制备细铜粉的新方法.pdfVIP

学兔兔 第26卷第5期 粉末冶金技术 Vo1．26．No．5 2008年1O月 Powder Metallurgy Technology Oct．2008 制备细铜粉的新方法 刘维平 (江苏技术师范学院化学化工学院，江苏常州 213001) 摘 要： 以铜精矿为原料，通过活化预处理，采用超声场辅助矿浆电解的方法直接将铜精矿制备成平均粒度 小于lO／an的细铜粉。采用高能球磨方法对铜精矿进行预处理，分析了预处理后铜精矿粒度和结构的变化； 讨论了电解温度对铜浸出率和铜粉粒度的影响规律；研究了电流密度和超声波对铜粉粒度和比表面积的影 响；研究了抗氧化处理后铜粉纯度及形貌的变化。结果表明：铜浸出率和铜粉粒度随着电解温度的升高而增 加；电流密度的增加有利于细铜粉的形成；超声波可以明显地改善细铜粉的分散性能；铜粉经油酸和丙酮的表 面改性处理后，纯度和抗氧化性能得到提高。 关键词：铜粉；超声；矿浆电解 New technic of fine copper powder preparation Liu Weiping (School of Chemistry and Chemical Engineering， Jiangsu Teachers University of Technology，Changzhou Jiangsu 213001，China) Abstract：Copper concentrate was adopted in the trial as raw material，fine copper powder which average size is Iess than lOpm WaS gained in the slurry electrolysis cell under ultrasonic field and mechanical activation pretreatment． Copper concentrate WSS pretreated by high energy hall mil1．The size and structural of pretreated copper concentrate were analysed．The influence of electrolysis temperature on the copper leaching rate and size were studied．The influence of current’density and ultrasonic on the copper powder size and specifc SUrfflee area were studied．The purity and shape of copper powder was analysed after antioxidation treatment．The results show that copper leaching rate and copper powder size increase with the increasing of electrolysis temperature；high curren