These Pyroflux formulations are a light grey powder blend of KCl and anhydrous MgCl₂ produced as a cover and refining flux for in-furnace metal treatment. (NOTE: the 6535 blend works best as a refining flux vs a cover flux.)

Pyroflux melts on the surface of the metal bath where the temperature is over the melting point of the blend. As it melts it forms a liquid and continuous film that efficiently prevents the aluminium and alloying elements from reacting with humidity and generating hydrogen pick-up and oxides accordingly. Once the Pyroflux becomes liquid it can be stirred into the melt to remove alkalis such as Na, Li and Ca as well as non-metallic inclusions.

Advantages

• Replaces covering fluxes that contain NaCl
• Replaces chlorine furnace fluxing
• Sodium-free, calcium-free and fluorinefree
• Reduces melt loss
• Does not contaminate the AA5000 series alloys with alkalis
• Removes alkalis and non-metallic inclusions when stirred into the melt
• Low application