کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8044676 | 1518922 | 2018 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Application of vacuum distillation in refining crude lead
ترجمه فارسی عنوان
استفاده از تقطیر خلاء در پالایش سرب خام
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کلمات کلیدی
سرب خام تقطیر خلاء، پالایش،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
چکیده انگلیسی
This paper introduces a new process for refining crude lead by vacuum distillation. The saturated vapor pressures of lead and impurity elements were calculated, and the removal effect of impurity elements was quantitatively predicted using the vapor-liquid equilibrium diagram. In addition, the low temperature followed by high temperature vacuum distillation method and the high temperature followed by low temperature method were adopted to adjust the order of impurity removal. The refining effect was experimentally studied using these two methods, and the best parameters were determined. The predictions are in close agreement with the experimental results. Based on theoretical and experimental analyses, a new, clean and efficient process for refining crude lead was developed. First, the crude lead was distilled by vacuum distillation at 10Â Pa and 1673Â K for 30Â min, and then, the volatiles and residues were collected. Second, the volatiles were vacuum distilled at 10Â Pa and 1273Â K for 30Â min. The removal rates of Cu, Sn, Ag, Zn, Sb and Bi were 99.73%, 99.72%, 96.23%, 90.78%, 74.80% and 8.82% respectively, and the purity of Pb reached 99.03%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 148, February 2018, Pages 140-148
Journal: Vacuum - Volume 148, February 2018, Pages 140-148
نویسندگان
Yongwei Zhang, Juhai Deng, Wenlong Jiang, Qingsong Mei, Dachun Liu,