真空蒸馏分离Pb-La合金
Vacuum Distillation for Separation of Pb-La Alloy
张师凡 1杨鹏举 2赵雷 3郑文涛 4何杰2
作者信息
- 1. 沈阳工业大学材料科学与工程学院,辽宁沈阳 110870;中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳 110016
- 2. 中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳 110016;中国科学技术大学材料科学与工程学院,辽宁沈阳 110016
- 3. 辽宁石油化工大学机械工程学院,辽宁抚顺 113001
- 4. 沈阳工业大学材料科学与工程学院,辽宁沈阳 110870
- 折叠
摘要
对真空蒸馏分离Pb-La合金的可行性开展了热力学分析,基于Miedema模型和气液平衡理论,计算了Pb-La合金的气液平衡相图;开展了真空蒸馏分离Pb-La合金的实验研究,理论分析与实验相结合,揭示了蒸馏温度、蒸馏时间、炉内压强等因素对Pb-La合金真空蒸馏分离效果的影响规律,并优化了工艺参数.结果表明,真空蒸馏是Pb-La合金分离的有效方法,升高蒸馏温度、延长蒸馏时间和减小炉内压强有助Pb-La合金的分离.当蒸馏温度为1623 K,蒸馏时间为150 min,炉内压强为0.1～5 Pa时,Pb-25％La合金一 次蒸馏后,Pb的去除率约为99.98％,蒸馏剩余物中La含量可达到99％以上;真空蒸馏分离Pb-La合金,具有工艺流程短、简洁高效、绿色无污染等特点.
Abstract
The feasibility of vacuum distillation separation of Pb-La alloy was analyzed thermodynamically,and the gas-liquid equilibrium phase diagram of Pb-La alloy was calculated based on the Miedema model and gas-liq-uid equilibrium theory;the experimental study of vacuum distillation separation of Pb-La alloy was carried out,and theoretical analysis and experiments were combined to reveal the influence of distillation temperature,distil-lation time,furnace pressure and other factors on the vacuum distillation of Pb-La alloy.The results show that vacuum distillation is an effective method for the separation of Pb-La alloy,and that increasing the distillation temperature,extending the distillation time and decreasing the furnace pressure can help the separation of Pb-La alloy.When the distillation temperature is 1623 K,the distillation time is 150 min,and the pressure inside the furnace is 0.1～5 Pa,the removal rate of Pb can reach 99.98％and the purity of La can be enriched to more than 99％after one distillation of Pb-La alloy with the La content of about 25％.Vacuum distillation separation of Pb-La alloy is characterized by short process,simple and efficient,green and pollution-free.
关键词
稀土回收/合金分离/真空蒸馏/Pb-La合金Key words
rare earth recovery/alloy separation/vacuum distillation/Pb-La alloy引用本文复制引用
基金项目
国家自然科学基金项目(52174380)
国家自然科学基金项目(51974288)
国家自然科学基金项目(51875365)
中国载人航天工程空间应用系统项目(KJZ-YY-NCL06)
中国科学院科研仪器设备研制项目(YJKYYQ20210012)
广西科技计划项目(AA23023032)
云南省科技计划项目(202301BC070001-021)
出版年
2024
NETL
NSTL
万方数据