min, and after the treatment the cyanide concentration can meet the requirment of the discharge specification (less than 0.5 mg/L).

关 键 词：混合床 铜氰络合物 电镀 废水 阳极 

分 类 号：X781.03[环境科学与工程—环境工程]