BAUXITE FINES
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Statutory Documents - IMO Publications and Documents - International Codes - IMSBC Code – International Maritime Solid Bulk Cargoes Code – Resolution MSC.268(85) - Appendix 1 – Individual Schedules of Solid Bulk Cargoes - BAUXITE FINES

BAUXITE FINES

 The provisions of this schedule shall apply to bauxite cargoes containing both:

  • .1 more than 30% of fine particles less than 1 mm (D30 < 1 mm); and

  • .2 more than 40% of particles less than 2.5 mm (D40 < 2.5 mm).

Notwithstanding the above provision, Bauxite cargo meeting the above criterion may be carried as a group C cargo in accordance with the provisions of the individual schedule for BAUXITE where the shipper provides the master with a certificate, in accordance with the result of the test approved by the competent authority of the port of loading,footnote stating that the moisture of the cargo freely drains from the cargo so that the degree of saturation is not liable to reach 70%.

Description

A reddish-brown to brownish-yellow clay-like and earthy mineral. Insoluble in water.

Characteristics

Physical properties
Size Angle of repose Bulk density (kg/m3) Stowage factor (m3/t)
More than 30% of fine particles less than 1 mm and more than 40% of particles less than 2.5 mm Not applicable 1,100 to 2,000 0.50 to 0.91
Hazard classification
Class Subsidiary hazard(s) MHB Group
Not applicable Not applicable Not applicable A

Hazard

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 may suffer instability due to moisture content resulting in dynamic separation and formation of a liquid slurry (water and fine solids) above the solid material, resulting in a free surface effect which may significantly affect the ship's stability. This cargo is not liable to undergo dynamic separation when the cargo is shipped below its TML.

This cargo is non-combustible or has a low fire risk.

Stowage and segregation

No special requirements.

Hold cleanliness

No special requirements.

Weather precautions

When a cargo is carried in a ship other than a ship complying with the requirements in 7.3.2 of this Code, the following provisions shall be complied with:

  • .1 the moisture content of the cargo shall be kept less than its TML during loading operations and the voyage;

  • .2 unless expressly provided otherwise in this individual schedule, the cargo shall not be handled during precipitation;

  • .3 unless expressly provided otherwise in this individual schedule, during handling of the cargo, all non-working hatches of the cargo spaces into which the cargo is loaded, or to be loaded, shall be closed;

  • .4 the cargo may be handled during precipitation under the conditions stated in the procedures required in 4.3.3 of this Code; and

  • .5 the cargo in a cargo space may be discharged during precipitation provided that the total amount of the cargo in the cargo space is to be discharged in the port.

Loading

Trim in accordance with the relevant provisions required under sections 4 and 5 of this Code.

When the stowage factor of this cargo is equal to or less than 0.56 m3/t, 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. The bilge system of a cargo space to which this cargo is to be loaded shall be tested to ensure it is working.

Ventilation

No special requirements.

Carriage

The appearance of the surface of this cargo shall be checked regularly, including at least daily visual inspections where condition permits, during the voyage. If free water or a liquid slurry above the cargo or fluid state of the cargo is observed, including the flattening of the cargo, during voyage, the master shall take appropriate actions to prevent cargo shifting, loss of stability due to free surface effect and potential capsize of the ship, and give consideration to seeking emergency entry into a place of refuge. Cargo hold bilges shall be sounded at regular intervals and pumped out, as necessary.

An atypical motion of the ship (wobbling) may also be indicative of cargo instability and the master shall consider appropriate action.

Discharge

No special requirements.

Clean-up

No special requirements.

Parent topic: Appendix 1 – Individual Schedules of Solid Bulk Cargoes
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