Presentation (PDF) - US Environmental Protection Agency

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Without Proper Protection, Molten Magnesium Will Evaporate and Burn Due to its high vapor pressure, magnesium will evaporate from an unprotected molten magnesium surface In an atmosphere of air/oxygen, magnesium vapor will react or burn, forming oxides This reaction will generate heat and thereby increase the evaporation, thus accelerating the burning Oxygen Oxygen Mg Vapor Magnesium Burning Liquid Magnesium Heat
History of Magnesium Melt Protection A US patent from 1934 cited several gases, including SF 6 , BF 3 , and SO 2 A combination of salt-based fluxes and SO 2 was commonly used until the introduction of SF 6 R&D in the late 60's and 70's formed the basis for using SF 6 as melt protection in magnesium melting and casting During the late 70's and 80's most producers and die casters adopted SF 6 in production SF 6 was considered a major improvement for the working environment in the magnesium industry, since SO 2 is both toxic and corrosive ,
Page 1: Handling and Use of Sulfur Dioxide
Page 5 and 6: Using SO 2 for Melt Protection Prov
Page 7 and 8: Using SO 2 for Melt Protection Prov
Page 9 and 10: Casting of Ingots Requires Melt Sur
Page 11 and 12: Hydro Magnesium Plants Are Replacin
Page 13 and 14: Hydro Magnesium Plants Are Replacin
Page 15 and 16: Magnesium Diecasting Requires Prote
Page 17 and 18: Gas Mixing Unit Add your symbols he
Page 19 and 20: Design Data for Gas Distribution Di
Page 21 and 22: Cost Impact SF 6 vs. SO 2 Number of
Page 23 and 24: Local Impact - Health & Safety Sulf

Presentation (PDF) - US Environmental Protection Agency

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