Technical research on vacuum distillation to purify magnesium to 99.99% purity

Yuan Tian; Xiaopan Zhang; Tao Qu; Fei Lyu; Hao Du; Lei Shi; Bin Yang; Yongnian Dai

doi:10.1088/2053-1591/abdf12

Materials Research Express (Jan 2021)

Technical research on vacuum distillation to purify magnesium to 99.99% purity

Yuan Tian,
Xiaopan Zhang,
Tao Qu,
Fei Lyu,
Hao Du,
Lei Shi,
Bin Yang,
Yongnian Dai

Affiliations

Yuan Tian: ORCiD; State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China
Xiaopan Zhang: State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China
Tao Qu: State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China
Fei Lyu: ORCiD; State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China
Hao Du: State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China
Lei Shi: ORCiD; State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China
Bin Yang: State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China
Yongnian Dai: State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China; Yunnan Provincial Key Laboratory for Nonferrous Vacuum Metallurgy, Kunming University of Science and Technology , Kunming 650093, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/abdf12
Journal volume & issue: Vol. 8, no. 5
p. 056506

Abstract

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In this study, the distribution and evaporation principles of impurities in distilled magnesium metal were investigated using a low vacuum (8 × 10 ^4 Pa) distillation purification experiment and theoretical analysis. Provided all other factors remain unchanged (distillation time, pressure, and total area of evaporation), the optimum temperature for preparing high-purity Mg (99.99%) is 750 °C. A detailed analysis of purified Mg was obtained by inductively coupled plasma mass spectrometer (ICP-MS) for 10 major impurity elements. After distillation at 750 °C, low vapor pressure impurities in condensed magnesium, including Si, Mn, Al, Fe, Cu, Ni, and Sn were significantly reduced as other impurities were slightly reduced. Our analysis confirmed a decrease in the following impurities: Fe, Si, Mn, Cu, and Al were reduced from 21.8, 78.6, 68.4, 4.4, and 39.4 ppm to 1.2, 9.3, 6.0, 1.0, and 5.4 ppm, respectively; satisfying the 99.99% Mg standard. The evaporation rate and separation coefficient were calculated under experimental conditions. To better describe the distillation process of metallic magnesium under low vacuum conditions, the mean free path is also calculated in this study under actual conditions.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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