摘要
FeCl3蚀刻液由于具有强氧化性和腐蚀能力,因而被广泛应用于惰性加工过程中,然而加工过程中产生大量的废蚀刻液,不仅污染环境而且浪费材料。为了解决与含Cu的FeCl3废蚀刻液再生循环有关的问题,本研究改进了某企业的结晶再生过程,并以CuCl2·2H2O的形式回收铜。在原始方法的基础上,加入水力旋流器以预分离浆料,通过研究不同浓度下入口流量和入口压力下水力旋流器分离效率的变化,确定最佳入口压力约为0.25 MPa。实验结果表明,离心机的工作量减少了约80%,CuCl2晶体的平均比表面积减少了50%,洗涤过程后CuCl2晶体副产物的产量增加了约20%。
FeCl3 etching solution is widely used in etching processes due to its strong oxidation and corrosion properties.However,a large amounts of waste etching solution is generated in etching process,which can possibly pollute the environment and spend materials.Aiming to address problems related to the use of recycled waste FeCl3 etching solution that contains Cu,the crystallization regeneration process in a certain company is improved and copper is recovered in the form of copper chloride crystal.Based on the original process,a hydro-cyclone is added to pre-separate the slurry.Through investigating the change of the inlet flow rate and separation efficiency of the hydro-cyclone with inlet pressure under different concentrations,the optimal inlet pressure is determined as approximately 0.25 MPa.Experimental results indicate that the workload of the centrifuge is reduced by approximately 80%,the average specific surface area of copper chloride crystal decreases by 50%.The production of copper chloride crystal byproducts is increased by approximately 20%after washing process.
作者
周先桃
陈云
方佩珍
缪晓芳
汪飞
杨彤
ZHOU Xian-tao;CHEN Yun;FANG Pei-zhen;MIAO Xiao-fang;WANG Fei;YANG Tong(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200030,China;Zhejiang Construction Investment Environment Engineering Co.,Ltd.,Hangzhou 310013,China;Bekaert(China)Technology Research&Development Co.,Ltd.,Wuxi 214429,China)
出处
《现代化工》
CAS
CSCD
北大核心
2019年第9期195-198,共4页
Modern Chemical Industry
关键词
废蚀刻液
资源回收
封闭循环
晶种回收
waste etching solution
resource recovery
closed cycle
seed recovery
