Specialists in Aluminum Die Casting

FLUXES – MOLTEN ALUMINUM CLEANER

Excessive smoke during fluxing? Use Schaefer fluxes!

Fluxing is a critical step in aluminum melting and die-casting operations. It plays an important role in cleaning molten aluminum, removing non-metallic inclusions, reducing dissolved hydrogen, and improving overall metal quality. However, one common operational challenge faced by many foundries is excessive smoke during the fluxing process, a problem that affects safety, visibility, environmental compliance, and operator comfort.

 

What causes excessive smoke during fluxing?
The primary cause is the use of exothermic, nitrate-based flux chemistry. Traditional exothermic fluxes often contain nitrates or oxidizing agents that react violently when introduced into molten aluminum. This reaction releases a large amount of heat and gas in a very short time, resulting in:

  • Dense white or brown smoke
  • Sudden flare-ups or splashing
  • Increased airborne particulates
  • Wet, sticky dross formation
  • Higher metal oxidation and loss

 

What are the advantages of non-exothermic flux chemistry?

  • Minimal smoke generation
  • No violent reactions or flare-ups
  • Improved operator visibility and safety
  • Formation of dry, free-flowing dross
  • Reduced aluminum oxidation and metal loss
  • More stable and predictable fluxing performance

 

Schaefer fluxes as the solution!

Schaefer has developed a range of fluoride-based, non-exothermic fluxes specifically engineered to address excessive smoke issues without compromising cleaning efficiency.

  • Effectively remove oxides and inclusions
  • Reduce hydrogen content in molten aluminum
  • Operate without nitrates, eliminating violent reactions
  • Produce low smoke and dry dross
  • Improve overall melt cleanliness and yield

 

By reducing smoke during fluxing, it impacts worker’s health and safety, environmental compliance, furnace cleanliness, metal recovery and cost efficiency. For expert guidance and product recommendations tailored to your operation, contact PT Wilisindomas Indahmakmur.

Read more


Product Brand

Open chat