Cryolite
Synthetic cryolite (Na₃AlF₆), fluorinated flux for aluminium.
View details Consumables · Chemicals & alloying
Fluxes and Demagging Agents
Cover, cleaning, drossing and demagging fluxes for aluminium melts
Overview
What it is and where it works
Salt-based fluxes added to molten aluminium to cover the bath, clean out oxides, separate metal from dross and clean furnace walls, plus demagging agents that lower magnesium content in Al-Si alloys and silicon metal. Formulation depends on alloy, temperature, scrap quality and addition method. We source by function and form (powder, granules or tablets).
- Flux functions
- Covering, cleaning, drossing, refining, wall cleaning
- Demagger action
- Sulfur or chlorine compounds react with Mg to form MgS or MgCl2 that separate from the melt; cryolite (Na3AlF6) used as flux in some grades
- Packaging
- Powder, granules or tablets; 25 to 50 kg bags or big bags
In your plant
Where It Is Used
- Melting and holding furnaces in foundries and die casters
- Secondary smelting of scrap and UBC
- Mg reduction in Al-Si alloys and silicon metal (Si ≥ 98 %)
- Wall cleaning to remove oxide build-up
To quote, we need
Send Us These Data Points
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Request a Quote Printable checklist to fill with your plant teamWe reply in English, Spanish, Italian or Chinese.
- Flux function (cover, cleaning, drossing, wall cleaning, demagging)
- Alloy and current and target Mg content
- Furnace type and bath temperature
- Addition method (manual, injection, rotary degasser)
- Form and packaging, monthly consumption
- Restrictions on chlorides or fluorides at your plant
One supplier, one shipment
Often Quoted Together
Need something different? We adapt sizes, materials and specs to your drawing.
Further reading
From Our Insights
Aluminum Degassing: Methods Compared and How to Check the Result
Read article
Aluminum Flux Guide: Cover, Cleaning, Drossing and Demagging
Read article
How to Reduce Aluminum Dross in Melting and Holding Furnaces
Read article
Cryolite in Aluminum Production: What It Does, Which Specs Matter and How to Source It
Read article Buyer questions
Frequently Asked Questions
What is the difference between cover and drossing flux?
Cover flux forms a layer that protects the bath from oxidation; drossing flux helps metal drain out of the dross so you skim less aluminium.
Are there emission concerns with demagging?
Yes. Chlorine-based demagging can release chlorine and aluminium chloride in the off-gas, so extraction and local regulations must be checked.
