摘要
为了减少阳极泥对环境的污染,并且对阳极泥里有价金属进行回收再利用。以陕西省某公司锌电积过程中产生的阳极泥为原料进行超声波和常压浸出铜的预处理,再用预处理产物进行超声波-亚硫酸钠浸银法研究浸出温度、亚硫酸钠浓度、p H值和超声频率等因素对银浸出率的影响。通过X射线衍射仪(XRD)、傅立叶变换红外光谱(FTIR)、扫描电镜(SEM)、电感耦合等离子体光谱仪(ICP)等对样品进行检测分析。结果表明,最优浸出铜工艺条件是硫酸浓度为2.0 mol/L,反应温度为70℃,反应时间为60 min,浸出液固比(mL:g)为4:1,通气速率为0.2 L/min,超声波频率为80 KHz,Cu的浸出率为87.36%。最优浸出银工艺条件是浸出温度为30℃、亚硫酸浓度为200 g/L、pH值为8、超声波频率为80 KHz,Ag的浸出率为96.27%。
In order to reduce the environmental pollution caused by anode slime and recycle the valuable metals contained within it,a pretreatment process involving ultrasonic wave and atmospheric pressure leaching of copper was conducted using anode slime generated during the zinc electrowinning process at Shaanxi Zinc Industry Co.,Ltd.as the raw material.Subsequently,the pretreated product was used to study the effects of factors such as leaching temperature,sodium sulfite concentration,pH value,and ultrasonic frequency on the silver leaching rate using an ultrasonic-sodium sulfite leaching method.The samples were analyzed using X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy(SEM),and inductively coupled plasma optical emission spectrometry(ICP).The results showed that the optimal conditions for copper leaching were a sulfuric acid concentration of 2.0 mol/L,a reaction temperature of 70℃,a reaction time of 60 minutes,a liquid-to-solid ratio(mL:g)of 4:1,an aeration rate of 0.2 L/min,and an ultrasonic frequency of 80 KHz,achieving a copper leaching rate of 87.36%.The optimum leaching conditions for Ag were as follows:leaching temperature was 30℃,sulfite concentration was 200 g/L,pH value was 8,ultrasonic frequency was 80 KHz,and the eaching rate of Ag was 96.27%.
作者
刘倩
刘彦峰
黄菊
LIU Qian;LIU Yan-feng;HUANG Ju(College of Chemical Engineering and Modern Materials,Shangluo University/Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo726000,Shaanxi)
出处
《商洛学院学报》
2024年第6期58-62,共5页
Journal of Shangluo University
基金
陕西省重点研发计划项目(2022GY-379)
陕西省教育厅重点实验室科研项目(22JS014)。
关键词
锌电积
阳极泥
CU
AG
zinc electrowinning
anode slime
Cu
Ag
