Passivated Mg granules 0.2-1.6mm, active Mg 92-98%, certified ignition and reactivity per lot. Co-injection blends and cored-wire feedstock. Annual contract supply, DG compliant.
QUICK ANSWER
Magnesium powder for desulfurization is passivated, sized magnesium granules (typically 0.2-1.6 mm, or finer milled grades) injected into hot metal and steel to remove sulfur — the most efficient desulfurizing agent in ferrous metallurgy. Every high-quality steel grade passes through desulfurization, and magnesium's unmatched sulfur affinity makes it the standard reagent in modern steel plants worldwide.
The process is violent and precise: magnesium injected into 1300-1500 °C hot metal vaporizes instantly, and the Mg vapor reacts sulfur into MgS that floats into slag. Passivation — a controlled surface coating on each granule — delays ignition just enough for safe pneumatic transport and controlled reaction; reactivity is the product's core specification, certified as ignition temperature and reaction curve. Steel plants buy on consistent reactivity, granulometry, and active magnesium content, because injection lance performance and desulfurization endpoint depend on every kilogram behaving identically. Co-injection blends with lime and CaC₂ round out the product family.
MATERIAL DATA
Lot-level controls focus on the chemistry, particle characteristics, and process values that influence manufacturing consistency and finished-part performance.
| Element | Content | Performance Role |
|---|---|---|
| Active magnesium (Mg) | > 92-98 wt% | The desulfurizing value — certified per lot |
| Passivation layer | Salt/oxide coating 2-8% | Ignition delay for safe transport and controlled reaction |
| Particle size | 0.2-1.6 mm standard; 0-0.5 mm fine grades | Matches injection lance and process design |
| Moisture | < 0.1 wt% | Safety-critical — dry specification |
| Ignition temperature | Certified per grade | Reactivity consistency for lance performance |
Final limits can be aligned with the agreed purchase specification.
APPLICATIONS
Steel plant desulfurization is the market: hot metal from blast furnaces carries sulfur that must drop below 0.005-0.010% for quality flat products, pipeline steels, and automotive grades — and magnesium injection is the fastest, most complete removal route. Integrated mills worldwide run Mg injection stations; they buy passivated magnesium under annual contracts with strict reactivity certification, because a slow lot under-desulfurizes (grade downgrades) and a hot lot risks lance flare-ups (safety incidents). The product is consumable, specification-locked, and repurchased continuously.
Adjacent demand includes ductile iron desulfurization and modification, chemical Grignard and reduction processes (finer Mg powders and turnings), pyrotechnics and flares (where controlled, and noting we do not serve restricted end-uses), and magnesium granule metallurgy. The cored-wire format — magnesium or CaSi wire fed into ladles — shares the same supply base and often the same buyers.
NON-FERROUS BASE METAL POWDERS
CUSTOM SUPPLY
We supply passivated desulfurization magnesium in standard and custom granulometries with certified active Mg, ignition temperature, and reactivity curves per lot, plus Mg-CaO co-injection blends and cored-wire feedstock. Consistent reactivity across annual contract volumes, DG-compliant packaging and documentation, and technical support for injection parameter optimization are standard. Not export-controlled.
We supply passivated desulfurization magnesium in standard and custom granulometries with certified active Mg, ignition temperature, and reactivity curves per lot, plus Mg-CaO co-injection blends and cored-wire feedstock.
Consistent reactivity across annual contract volumes, DG-compliant packaging and documentation, and technical support for injection parameter optimization are standard.
MATERIAL COMPARISON
| Comparison Point | This Product | CaO or CaC2 |
|---|---|---|
| Desulfurization efficiency | Highest — deepest S removal | Moderate (CaO), high (CaC2) |
| Reaction speed | Fast — minutes | Slower |
| Slag volume | Low | High — disposal cost |
| Temperature loss | Minimal | Significant |
| Cost per tonne treated | Higher reagent, lower total | Lower reagent, higher process cost |
| Best use | Deep desulfurization, quality grades | Bulk pre-treatment, cost-first |
TECHNICAL FAQ
Need a different chemistry, particle range, or processing route? Our material team can review the requirement and supply window.
Each granule carries a thin salt/oxide coating that raises ignition temperature and slows reaction onset — enough for safe pneumatic transport and controlled lance reaction. We certify ignition temperature per lot; moisture control in storage remains essential.
Standard 0.2-1.6 mm (16-100 mesh) fits most lances; fine grades for co-injection blends. Send your lance diameter and carrier gas parameters — we match the cut.
92-98% depending on passivation level, certified per lot. Dosing calculations use active content, so consistency here directly stabilizes your endpoint sulfur.
Dry, sealed, away from water and ignition sources — original sealed drums in ventilated storage. Moisture contact generates hydrogen; our packaging and documentation follow DG regulations for safe handling.
No. Magnesium desulfurization products ship without licensing requirements; DG transport rules apply and are handled by us.
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