Key data
| Stowage factor | 0.34–0.45 m³/t (typical 0.38)12.0–15.9 ft³/t (typical 13.4) |
|---|---|
| Form | Bulk |
| IMSBC group | A Cargoes that may liquefy if shipped above their moisture limit. |
| BCSN | IRON ORE CONCENTRATE |
ft³/t values are per metric tonne (1 m³/t ≈ 35.31 ft³/t). Stowage factors are indicative — see note below.
Description
Iron ore concentrate is a fine, dense product of ore beneficiation, finer than natural fines and shipped to steelmakers. At around 0.38 m3/t it is a deadweight cargo. Unlike coarse iron ore it is a Group A cargo, its fine particle size making liquefaction the central concern.
Stowage & loading
Loading proceeds only with moisture content shown to be below the transportable moisture limit, supported by certificates and the master's checks, because the fine concentrate can liquefy when too wet. It is loaded by conveyor or grab with attention to tank-top strength and trim.
Hazards & handling
The fine particle size makes liquefaction the governing hazard: moisture above the TML lets the cargo flow and form a free surface that threatens stability. The concentrated weight can overstress the structure if poorly distributed, and the cargo is dusty when dry.
Carriage & discharge
The stow is monitored for moisture migration, free water and surface movement throughout, with conditions logged. Discharge is by grab from a stable face, with dust controlled when dry and the dense residue cleaned from holds on completion.
Key hazards
- Liquefaction if moisture exceeds the transportable moisture limit
- Free-surface formation and cargo shift threatening stability
- Structural overstress from concentrated weight
Loading precautions
- Confirm moisture is below the TML with certificates and checks
- Distribute the dense load to respect tank-top strength
- Monitor the stow for moisture migration and surface movement
Stowage factors are indicative and vary with grade, origin, moisture and packing. Always verify against the shipper's cargo declaration and the applicable IMSBC Code schedule before fixing or loading. This is general information, not professional or safety advice.