Skip to main content
Air Liquide in the value chain

Melting and casting

We supply industrial gases to ferrous and non-ferrous foundries for casting applications, including tundish inerting, caster shrouding, shell casting, investment casting and sand casting. Air Liquide’s patented (Expanding Gas Air Liquide (EGAL)  process uses liquid cryogenics, argon or nitrogen, to reduce interactions between molten metal and atmospheric gases such as oxygen, nitrogen and water vapor during air melting operations. This SPAL technology allows steel manufacturers to produce castings with fewer defects, enhanced mechanical properties and lower rejects.

Air Liquide offers SPAL, our technology family of inert blanketing processes. These patented processes include EGAL, Surface Backfilling Air Liquide (SBAL), and Vapor Ring Air Liquide (VRAL). Contact us to learn more about these patented processes.