Leach Residue Containing Lead
LEACH RESIDUE CONTAINING LEAD
Schedule source MSC.539(107), Annex 9, Appendix 1, IMSBC Code Amendment 07-23 · pages 289, 290
Description
Intermediate by-product formed as a result of the hydrometallurgical production of zinc and/or zinc compounds. Insoluble grey to brown granular substance obtained during dissolution of zinc ores or concentrate in sulphuric acid to produce zinc sulphate solutions after physical separation such as flotation and filtration.
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 IMSBC Code. Harmful if swallowed or inhaled. This cargo is corrosive to eyes and may cause long-term health effects. On heating (>1000°C), this cargo may release toxic and corrosive gases or vapours. This cargo is non-combustible or has a low fire risk.
Stowage and Segregation
“Separated from” foodstuffs and all class 8 acids.
Hold Cleanliness
Clean and dry as relevant to the hazards of the cargo.
Weather Precautions
When this cargo is carried in a ship other than a ship complying with the requirements in 7.3.2 of IMSBC 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 IMSBC 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. * Pursuant to 4.1.1.3 of IMSBC Code for UN 3077, class 9 cargoes, the “Class” box is left blank.
Loading
Trim in accordance with the relevant provisions required under sections 4 and 5 of IMSBC Code.
Precautions
Bilge wells shall be clean, dry and covered as appropriate, to prevent ingress of the cargo. Bilge covers shall not significantly degrade the capacity or operation of the bilge system. Bilges shall be sounded and pumped out, as necessary, throughout the voyage. Appropriate precautions shall be taken to protect machinery and accommodation spaces from the dust 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. During loading, carriage and discharging, welding or other hot work shall not be carried out in the vicinity of the cargo spaces containing this cargo.
Ventilation
No special requirements.
Carriage
Unless this material is carried in a ship complying with the requirements in 7.3.2 of IMSBC Code, the appearance of the surface of the cargo shall be checked regularly during the voyage. If free water above the cargo or fluid state of the cargo is observed during the voyage, the master shall take appropriate actions to prevent cargo shifting and potential capsize of the ship, and give consideration to seeking emergency entry into a place of refuge.
Discharge
Mechanisms are to be put in place to catch any material spilling from the cargo handling equipment into the water. Spillage onto the ship shall be cleaned up regularly.
Clean-up
After discharge of this cargo, the cargo spaces and the bilge wells shall be swept clean and then thoroughly washed out. All cargo residues are to be removed from the ship before sailing.
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