Aluminum & Metal Calcium Remover – Non-Ferrous Safe

Understanding Aluminum Alloy Calcium Removers

The aluminum alloy calcium remover is essential in refining aluminum alloys, ensuring optimal performance by removing excessive calcium. This process is crucial for aluminum-silicon alloys where excess calcium can impair alloy properties.

Main Ingredients of Calcium Removers

• Sodium Fluoride (NaF): Reacts with calcium to form calcium fluoride.
• Cryolite (Na₃AlF₆): Lowers the decalcification melting point and assists the reaction.
• Sodium Chloride (NaCl): Improves the fluidity and consistency of reactions.
• Calcium Fluoride (CaF₂): Enhances slag fluidity, aiding separation.

Auxiliary Ingredients for Enhanced Effectiveness

• Sodium Nitrate (NaNO₃): Oxidizes impurities, reducing smoke.
• Graphite Powder: Enhances spreadability and reaction efficiency.

Functionality of Each Ingredient

• Sodium Fluoride: Initiates the primary reaction to form CaF₂, isolating calcium as slag.
• Cryolite: Lowers melting points and accelerates reactions.
• Sodium Chloride: Facilitates consistent fluidity and reaction uniformity.
• Calcium Fluoride: Aids in forming easily removable slag.
• Sodium Nitrate: Minimizes smoke by oxidizing impurities.
• Graphite Powder: Boosts the reaction efficiency and spreadability of the decalcifier.

Principle of Decalcification

The decalcification process relies on chemical reactions to separate and remove calcium from aluminum melts, primarily through:

• Sodium Fluoride Reaction: The reaction with calcium results in floating CaF₂, forming a removable slag.
• Auxiliary Reactions: Cryolite and sodium nitrate enhance scum formation and impurity oxidation, facilitating a cleaner process.

Effective Usage Instructions

For optimal decalcification results:

• Preheat: Heat the decalcifier to 100-150°C to eliminate moisture.
• Addition: Evenly distribute the decalcifier on the melt surface or integrate it directly.
• Stirring: Gently stir to ensure complete contact with the melt.
• Reaction: Allow the mixture to react and form slag, which rises for easy removal.