Refining molten nonferrous metals and alloys with gases having reduced global warming potential

摘要

An improved method of processing both primary and secondary nonferrous metal and alloys of said metals using a refining gas having a global warming potential is provided. The improvement involves reducing said global warming potential of said refining gas by refining said non-ferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of CIF3, CIF, COF2, F3COF, CF2(OF)2, SO2F2, NF3, SO2CIF, SOF2, SOF4, NOF, F2 and SF4.