Full-scale experiments on a coandă-effect-based polymetallic-nodule collector

S.M.S. Alhaddad, Laurens de Jonge, W.B.A. Boomsma, R.L.J. Helmons

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Abstract

Polymetallic nodules are potato-sized rock accretions that form on vast areas of the abyssal plains of the global ocean. These nodules are rich in commercially precious metals, such as nickel, cobalt and copper, making them a target for potential future deep-sea exploitation. Generally, polymetallic nodules are partially buried in the seabed sediment, which is predominantly composed of clay. Among the existing mechanisms for mining polymetallic nodules (mechanical, hydraulic and hybrid), hydraulic collecting is deemed the most suitable technology in deep sea mining. This is primarily because hydraulic collecting hardly involves interaction with the seabed during the collection process (Agarwal et al., 2012); the collector generates a pressure gradient to harvest the nodules, thus substantially reducing the associated disturbance to the seabed.
Original languageEnglish
Title of host publicationProceedings of the World Dredging Conference, WODCON XXIII
Subtitle of host publicationDredging is Changing
PublisherWODA
Number of pages2
Publication statusPublished - 2022
EventWODCON XXIII - Tivoli Hotel, Copenhagen, Denmark
Duration: 16 May 202220 May 2022

Conference

ConferenceWODCON XXIII
Country/TerritoryDenmark
CityCopenhagen
Period16/05/2220/05/22

Keywords

  • deep sea mining
  • polymetallic nodules
  • nodule pick-up device
  • hydraulic collector
  • Coandă effect

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