The GM‐IX process: A pilot study for recovering zinc cyanides
The GM‐IX process: A pilot study for recovering zinc cyanides
复制标题
GM-IX 工艺：回收氰化锌的初步研究
DOI：
10.1080/10934529709376537
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
M. Semmens
中科院分区：
文献类型：
--
作者：
Amy Short;Stephen F. Haselmann;M. Semmens
摘要 GM-IX工艺是一种结合了离子交换（IX）和透气膜（GM）技术的新型工艺，用于从电镀冲洗水中分离和回收金属和氰化物。能够处理 3.5–7.5 L/min 冲洗水的中试工厂安装在商业氰化锌电镀生产线上，并通过三个完整的服务和再生周期进行运行。研究表明，尽管进水浓度存在很大差异，强碱性阴离子交换树脂仍可将游离氰化物和络合氰化物降低至可接受的水平。没有观察到游离氰化物的早期突破，离子交换器去除了 > 98% 的总流入氰化物以及 > 87% 的锌。当树脂用酸再生时，通过商业透气膜接触器循环的苛性碱溶液不断地从酸再生剂中去除 HCN。所得的再生剂溶液基本上不含氰化物且富含硫酸锌，而腐蚀性...
Abstract The GM‐IX process is a novel process that combines ion exchange (IX) and gas‐permeable membrane (GM) technologies for the separation and recovery of metals and cyanides from electroplating rinsewaters. A pilot plant capable of treating 3.5–7.5 L/min of rinsewater was installed on a commercial zinc cyanide plating line and operated through three complete service and regeneration cycles. The study demonstrated that a strongly basic anion‐exchange resin reduced free and complexed cyanides to acceptable levels in spite of wide variations in influent concentrations. No early breakthrough of free cyanide was observed, and the ion exchanger removed > 98% of the total influent cyanide as well as > 87% of the zinc. As the resin was regenerated with acid, HCN was continuously stripped from the acid re‐generant by a caustic solution that was circulated through a commercial gas‐permeable membrane contactor. The resulting regenerant solution was essentially cyanide‐free and zinc sulfate‐rich, while the causti...