Granulated Flux Low-Dust Aluminum Treatment Flux
The same salt chemistry, without the cloud. Powder flux works, but it dusts every time it is scooped, clogs furnace filters and blows off the surface before it reacts. Granulated flux carries the same chloride and fluoride chemistry in granules that pour cleanly, feed through injection equipment and stay where they are put, so less of it does the same job.
Chelora Chemicals is a granulated flux supplier and sourcing partner serving foundries, die casters and casthouses across the United States. We match the grade to your alloy and to how you add it — by hand or by injection — with a batch COA and SDS on every consignment.
- Product type
- Granular treatment flux
- Base salts
- Chlorides with fluoride additions
- Form
- Granules
- Granule size
- Per grade; injection grades sized to feed
- Function
- Cleaning · drossing · inclusion removal
- Grades
- Standard · sodium-free
- Application
- Manual addition or flux injection
- Packaging
- Moisture-barrier bags or drums
- Documentation
- Batch COA & SDS
Note: tell us how you add it. Granules for hand addition and granules for injection equipment are sized differently. A grade that feeds well by hand can bridge or pack in a feeder.
How granular flux cleans the melt
Granules reach the melt intact, melt and react where they are placed, rather than dusting off first.
Why it matters: flux that blows away does nothing. Granules put more of what you buy into the melt, which is why addition rates can come down
What granulated flux is and does
Granulated flux is a salt-based aluminum treatment flux supplied as granules rather than fine powder. The chemistry is the familiar one: a chloride base, usually sodium and potassium chloride, with fluoride additions that strip and gather oxide. What changes is the physical form, and with it the dust, the fume and how the flux can be applied.
It is used for cleaning, drossing and inclusion removal. Added to the melt by hand, or fed through injection equipment so it is dispersed below the surface, the flux wets oxide films and other non-metallics, carries them into the dross, and lets aluminum trapped in that dross drain back into the bath. Because the granules do not dust off, less flux is needed for the same effect.
Why foundries move from powder to granules
- Less dust. Granules do not cloud when scooped or poured, at the furnace or in the store.
- Lower addition rates. More of the flux reaches the melt instead of blowing off it.
- Feeds through equipment. Sized granules suit flux injection and dosing units.
- Same chemistry choices. Standard and sodium-free grades, as with cover flux.
Handling character
Granulated flux must go onto or into the melt dry. Damp flux on molten aluminum is a steam eruption hazard. Details in the Safety section.
| Parameter | Typical value |
|---|---|
| Base salts | Chlorides, ratio per grade |
| Fluoride content | Per agreed specification |
| Sodium | Standard or sodium-free grade |
| Granule size | Per grade and application method |
| Fines | Low fines per agreed limit |
| Moisture | Per grade specification — kept low |
Important: the figures above are indicative of commercial material and are offered for planning only. The batch certificate of analysis is the governing document.
| Property | Value |
|---|---|
| Physical form | Granules |
| Base system | Chloride salts with fluorides |
| NaCl–KCl minimum melting point | ≈ 660 °C |
| With NaF | Ternary eutectic ≈ 607 °C |
| Dust | Low compared with powder grades |
| Hygroscopic | Yes — store sealed |
| Application | Manual or injection |
Melting points are reference values for the salt systems these fluxes are built on. Granule size, composition and fluoride level are grade-specific and stated on the producer's COA; injection grades are sized to the feeding equipment. Treat the table as orientation, not as a specification.
Where granulated flux does its work
Melt cleaning and drossing in foundries, die casting and casthouses.
Furnace cleaning & drossing
Melting and holding furnaces where oxide and inclusions must be gathered and the dross dried before skimming.
- Grade matched to melt temperature
- Drier, lower-metal dross
- Dosing guidance shared
Flux injection
Granules fed below the melt surface through injection or dosing equipment, often alongside rotary degassing.
- Injection-sized granules
- Low fines to avoid packing
- Feeder compatibility checked
Die casting
Holding furnaces and ladles ahead of the cell, where cleaner metal means fewer inclusion rejects.
- Low-dust handling
- Sodium-free options
- Batch traceability
Shop-floor dust reduction
Plants moving off powder flux to cut dust at the furnace and in the store.
- Like-for-like trial
- Same chemistry, new form
- SDS with every batch
Magnesium-bearing & high-Si alloys
Sodium-free granular grades for alloys where sodium causes embrittlement or interferes with refinement.
- Sodium-free grades
- Alloy reviewed before quoting
- COA per batch
Scheduled supply
Flux is consumed every shift, so steady call-off supply matters more than spot price.
- Annual contracts with call-off
- Price held across the contract
- Second source held in reserve
Delivered to US plants and ports
We ship granulated flux to nominated delivery points across the United States. The regions below are destinations we serve — Chelora Chemicals is a sourcing and supply partner, not a US manufacturer, and does not hold US stock.
Gulf Coast
The largest US chemical cluster, and the usual entry point for bulk consignments.
- Houston & Galveston, TX
- New Orleans & Baton Rouge, LA
- Mobile, AL
Northeast
Container and bulk delivery into the mid-Atlantic and New England manufacturing belt.
- Newark & Elizabeth, NJ
- Philadelphia, PA
- Boston, MA
Southeast
Port-side delivery for the Carolinas, Georgia and Florida processing plants.
- Savannah, GA
- Charleston, SC
- Jacksonville, FL & Norfolk, VA
Midwest & Great Lakes
Inland rail and truck forwarding from the nearest coastal port to the industrial Midwest.
- Chicago, IL
- Detroit, MI
- Cleveland & Columbus, OH
West Coast
Pacific routing for West Coast processors and formulators.
- Los Angeles & Long Beach, CA
- Oakland, CA
- Seattle & Tacoma, WA
Southwest & Mountain
Inland delivery to interior states, forwarded from the Gulf or Pacific gateway.
- Dallas–Fort Worth, TX
- Phoenix, AZ
- Denver, CO
Importing into the United States
Granulated flux is a chemical mixture, so TSCA looks at each component rather than the product name. Under TSCA section 13 the importer of record, or its authorized agent, must certify to US Customs and Border Protection that each shipment either complies with TSCA or is not subject to it. We confirm the Inventory status of every component with the producer and agree in writing who files that certification before the first consignment moves.
Which party carries that duty follows the Incoterm. On FOB, CFR or CIF terms it is usually the US buyer; on DDP terms it can be the seller or its agent. Safety data sheets and labels are supplied to OSHA's updated Hazard Communication Standard, and the grade-specific transport transport documentation is prepared before booking.
| Item | How it works |
|---|---|
| Delivery points | Any nominated US plant, terminal or port of discharge |
| Incoterms quoted | FOB · CFR · CIF · DDP |
| Importer of record | Agreed in writing before the first shipment |
| TSCA certification | Section 13 positive certification filed at entry |
| Documentation | Batch COA, SDS, packing list, certificate of origin |
| Pack formats | 25 kg bags, drums or bulk bags |
Note: regional coverage describes where we deliver, not where we hold inventory. Lead time depends on producer scheduling and ocean transit to your nominated US port — we confirm both in the quotation.
How we supply granulated flux
Chelora Chemicals is a granulated flux supplier and sourcing partner, not a manufacturer. We place your order with a qualified producer whose grade fits your alloy, your furnace and your application method.
The form question comes first. Hand-added granules and injection granules are not interchangeable: injection equipment needs a controlled size range and low fines, or the flux bridges and packs in the feeder. Tell us what you add it with and we will specify accordingly.
Then the chemistry, exactly as for any aluminum flux: the alloy decides whether sodium is acceptable, and the amount of oxide you are dealing with decides how much fluoride the grade should carry.
- Granule size matched to your method. Hand addition or injection equipment, specified accordingly.
- Low fines on injection grades. Fines are what cause bridging and packing in feeders.
- Alloy reviewed before quoting. Sodium-free grades where the alloy needs them.
- Moisture-barrier packaging. Salt fluxes are hygroscopic and damp flux is a hazard.
- Trial packs before a contract. Compare addition rate and dross against your current powder.
- Batch traceability to the producing plant. Full chain of custody documentation on request.
Bagged, drummed or in bulk
Moisture-barrier bags, lined drums or bulk bags, all with full documentation.
25 kg moisture-barrier bags
Poly-lined bags, the standard unit for granular flux.
Lined drums
Lined, resealable drums where flux is used from the container at the furnace.
500–1,000 kg bulk bags
Bulk bags for feeding injection equipment at high volume.
Small trial quantities
Small packs to compare against your current flux.
Incoterms to suit you
Quoted on the Incoterm your purchasing team works to.
Scheduled deliveries
Annual volume released against your melt schedule.
Less dust, same molten-metal rules
Granulation cuts dust, but it does not change the chemistry or the setting. The hazards that matter most are moisture — damp flux on molten aluminum can erupt — and fume evolved at melt temperature. Fluoride-bearing grades carry their own toxicity classification. The summary below is orientation only; the safety data sheet supplied with your batch is the authoritative document.
Classified hazards
Cl⁻Chloride salt base: irritating to eyes; dust irritates the respiratory tract.F⁻Fluoride-bearing grades: harmful or toxic if swallowed; classification depends on fluoride content.FumeFumes are evolved at melt temperature: use local exhaust ventilation at the furnace.H₂OMoisture in flux contacting molten aluminum can cause violent steam eruption.SDSThe GHS classification is grade-specific and set out in the batch SDS.
The US air rule worth knowing. EPA's secondary aluminum NESHAP, 40 CFR Part 63 Subpart RRR, defines reactive fluxing as any gas, liquid or solid flux, other than cover flux, that results in a hazardous air pollutant emission, and it defines cover flux as salt added to the melt surface without surface agitation to prevent oxidation. Foundries, die casters and extruders melting only clean charge, customer returns or internal scrap are outside the definition of a secondary aluminum production facility. Whether your fluxing practice brings you inside the rule is a determination for you and your permitting authority; we supply the composition data you need to make it.
Storage
Store in sealed original packaging in a dry, covered area, off the floor and away from food and feedstuffs. Salt fluxes are hygroscopic: reseal part-used containers immediately, because flux that has picked up moisture both performs worse and creates a steam hazard when it meets molten metal. Rotate stock first in, first out.
Handling
Handle with gloves, eye protection and dust control, and apply only with dry, preheated tools. Never add damp or cold material to a melt. Fumes evolve at melt temperature, so furnace-side local exhaust ventilation is appropriate. Follow the exposure controls set out in the batch SDS and your own foundry safety program.
Transport
Most chloride-based fluxes ship as non-dangerous goods, but that is a grade-level question, not a product-name one: fluoride content can bring a formulation into a toxic or environmentally hazardous class. We confirm and document the classification for your specific grade, packaging and destination before booking.
Every batch, documented
We verify documentation before dispatch so there are no surprises at your incoming-goods bench.
Specification agreed
Alloy family, melt temperature, application method and the grade chemistry confirmed against your process before the order is placed.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS, TSCA position and transport classification checked by our desk before the shipment is booked.
Traceable dispatch
Each shipment is traceable to its producing batch, with full chain-of-custody records on request.
Why granule size decides the grade
Powder and granular fluxes can share a recipe. The difference is what happens between the bag and the melt. Fine powder dusts when handled, is lifted by furnace draft and burner gases, and loads up extraction filters. Granules fall where they are aimed and melt in place, which is why producers quote lower addition rates for granular grades doing the same job.
Size also decides how the flux can be applied. Flux injection and dosing equipment meter granules through a feeder and disperse them below the melt surface, often through the same rotor used for degassing. For that to work, the granules need a controlled size range and few fines; injection grades are commonly sized at around 1 to 3 mm for exactly this reason.
So the first thing to settle on a granular flux order is the application method, and only then the chemistry. A hand-added grade with a broad size range can be perfectly good at the furnace door and a constant blockage in a feeder.
We do not publish operating process parameters here; this is background only. Full technical documentation accompanies every shipment, and any process-specific detail you need is best confirmed directly with our technical desk.
| Product family | Aluminum treatment flux, granular |
|---|---|
| Base salts | Chlorides with fluoride additions |
| Function | Cleaning, drossing, inclusion removal |
| Application | Manual addition or flux injection |
| Advantage over powder | Less dust; lower addition rates |
| Grades | Standard · sodium-free |
Related foundry & melt-treatment products
Other aluminum melt-treatment inputs supplied from the same desk.
Granulated flux, answered
What is granulated flux?
What is granulated flux used for?
Is granulated flux better than powder flux?
Can granulated flux be used with flux injection?
How do I choose the right grade?
How much granulated flux should I add?
Does fluxing fall under EPA's secondary aluminum rule?
Is granulated flux hazardous?
How should granulated flux be stored?
Do you manufacture granulated flux?
Get a quote on granulated flux
Tell us your alloy, your furnace, how you add flux today and how much you use per melt. We will match a granular grade to your method and quote a trial pack so you can compare addition rate and dross against your current flux.