Metal Sulphide Concentrates, Corrosive UN 1759 (see Also Mineral Concentrates Schedule)
METAL SULPHIDE CONCENTRATES, CORROSIVE UN 1759 (see also Mineral concentrates schedule)
Schedule source MSC.539(107), Annex 9, Appendix 1, IMSBC Code Amendment 07-23 · pages 321, 322, 323
Description
Mineral concentrates are refined ores in which the valuable components have been enriched by eliminating the bulk of waste materials. Generally, the particle size is small, although agglomerates sometimes exist in concentrates which have not been freshly produced. The most common concentrates in this category are: zinc concentrates, lead concentrates, copper concentrates and low grade middling concentrates.
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. Some sulphide concentrates are liable to oxidation and may have a tendency to self-heat, with associated oxygen depletion and emission of toxic fumes. Moisture in the cargo will form sulphurous acid which is corrosive to steel. Some metal sulphide concentrates may have acute and long term health effects.
Stowage and Segregation
Unless determined by the competent authority, segregation as required for class 4.2 and class 8 materials. “Separated from” foodstuffs.
Hold Cleanliness
Clean and dry as relevant to the hazards of the cargo.
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;
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