Key data
| Stowage factor | 0.28–0.40 m³/t (typical 0.33)9.9–14.1 ft³/t (typical 11.7) |
|---|---|
| Form | Bulk |
| IMSBC group | A Cargoes that may liquefy if shipped above their moisture limit. |
| BCSN | LEAD CONCENTRATE |
ft³/t values are per metric tonne (1 m³/t ≈ 35.31 ft³/t). Stowage factors are indicative — see note below.
Description
Lead concentrate is a fine, very dense flotation product shipped to smelters. At around 0.33 m3/t it is strongly deadweight-limited. It carries the concentrate liquefaction risk if too wet, and stands out for toxicity: lead-bearing dust is a genuine health hazard for those handling it.
Stowage & loading
Loading proceeds only with moisture below the transportable moisture limit, backed by certificates and checks, since wet concentrate can liquefy. The heavy cargo is loaded by grab or conveyor with care for tank-top strength, and dust is minimised from the outset given its toxicity.
Hazards & handling
Two hazards stand together: liquefaction above the TML, which lets the cargo flow and shift, and the toxicity of lead dust, which demands respiratory protection, hygiene and control of contamination. The concentrated weight can also overstress the structure if poorly distributed.
Carriage & discharge
The stow is monitored for moisture migration and surface movement, with conditions logged. Discharge is by grab from a stable face; toxic dust is strictly controlled, personnel hygiene is enforced, and the lead-bearing residue is cleaned carefully and disposed of properly.
Key hazards
- Liquefaction if moisture exceeds the transportable moisture limit
- Toxic lead-bearing dust posing a health hazard
- Structural overstress from concentrated weight
Loading precautions
- Confirm moisture is below the TML with certificates and checks
- Enforce strict dust control, respiratory protection and hygiene
- Distribute the dense load to respect tank-top strength
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.