Interaction of magnesium production salt melts with atmospheric air

Izvestiya Vuzov Tsvetnaya Metallurgiya (Proceedings of Higher Schools Nonferrous Metallurgy Pub Date : 2019-04-12 DOI:10.17073/0021-3438-2019-2-13-25

I. Komelin, A. P. Lysenko

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Abstract

The paper provides a review of the literature on the interaction of magnesium production salt melts with atmospheric air. The method for measuring the mass of reaction products of the molten salt with air is described. The results of investigation of hydrogen chloride and chlorine emission intensity by salt melts of MgCl 2 -KCl-NaCl, MgCl 2 -KCl-NaCl-BaCl 2 , MgCl 2 —KCl—NaCl—CaCl 2 systems, as well as the intensity of HCl + HBr and Cl 2 + Br 2 gas emission by MgCl 2 —KCl—NaCl—NaBr system salt melts are presented. Thermodynamic analysis of reactions of interaction of magnesium salt melts with atmospheric air is carried out. It is determined that magnesium chloride in salt melt interacts with atmospheric air most intensively with the release of chlorine and hydrogen chloride. Specific rates of halogen-containing gases formation per unit surface area of the MgCl 2 -KCl-NaCl, Mga 2 -KCl-NaCl-BaCl 2 , MgCl 2 -KCl-NaCl-CaCl 2 , MgCl 2 -KCl-NaCl-NaBr systems are measured. The influence of calcium chloride, sodium bromide and magnesium fluoride on the intensity of halogen-containing gases emission by the surface of salt melts is studied. It is found that the addition of magnesium fluoride in the composition of chloride melts reduces the intensity of chlorine and hydrogen chloride emission.

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Izvestiya Vuzov Tsvetnaya Metallurgiya (Proceedings of Higher Schools Nonferrous Metallurgy

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