摘要
如何保证电解液中Cu^(2+)浓度处于生产要求范围一直是铜电解精炼工艺研究的热点和难点,铜电解液的蒸发结晶过程是保证Cu^(2+)浓度的一个关键因素。本文对强磁场循环系统下电解液的蒸发结晶和冷却过程对结晶物质量的影响进行了试验,分析强磁场作用下磁化时间和流速与铜电解液发生共振的内在机理,得出了以下结论:强磁场协同作用于铜电解液时,恒定磁场强度与铜电解液中分子的转动能态会发生共振,并达到极限值,促进电解液的蒸发结晶和冷却;流速越小、磁化时间越长越有利于电解液蒸发结晶和冷却;蒸发结晶的最佳参数为磁场强度3 T、流速0.3 m/s、磁化时间1.5 h,在此条件下,电解液的蒸发率增加14%;冷却的最佳参数为磁场强度3 T、流速0.3 m/s、磁化时间1.5 h,在此条件下,电解液冷却过程的蒸发率增加5%,结晶物质量增加19.73%。磁场强化铜电解液蒸发结晶过程可显著提高电解液净化效率,有助于减轻铜电解过程的浓差极化,促使铜电解液铜酸比例处于动态平衡状态,从而提高阴极铜质量,降低铜电解过程的能耗。
It has been a hot spot and challenge in the research on copper electrorefining process to maintain Cu^(2+)concentration within the range required by production.The evaporative crystallization of copper electrolyte is a key factor in ensuring proper Cu^(2+)concentration.Effects on crystal mass by strong magnetic field circulating system in the process of electrolyte evaporative crystallization and cooling are tested to analyze the internal mechanism of resonance associated with magnetization time,flow rate and copper electrolyte under strong magnetic field.Based on the results,when strong magnetic field acts synergically on copper electrolyte,resonance will occur to maximum between the constant magnetic field intensity and the rotational energy state of molecules in the copper electrolyte,promoting evaporative crystallization and cooling of the electrolyte.The lower the flow rate and the longer the magnetization time,the better the evaporative crystallization and cooling of electrolyte will be.At the optimal parameters for evaporative crystallization,i.e.magnetic field intensity 3T,flow rate 0.3 m/s and magnetization time 1.5 h,the evaporation rate of electrolyte increases by 14%.For the cooling process,the optimal parameters of magnetic field intensity 3T,flow rate 0.3m/s and magnetization time 1.5h contribute to an evaporation rate increase of 5%and a crystal mass increase of 19.73%.To optimize the evaporative crystallization process of copper electrolyte by magnetic field can significantly improve electrolyte purification efficiency.It is positive to mitigate the concentration polarization of copper electrolysis process and stimulates the copper acid ratio of electrolyte to stay in dynamic equilibrium.The quality of copper cathode is thus improved at lower energy consumption during the copper electrolysis process.
作者
关甫江
姚夏妍
李学国
杨富荣
牛永胜
鲁兴武
程亮
李俞良
GUAN Fu-jiang;YAO Xia-yan;LI Xue-guo;YANG Fu-rong;NIU Yong-sheng;LU Xing-wu;CHENG Liang;LI Yu-liang
出处
《中国有色冶金》
CAS
北大核心
2021年第5期17-23,共7页
China Nonferrous Metallurgy
基金
甘肃省工业绿色低碳转型升级研究课题(GGLD-2019-28)
白银市2019年科技计划项目(2019-1-12G)。
关键词
铜电解
电解液Cu^(2+)浓度
磁场协同效应
蒸发结晶
冷却
结晶物质量
电解液净化效率
浓差极化
copper electrolysis
Cu2+concentration of electrolyte
magnetic field synergy
evaporative crystallization
cooling,crystal mass
electrolyte purification efficiency
concentration polarization
作者简介
关甫江(1988-),男,工程师,白银有色集团股份有限公司铜业公司副总经理;通讯作者:姚夏妍,从事强磁作用下冶金新材料研发工作。
