ST 1060 DO
A 60–63% silicon carbide deoxidizer for stable melting of carbon steel and ductile iron.
ST-1060-DO is a 60–63% silicon carbide (SiC) deoxidizer for balanced deoxidation in standard steel and ductile-iron production. It offers more reliable oxygen control than the 40% grade while keeping material cost low.
What it is
What ST 1060 DO Is & Where It Is Used
ST 1060 DO is a 60–63% silicon carbide composite deoxidizer. With higher SiC and lower silica than the 40% grade, it gives more stable deoxidation and better melt stabilization across standard steel production.
It is used in cupola, BOF, and EAF routes for carbon steel and ductile iron, where consistent oxygen control and smooth melting are required without moving to high-purity grades.
Deoxidation Mechanism
Deoxidation Mechanism
ST 1060 DO follows the same deoxidation principle as the rest of the range:
SiC + 3[O] → SiO₂ + CO↑. The reaction drives oxygen from the metal into the slag and sustains a reducing atmosphere. The exothermic step raises bath temperature.
At 60–63% SiC the impurity load (silica ~25 ± 2%, free carbon 3.5 ± 2%) is moderate, giving a good balance of deoxidation performance and cost for standard grades.
Key Advantages
Key Advantages
ST 1060 DO is chosen where stable melting practice matters more than absolute purity:
Balanced deoxidation
Stable oxygen control and melt stabilization for standard steel and ductile iron.
Lower impurity load
Less silica and free carbon than the 40% grade, easing slag control.
Process stability
Reduces variation in tapping and refining, supporting repeatable quality.
Cost-effective
Sits in the mid-range of the family — more performance than 40% at a fraction of high-purity cost.
Multi-furnace use
Suits cupola, BOF, and EAF routes without grade change.
Technical Specifications
Technical & Physical Specifications
Typical chemical and physical values for ST 1060 DO.
Typical chemical composition
| Item | Typical value |
|---|---|
| Grade | Sic60 |
| SiC | 60.0–63.0% |
| Free Carbon | 3.5 ± 2% |
| SiO₂ | 25 ± 2% |
| Sulfur | < 0.3% |
| Moisture (H₂O) | < 1.0% |
Physical characteristics
| Property | Value |
|---|---|
| Crystal structure | Hexagonal α-SiC |
| Mohs hardness | 9.2–9.5 |
| Microhardness | 2840–3320 kg/mm² |
| Theoretical density | 3.20–3.25 g/cm³ |
| Bulk density | 1.2–1.6 g/cm³ |
| Particle size | 0–5 mm, 0–10 mm |
Usage
Application Process Parameters
Add 3–6 kg per ton of steel. For ladle pre-deoxidation, charge 20–30% of the total to the ladle bottom before tapping, then add the remainder into the steel stream via a chute as tapping reaches roughly one-third of ladle capacity, completing within 30 seconds before tapping ends.
In EAF reduction, skim part of the oxidized slag, add a small amount of carbon powder, then add the SiC deoxidizer in one or several batches. The slag turns white within about 5 minutes; maintain the reducing atmosphere with further small additions.
Store dry, separate from other materials. Supplied in moisture-proof bags; custom sizes and ton-bag formats available.
Applications
Applications
Carbon steel
Standard deoxidation during tapping and refining of carbon steel.
Ductile iron
Stable melting and oxygen control for ductile-iron production.
Cupola / BOF / EAF
One grade across multiple furnace types, simplifying inventory.
FAQ
ST 1060 DO — Frequently Asked Questions
A 60–63% SiC deoxidizer for balanced, stable deoxidation in carbon steel and ductile iron across cupola, BOF, and EAF routes.
It carries higher SiC (60–63% vs 40–42%) and lower silica, giving more reliable oxygen control and melt stabilization at modest extra cost.
3–6 kg per ton of steel, split between ladle-bottom pre-deoxidation and stream addition during tapping.
Yes. After skimming part of the oxidized slag and adding carbon powder, charge the SiC deoxidizer in batches; the slag whitens in about 5 minutes.
0–5 mm and 0–10 mm as standard, with other sizes available on request.
Dry and separate from other materials, in moisture-proof bags; custom sizes and ton bags on request.
