Innovation with Low-Ionization Plasma Sources for Enhanced Aluminum Processing
About 32 million tons of aluminum is melted every year. A significant amount is lost to dross during primary and secondary melting operations. Typically, to overcome the dross loss, either a nitrogen cover or a chemical cover is used over the molten metal. A new method, that uses a cover of low-ionization air, has proven to be effective in significantly reducing the dross. The method, low-ionization plasma melting, and its impact on the environment and on melting energy efficiency are discussed in relation to some of the other historical innovations for aluminum processing.
J. A. Sekhar and J. P. Dismukes
G.S. Reddy et al., "Innovation with Low-Ionization Plasma Sources for Enhanced Aluminum Processing", Key Engineering Materials, Vol. 380, pp. 209-225, 2008