Fluxing is an essential step in aluminium melting and die-casting processes. It plays a major role in cleaning molten aluminium, removing non-metallic inclusions, reducing dissolved hydrogen content, and improving overall metal quality. However, one of the most common operational challenges faced by many foundries is excessive smoke generation during the fluxing process, which can negatively impact safety, visibility, environmental compliance, and operator comfort.
The primary cause is the use of nitrate-based exothermic fluxes. Conventional exothermic fluxes typically contain nitrates or oxidizing agents that react aggressively when introduced into molten aluminium. This reaction releases heat and gas rapidly, resulting in:
Schaefer has developed a range of fluoride-based non-exothermic fluxes specifically designed to eliminate excessive smoke issues without compromising cleaning efficiency.
With reduced smoke generation during the fluxing process, the benefits are highly significant for worker health and safety, environmental compliance, furnace cleanliness, metal recovery, and overall cost efficiency.
For technical guidance and product recommendations tailored to your operation, please contact PT Wilisindomas Indahmakmur
