电极箔腐蚀废酸的资源化试验研究  

Experimental Research on Resource Utilization of Waste Acid Generated from Corrosion Process of Electrode Foil

作　　者：解彦刚[1] 蔡凤[1] 李斯恩 李乾[1] 

机构地区：[1]南通职业大学化学与生物工程学院,江苏南通226007 [2]南辉电子材料股份有限公司,江苏南通226012

出　　处：《中国给水排水》2014年第21期118-120,共3页China Water & Wastewater

基　　金：江苏省教育厅课题(JH10-17);南通市科技局课题(BK2013036)

摘　　要：针对电极箔腐蚀工艺产生的废酸液,提出了资源化利用的新思路,即电极箔腐蚀废酸经过蒸发浓缩后结晶,过滤后废酸中的硫酸和铝分离,将硫酸回用于腐蚀工艺、硫酸铝制成水处理剂,实现废酸的零排放。试验结果表明,在蒸发度为50%时,硫酸的回收率较高,同时硫酸溶液中的铝离子含量低于0.2%;经电极箔腐蚀试验验证,回收酸能满足腐蚀工艺的要求;过滤并干燥后的固体经XRD衍射证明是高纯度的硫酸铝,可作为水处理剂使用。A new idea of resource utilization of the waste acid generated from the corrosion process of electrode foil was presented. The waste acid from the corrosion process of electrode foil was crystallized after evaporation and concentration, the sulfuric acid and aluminum were separated after filtration, the re- claimed sulfuric acid was reused in the corrosion technology, and the aluminum sulfate was made into wa- ter treatment chemical, thus zero discharge of waste acid from corrosion process was achieved. Experi- ments showed that when the degree of evaporation was 50%, the sulfuric acid yield was relatively higher, and the content of the aluminum ion in the sulfuric acid solution was lower than 0.2%. The experiments about the corrosion process of electrode foil indicated that the reclaimed acid could meet the technological requirements. The solid material generated after filtration and desiccation was identified as aluminum sul- fate with high purity by XRD diffraction, which could be used as water treatment chemical.

关 键 词：电极箔 腐蚀废酸 回收利用 零排放 

分 类 号：X76[环境科学与工程—环境工程]