Blanketing molten non-ferrous metals and alloys with fluoride gases having reduced global warming potential

摘要

An improved method of processing a molten non-ferrous metal and alloys of said metal using a blanketing gas having a global warming potential is provided. The improvement involves reducing said global warming potential of said blanketing gas by blanketing said molten non-ferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of SO₂F₂, NF₃, SO₂CLF, SOF₂, SOF₄, NOF and SF₄.