Description
Dust to fines, calcined pyrites is the residual product from the chemical
industry where all types of metal sulphides are either used for the production of
sulphuric acid or are processed to recover the elemental metals – copper, lead, zinc,
etc. The acidity of the residue can be considerable, in particular, in the presence of
water or moist air, where pH values between 1.3 and 2.1 are frequently noted.
Characteristics
| Physical properties
|
| Size
|
Angle of
repose
|
Bulk density
(kg/m3)
|
Stowage factor
(m3/t)
|
| Not
applicable
|
Not
applicable
|
2,326
|
0.43
|
| Hazard classification
|
| Class
|
Subsidiary
hazard(s)
|
MHB
|
Group
|
| Not
applicable
|
Not
applicable
|
TX
and/or CR
|
A and
B
|
Hazard
Highly corrosive to steel when wet. Inhalation of dust is irritating and
harmful. This cargo may liquefy if shipped at a moisture content in excess of its
transportable moisture limit (TML). See sections 7 and 8 of this Code.
This cargo is non-combustible or has a low fire risk.
Stowage and segregation
"Separated from" foodstuffs.
Hold cleanliness
Due consideration shall be given to cleaning and drying of the cargo
spaces.
Weather precautions
This cargo shall be kept as dry as practicable before loading, during
loading and during voyage. This cargo shall not be loaded during precipitation. During
loading of this cargo, all non-working hatches of the cargo spaces to which this cargo
is loaded, or to be loaded, shall be closed.
Loading
Trim in accordance with the relevant provisions required under sections 4
and 5 of this Code.
As the density of the cargo is extremely high, the tank top may be
overstressed unless the cargo is evenly spread across the tank top to equalize the
weight distribution. Due consideration shall be given to ensure that the tank top is not
overstressed during the voyage and during loading by a pile of the cargo.
Precautions
Bilge wells shall be clean, dry and covered as appropriate, to prevent
ingress of the cargo. Ceiling boards shall be removed or sealed to prevent penetration
by this cargo. The tank top on which this cargo is to be loaded shall be covered with
protective coating such as lime-wash before loading to avoid any potential corrosive
reaction between the cargo, water and steel. Appropriate precautions shall be taken to
protect machinery and accommodation spaces from the dust of the cargo. Bilge wells of
the cargo spaces shall be protected from ingress of the cargo. Due consideration shall
be given to protect equipment from the dust of the cargo. Persons who may be exposed to
the dust of the cargo shall wear goggles or other equivalent dust eye-protection and
dust filter masks. Those persons shall wear protective clothing, as necessary.
Ventilation
No special requirements.
Carriage
After the completion of loading of this cargo, the hatches of the cargo
spaces shall be sealed to prevent water ingress, as necessary.
Discharge
No special requirements.
Clean-up
No special requirements.
Emergency procedures
| Special emergency equipment to
be carried
|
| Nil
|
| Emergency
procedures
|
| Nil
|
| Emergency action in the event
of fire
|
| Nil (non-combustible).
|
| Medical first aid
|
| Refer to the Medical First Aid
Guide (MFAG), as amended.
|