电解液循环方式对电解能耗及铜粉性能的影响  

Effects of electrolyte circulation form on energy consumption andproperties of electrolytic copper powder

作　　者：向小艳 夏文堂[1] 杨文强[1] 尹建国[1] XIANG Xiaoyan;XIA Wentang;YANG Wenqiang;YIN Jianguo(School of Metallurgical and Materials Engineering, University of Science and Technology, Chongqing 401331, China)

机构地区：[1]重庆科技学院冶金与材料工程学院,重庆401331

出　　处：《粉末冶金材料科学与工程》2019年第1期21-26,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(51604055;51674057);重庆市教委科学技术研究项目(KJ1601306)

摘　　要：利用具有平行流进液装置的新型电解槽,在电解液总流量为18 L/min条件下,采用不同的进液模式制备电解铜粉,研究电解液进液方式对槽电压、电流效率、电解能耗和铜粉性能的影响,对电解法制备铜粉的节能降耗进行探索。结果表明,采用传统进液方式时能耗为3.01×10~6 kJ/t,电流效率为94.42%,铜粉粒度为3.47μm,粒度分布集中;采用传统进液协同阴极双侧平行进液的方式能有效地降低电解过程的槽电压和电解能耗,并且随双侧平行进液流量增大,电流效率增加,能耗下降,但铜粉粒度增大。当双侧平行进液的喷液口流量为6 L/min时较合适,电解能耗较低,为2.55×10~6 kJ/t,铜粉的平均粒度为4.65μm,95%以上的铜粉粒度小于7.2μm,且铜粉具有明显的树枝状结构,与传统电解得到的铜粉性质相比没有明显差别;当喷液口流量进一步增大至9 L/min(即单独采用双侧平行喷液方式)时,电解能耗进一步下降至2.17×10~6 kJ/t,电流效率提高至96.95%,但铜粉粒度增加至45.76μm,且粒度分布出现明显的分级。The electrolytic copper powder was prepared by using a new type of electrolytic cell with parallel feed device under the condition of total flow rate of 18 L/min.The effects of electrolyte feeding mode on cell voltage,current efficiency,energy consumption and copper powder properties were studied.The energy saving and consumption reduction of copper powder electrolysis process were also explored.The results show that the energy consumption is 3.01×10^6kJ/t,the current efficiency is 94.42%,the particle size of copper powder is 3.47μm,and the particle size distribution is concentrated by wing traditional injection method.The cell voltage and energy consumption of electrolysis process can be effectively reduced by using the traditional mode of parallel and bilateral flow.With the increase of the flow rate of bilateral parallel flow,the current efficiency increases and the energy consumption decreases,but the particle size of copper powder increases.When the flow rate of the spray nozzle is 6 L/min,the electrolysis energy consumption of 2.55×10^6kJ/t is low,the average particle size of copper powder is 4.65μm,the particle size of more than 95%copper powder is less than 7.2μm,and the copper powder has obvious dendritic structure.There is no obvious difference in the properties of copper powder obtained from traditional electrolysis.When the nozzle flow rate further increases to 9L/min,the energy consumption of electrolysis decreases to 2.17×10^6kJ/t,and the current efficiency increases to 96.95%,but the particle size of copper powder increases to 45.76μm,and the particle size distribution is obviously graded.

关 键 词：电解铜粉 新型电解槽 电流效率 电解能耗 铜粉粒度 

分 类 号：TF811[冶金工程—有色金属冶金]