Removal of Ca from Magnesium Melt by Flux Refining
| Autor: | Ki-Woo Lee, Ji-Young Yoon, Jeong Whan Han, Ui-Hyun Baek, Gil-Soo Han, Byeong-Deok Lee |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Magnesium 020502 materials Mechanical Engineering Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Viscosity Flux (metallurgy) 0205 materials engineering X-ray photoelectron spectroscopy chemistry Mechanics of Materials Melting point General Materials Science 0210 nano-technology Spectroscopy Chemical composition Refining (metallurgy) |
| Zdroj: | MATERIALS TRANSACTIONS. 57:1156-1164 |
| ISSN: | 1347-5320 1345-9678 |
| DOI: | 10.2320/matertrans.m2015426 |
| Popis: | Magnesium refining processes re typically based on the use of fluxes, most of which contain MgCl2, KCl, NaCl, CaCl2, or HaCl(2). These fluxes separate the surface oxides, gases, or other contaminates from the metal, The most important physical and chemical properties of a salt melt are the fusibility, density in the operating temperature range (920-1023 K), and viscosity. Therefore, in this study, the physical and chemical properties of various molten salts were examined to find a new refining flux with a low melting point, low viscosity, high reactivity, and good melt protection using thermodynamic calculations and various experiments using inductively coupled plasma emission spectroscopy, scanning electron microscopy-energy dispersive spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. In addition, the effects of the chemical composition of the flux, amount of flux, fluxing temperature, and stirring time and intensity on the relining process of molten magnesium were studied. The optimized conditions for the Mg refining process resulted in a ternary flux system with 31 mass% MgCl2, 60 mass% KCl, and 9 mass% NaCl, through the addition of 1 mass% CaF2 and 5 mass% MgO, and stirring at 150 RPM for 15 min at 953 K. |
| Databáze: | OpenAIRE |
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