Products
Covering Agent
Cut heat loss from molten steel. Stop secondary oxidation dead.
A Covering Agent — also called a Hot Metal Ladle Covering Flux, Ladle Covering Flux or Tundish Covering Flux depending on where it is applied — is spread on the surface of molten steel to form a protective layer. Working together, three things happen: heat loss slows down, contact with air is blocked so secondary oxidation cannot take place, and non-metallic inclusions rising to the surface are absorbed into the slag layer.
ArcSteel produces Covering Agents in granular and powder form, formulated for three stages of the steelmaking route — the hot metal ladle, the steel ladle and the tundish. Because we manufacture in our own plant rather than reselling, the melting behaviour, bulk density and particle size distribution can be adjusted to match your furnace practice and the steel grades you cast.
If you are not sure which grade fits your line, we will run a trial batch and send our engineers to work through the results with you. That is the part most traders cannot offer.
By product form
- Grade
Granular Covering Agent
Free-flowing and low dust — suits both manual spreading and machine feeding.
- Grade
Powder Covering Agent
Melts faster and covers the bath surface more completely per unit weight.
By steelmaking stage
- Grade
Hot Metal Ladle Covering Flux
For hot metal ladles and torpedo cars — limits the temperature drop before charging into the converter.
- Grade
Ladle Covering Flux
Protects the bath from tapping through refining and ladle transport.
- Grade
Tundish Covering Flux
For continuous casting — insulates the tundish bath, absorbs inclusions and helps keep nozzle clogging under control.
What it does for your line
- Slower temperature drop — casting temperature stays consistent from ladle to tundish
- Blocks air contact so secondary oxidation and rephosphorisation are suppressed
- Absorbs non-metallic inclusions and helps them float out of the steel
- Reduces thermal shock on the refractory lining and extends ladle life
- Low dust and low fume — noticeably better conditions on the casting floor
- Formulation, melting range and packing customised to your plant
Technical data
| Carbon content | Three grades — carbon-free (C ≤ 3 %), low-carbon (C ≤ 8 %), general (C 8 – 25 %) |
|---|---|
| Particle form | Powder, solid granules or hollow granules — e.g. 0 – 1 mm |
| Melting point | Customised to your steel grade and casting temperature |
| Acidity / alkalinity | Customised to your slag system |
| Chemical composition | Al₂O₃ / SiO₂ / CaO / C — formulated to your steel grade, batch analysis supplied |
| Moisture | ≤ 5 % |
| Bulk density | 0.8 – 1.2 g/cm³ (grade dependent) |
| Shelf life | 12 months in dry storage |
Figures above are indicative. Contact us to confirm against your steel grades and furnace practice.
All grades can be customised — composition, particle size, melting behaviour, alkalinity and packaging are all adjustable. Send us your steel grade and furnace practice — we will recommend an existing grade or formulate one to suit.
Packing & delivery
- 10 kg woven PP bag with inner liner
- 1,000 kg jumbo bag (FIBC)
- Custom bag weight and private labelling available
- Palletised and shrink-wrapped for sea freight
Also known as: tundish flux · Hot Metal Ladle Covering Flux · Ladle Covering Flux · Tundish Covering Flux · insulating covering powder · slag conditioner
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Request a quote for Covering Agent
Tell us your monthly volume and destination port. We will quote with a packing option that suits the shipment.
Have us run a trial batch to your specification
Send us your specification or a sample of what you run now. We will formulate to match it and send a trial batch before you commit to volume.