线路板蚀刻废液资源化处理零排放新工艺

Zero Emission for Resource Utilization of Circuit Board Spent Etching Solution

对广州市白云区南溪化工厂开发出的一套对线路板蚀刻废液集中资源化处理的零排放处理新工艺的工艺条件进行了深入研究,并通过正交试验的方法,优化了最关键的三个工艺条件,即混合生石灰加入量为碱式氯化铜泥重量的0.8倍,焙烧温度为500℃,粉碎粒度为100目。在此条件下处理后的物料,通过摇床分选后得到的氧化铜纯度达96.5%,回收率达97.1%。由于这套工艺通过在固相条件下生成氧化铜并用重力分选的方法将其分离出来,克服了原有工艺的缺陷,使废液中所有的成分能够在较低的处理成本下全部分离回收,完全无“三废”排出,达到了清洁生产的要求。此工艺已经投入运行,效果理想。

The earliest domestic originated zero emission clean production process for mass centralized resource utilization of circuit board spent etching solution developed by Nanxi Chemical Plant,Baiyun District of Guangzhou was studied and three key technical conditions were optimized by orthogonal experiment including weight of mixed quicklime of 0.8 times of tribasiccopperchloride,roaster temperature of 500℃ and crush granularity of 100 screen mesh.The cupric oxide separated from material treated by shaking table was 96.5% in purification and 97.1% in recovery rate.The components in spent etching solution will be reused at low cost without emission of wastewater,waste gas and solid waste,which can meet the demand of clean production.