文献类型：会议论文

英文题名：Study on closed recycling regeneration process of FeCl3 waste etching solution and recovery of Copper

作者：Miao, X. F.[1];Zhou, X. T.[1];Wang, R. X.[1];Zhai, D. H.[1];Ran, H. H.[1]

机构：[1]East China Univ Sci & Technol, Inst Chem Machinery, Shanghai, Peoples R China

会议论文集：2nd International Conference on Water Resource and Environment (WRE)

会议日期：JUL 23-26, 2016

会议地点：Shanghai, PEOPLES R CHINA

语种：英文

外文关键词：Corrosive effects - Iron compounds - Copper compounds - Etching - Recycling - Cyclone separators

摘要：FeCl3 etching solution is widely used in etching processes due to its strong oxidation and corrosion properties. However, significant amounts of waste etching solution is produced, which pollutes the environment and wastes materials. Aiming to address problems related to the use of recycled FeCl3 waste etching solution containing Cu, the crystallization regeneration process in an enterprise was improved and the copper element was recovered in the form of copper chloride crystal. Based on the original process, a hydrocyclone was added to pre-separate the slurry. By investigating the change of the inlet flow rate and separation efficiency of the hydrocyclone with inlet pressure under different concentrations, the optimal inlet pressure was determined to be approximately 0.25Mpa. Experimental results indicated that the workload of the centrifuge was reduced by approximately 80%, the average specific surface area of the copper chloride crystal was decreased by 50%, the production of copper chloride crystal byproducts after washing process was increased by approximately 20% and regeneration of FeCl3 waste etching solution was also realized.