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Metallurgical and Materials Transactions B

Erschienen in:

18.10.2016

Novel Method to Prepare Magnesium by Aluminothermic Reduction of Magnesia and Calcium Hydroxide at Normal Atmosphere, 1223 K (950 °C)

verfasst von: Teng Zhang, Shuang-Ming Du, Wan-Chang Sun, Ju-Mei Zhang, Li-Bin Niu, Bin Zheng, Xiao-Hu Hua

Erschienen in: Metallurgical and Materials Transactions B | Ausgabe 1/2017

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Abstract

An experimental apparatus was designed to investigate the aluminothermic reduction of the mixture of MgO and Ca(OH)₂ at normal atmosphere, 1223 K (950 °C), with the molar ratio of MgO:Al:Ca(OH)₂ to be 3:2:1, reinforced by high-energy ball milling. The effect of mechanical milling time and content of grinding aid (sodium stearate) on the reduction ratio of MgO were studied. Moreover, the reduzate and reactant activated by ball milling were analyzed by X-ray diffraction, scanning electron microscopy, and energy-dispersive spectrometer analysis. The average grain sizes of Al and MgO activated by ball milling were also calculated by Scherrer formula. The results indicate that the reduction ratio of MgO is increased with increasing mechanical milling time and content of sodium stearate. The high-energy ball milling has good reinforcement on the aluminothermic reduction of MgO. Moreover, the strengthening mechanism of mechanical force on the reaction was further discussed.

Vorheriger Artikel Computational and Experimental Study of the Transient Transport Phenomena in a Full-Scale Twin-Roll Continuous Casting Machine

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Titel: Novel Method to Prepare Magnesium by Aluminothermic Reduction of Magnesia and Calcium Hydroxide at Normal Atmosphere, 1223 K (950 °C)
verfasst von: Teng Zhang
Shuang-Ming Du
Wan-Chang Sun
Ju-Mei Zhang
Li-Bin Niu
Bin Zheng
Xiao-Hu Hua
Publikationsdatum: 18.10.2016
Verlag: Springer US
Erschienen in: Metallurgical and Materials Transactions B / Ausgabe 1/2017
Print ISSN: 1073-5615
Elektronische ISSN: 1543-1916
DOI: https://doi.org/10.1007/s11663-016-0821-8

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