摘要
通过比较国内外现行从镍电解阳极液中除铜的各种方法,提出了一种新的除铜方法:将阳极液中的Cu还原后再进行离子交换除铜.考察了还原电位对离子交换操作容量的影响,发现随着还原电位的降低,离子交换操作容量增大,当电位达到0.47～0.45v时,其操作容量达到最大.得出镍电解阳极液中Cu2+还原为Cu+的最佳条件为:硫系数为4.5,pH为2.0,反应时间为0.5 h,反应温度为40℃.通过离子交换试验发现:随着高径比的增加,V2/V1(漏穿体积/树脂体积)增加,当高径比达到48.08之后,V2/V1基本不变;随着线速度的增加,漏穿体积呈二次曲线减少,其方程为:y=1 301.5-161.5X+5.75X2;随着离子交换交前液Cu离子浓度的增加,树脂操作交换容量减少;在整个交换过程中SO42-浓度基本上没有太大变化,整体呈下降的趋势.
A new method for copper removal from nickel anodic electrolyte is studied with ion exchange after its deoxidization by comparing all kinds of ways for copper removal at home and abroad. The deoxidization potential has a great effect on work capability. Its work capability increase with decreasing deoxidization potential. When the potential is between 0.47 and 0.45 V, its work capabilities are the most. The best deoxidization conditions for Cu^2＋ from nickel anodic electrolyte are： sulfur coefficient is 4.5, pH is 2.0, reaction time is 0.5 h, reaction temperature is 40 ℃. It has been shown from ion exchange experiments that the volume ratio increases with the high-radius ratio, and it reamins unchanged when high-radius ratio is 48.08. With the increase of linear speed, work volume decreas by the way of conic： Y=1 301.5- 161.5X ＋ 5.75X^2. The higher copper concentration, the less work capability. During the period of ion excharge there is no various variation in SO4^2- concentration.
出处
《矿冶工程》
CAS
CSCD
北大核心
2005年第6期51-54,共4页
Mining and Metallurgical Engineering
关键词
镍电解
阳极液
除铜
离子交换
nickel electrolysis
anodic electrolyte
copper removal
ion exchange
