以废旧印刷电路板为原料制备超细铜粉的研究  

Preparation of Ultrafine Copper Powder from Waste Printed Circuit Boards

作　　者：李静[1] 杨建广[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《湖南有色金属》2012年第3期57-61,共5页Hunan Nonferrous Metals

基　　金：国家自然科学基金资助项目(50804056)

摘　　要：介绍了一种以废旧印刷电路板为原料经物理分选、NH3-(NH4)2SO4-H2O体系浸出铜、萃取提纯、H2SO4反萃得到CuSO4溶液,而后蒸发冷却结晶获得CuSO4.5H2O晶体,以此为原料制备超细铜粉的方法。制备超细铜粉的最佳试验条件为:先制备出Cu2O沉淀配制成100 mL悬浊液,在PVP加入量为6 g(200 mL溶液)、搅拌速度为400 r/min、NaH2PO2.H2O加入量是理论量的4倍,加料方式为将NaH2PO2.H2O分两次加入100 mL的Cu2O悬浊液中,50℃时加入40mL后以1.2℃/min的速度升温到75℃时加入剩下的60 mL,用2 g/L的苯并三氮唑溶液浸泡清洗后的超细铜粉0.5 h进行表面改性,在此条件下制备的铜粉粒度均匀,结晶度高,无团聚现象,该超细铜粉可以用于多层功能陶瓷电容器(MLCC)的电极上。In this research, a hydrometallurgical process combined ammoniac leaching and solvent extraction for the recovery of copper from metal components of WPCBs, and production ultrafine-copper particles from stripped solu- tion, was investigated. The proper experimental conditions for the copper powder using in M LCC was summarized as follows： preparation of Cu20 suspension, the dosage of PVP seed 6g, the stirring speed of 400 r/min, the dosage of NaH2P02＂ H20 seed four times of the stoichiometric quantity, NaHzP02 solution was added through two steps. Uhrafine copper powder used in M LCC was obtained, which have uniform particle size, high crystallinity, no agglomeration and satisfied the technological application requirements.

关 键 词：废旧印刷电路板 二次还原 超细铜粉 

分 类 号：TG146.11[一般工业技术—材料科学与工程]