Diffusion and phase transformations during the reaction between ferrosilicon and CaO·MgO under vacuum

Fu, Daxue; Ji, Zonghui; Guo, Junhua; Han, Jibiao; Zhang, Dou; Liu, Yan; Zhang, Ting‐an; Guan, Lei

doi:10.1016/j.jmrt.2020.02.062

Cited by 10 publications

(2 citation statements)

References 13 publications

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“…CO 2 emissions are large, i.e., for the production of 1 t metal magnesium, there are emissions of about 23 t CO 2 (excluding ferrosilicon smelting). Professor Zhang Ting-an led a team [127,128] who broke through the theoretical limitations of the vacuum concept and put forward the concept of the 'Relative vacuum', which realized the magnesium smelting process under normal pressure or slightly positive pressure. The so-called relative vacuum is the difference between the actual partial pressure of magnesium vapor in the container and the equilibrium partial pressure of the reaction at this temperature.…”

Section: Relative Vacuum Methodsmentioning

confidence: 99%

Research on the Process, Energy Consumption and Carbon Emissions of Different Magnesium Refining Processes

Zhang

2023

Materials

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Under the policy of low carbon energy saving, higher requirements are put forward for magnesium smelting. As the mainstream magnesium smelting process, the Pidgeon process has the disadvantages of a long production cycle, high energy consumption and high carbon emission, which makes it difficult to meet the requirements of green environmental protection. This paper reviews the research progress on different magnesium smelting processes and further analyzes their energy consumption and carbon emissions. It is concluded that the standard coal required for the production of tons of magnesium using the relative vacuum continuous magnesium refining process is reduced by more than 1.5 t, the carbon emission is reduced by more than 10 t and the reduction cycle is shortened by more than 9.5 h. The process has the advantages of being clean, efficient and low-carbon, which provides a new way for the development of the magnesium industry.

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Section: Relative Vacuum Methodsmentioning

confidence: 99%

Research on the Process, Energy Consumption and Carbon Emissions of Different Magnesium Refining Processes

Zhang

2023

Materials

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“…Magnesium (Mg) is one of the lightest structural metal materials. Due to its low density and high strength, its alloys are widely used in the automobile industry, electronics, aerospace, and other important fields [1][2][3]. The main production methods for Mg in the world are thermal reduction and molten salt electrolysis of MgCl 2 [4,5].…”

Section: Introductionmentioning

confidence: 99%

Nucleation and Condensation of Magnesium Vapor in Argon Carrier

Han

Guo

et al. 2020

Metals

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The nucleation and condensation of Magnesium (Mg) vapor carried by argon gas (Ar) were examined. The condensation of Mg vapor at a heat source temperature of 1273–1473 K and Ar flow rate of 0.1–0.4 m3/h was analyzed. The result indicated that the condensation temperature is affected by the heat source temperature and Ar flow rate, and the condensation temperature of Mg vapor was 1013.3 K at a heat source temperature of 1473 K and Ar flow rate of 0.2 m3/h. The effects of Mg vapor partial pressure and temperature of the condensation zone on the nucleation and condensation of Mg vapor carried by Ar were calculated and analyzed in terms of atomic collisions and critical nucleation radius. Increased vapor oversaturation and decreased condensation temperature were favorable for liquid nucleation growth. The Mg condensation products in Ar flow rate of 0.2 m3/h at a heat source temperature of 1473 K were analyzed by XRD, SEM, and EDS, which indicated that the condensed product was of high purity and not easily oxidized in Ar flow. In this paper, the quality of Mg vapor condensation was controlled, which provided the theoretical and experimental basis for a continuous Mg production process.

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Research on Extracting Magnesium from Carbide Slag and Magnesite in Flowing Argon Atmosphere

Guo

Han

et al. 2021

The Minerals, Metals &Amp; Materials Series

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Diffusion and phase transformations during the reaction between ferrosilicon and CaO·MgO under vacuum

Cited by 10 publications

References 13 publications

Research on the Process, Energy Consumption and Carbon Emissions of Different Magnesium Refining Processes

Research on the Process, Energy Consumption and Carbon Emissions of Different Magnesium Refining Processes

Nucleation and Condensation of Magnesium Vapor in Argon Carrier

Research on Extracting Magnesium from Carbide Slag and Magnesite in Flowing Argon Atmosphere

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