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Keywords: nodule
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Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-1182
... Abstract Ocean consists of rich mineral resources of polymetallic nodules which lies in deep sea bed at a depth of 5000-6000 m water depth. The polymetallic ores are in the size ranges from 3-7 cm in Central Indian Ocean Basin (CIOB) with various distribution in shape and size, size reduction...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1109
...ABSTRACT ABSTRACT Mining of polymetallic nodules from the oceans, found in mineable abundance and mineral quality on the abyssal plain of the oceans at depths of 4000–6000 m, has found renewed interest with the growing demand for cobalt, nickel, copper and REEs. The harvested nodules...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1111
... particle material in the vertical pipe. Xia et al. (1997) founded a calculating model to predict and optimize the hydraulic lifting parameters of a manganese nodule mining system. production monitoring hydraulic fracturing production control artificial intelligence concentration reservoir...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1108
...ABSTRACT ABSTRACT Nodule pick-up methods used in hydraulic collecting for deep sea mining have significant effects on pick-up efficiency and environmental disturbance. In this paper, three kinds of nodule pick-up methods are investigated and compared in the differences between collecting...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-474
... xenophyophore ccz metals & mining intermediate-size nodule fauna examination filament morphology richness polymetallic nodule bottom surface nodule shipboard observation mat nodule fauna fauna clarion-clipperton zone foraminifera gooday morphospecy large-size nodule fauna...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-296
... reference data for the pilot test and the commercial realization. The hydrodynamic resistance of skips obtained from single skip test can explore the main composition of water resistance. INTRODUCTION Polymetallic nodules are found on the deep-seabed of oceans worldwide. With the decrease of land...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-693
... are the accurate positioning together with the acquisition of related geological and physicochemical parameters, and in-situ and intact ferromanganese samples for analyses. During the dives we observed wide-spread and mostly continuous cover of hydrogenetic ferromanganese crust deposits (crusts and nodules...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-711
... scales. We discuss here the parameters controlling the variability. KEY WORDS: Ferromanganese, crust, nodule, hydrogenetic, seamount, northwestern Pacific, geology INTRODUCTION We have observed the occurrence of the ferromanganese oxide deposits in the Northwestern Pacific basins, and described...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-169
... A preliminary study of the relation between topographic features and the distribution of polymetallic nodules in Japanese License Area, Central Pacific Keisuke Nishi, Akira Koizumi, Akira Tsune, and Soichiro Tanaka Deep Ocean Resources Development Co., Ltd. (DORD) Chuoh-ku, Tokyo, Japan ABSTRACT...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-706
... ABSTRACT Article presents the methodology for operational research on the polymetallic nodules mining value chain and the assessment of crucial factors influencing its feasibility. Value chain has been analyzed and boundary assumptions having a substantial influence on the decision making...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-334
... as empirical equations using dimensionless quantities. INTRODUCTION The world's growing economy demands more mineral extracted from the ocean. This demand requires the development of the deep-ocean mining technology. Polymetallic nodules are deposited over the ocean floor at water depth of 4,000~6,000 m...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-117
... Abstract For continuously-taken seafloor photographs of polymetallic nodule, automatic procedures of image processing and subsequent treatment of a vast amount of data have been developed for estimating parameters representing distribution of polymetallic nodules such as sizes, numbers...
Proceedings Papers

Paper presented at the The Eighteenth International Offshore and Polar Engineering Conference, July 6–11, 2008
Paper Number: ISOPE-I-08-113
... ABSTRACT Experiments have been performed to study the differences of the flow characteristics between real and artificial manganese nodules-water mixture and synthetic nodules-water. The results show that the hydraulic gradients of the mixtures were almost identical in the case of both...
Proceedings Papers

Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-105
... mining project, by which manganese nodules are conveyed from the seafloor to the mining ship (Yoon et al., 2001; Chung, 2003). Most of the system is located wider the sea level, which demands its stability and durability more than anything else because of the difficulty in repairing. Also, economical...
Proceedings Papers

Paper presented at the The Fifteenth International Offshore and Polar Engineering Conference, June 19–24, 2005
Paper Number: ISOPE-I-05-065
... ABSTRACT The lifting technology plays a key role for nodule recovery from deep-sea bed. KIGAM (Korea Institute of Geoscience and Mineral Resources) has striven to develop the technology, and recently performs 30 meter scale on-land lifting experiments. In the study, we present the solid-liquid...
Proceedings Papers

Paper presented at the The Fourteenth International Offshore and Polar Engineering Conference, May 23–28, 2004
Paper Number: ISOPE-I-04-059
... on the basis of the small scale hydraulic pumping experiments. In the pumping system, lifting pipe of 100 mm in diameter and synthetic nodules of 20 mm are used. From the experiments that cover the maximum mixture velocity of 5 m/s, it is confirmed that the larger the velocity and the concentration...
Proceedings Papers

Paper presented at the The Twelfth International Offshore and Polar Engineering Conference, May 26–31, 2002
Paper Number: ISOPE-I-02-068
... Cobalt-rich manganese crusts on seamounts and manganese nodules on deep ocean floor have both received attention as future resources for Co, Ni, Cu, and Mn. Lack of information on cobalt-rich manganese crusts has precluded comparisons between the two sources in terms of their technical and economical...
Proceedings Papers

Paper presented at the The Twelfth International Offshore and Polar Engineering Conference, May 26–31, 2002
Paper Number: ISOPE-I-02-071
... system, which plays the role of minimizing the influence of the twist or vibration from the lifting pipe as well as of guaranteeing the free motion of the miner and transferring the manganese nodules and sea water. The shape of the flexible pipe where manganese nodules and sea water flow together...
Proceedings Papers

Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-079
...- Clipperton Fracture Zones, where is one of dense manganese nodule areas in the Pacific, in 1994 for impact assessment on seafloor environment. In order to quantify the resedimentation, an image analysis technique of the seafloor photographs was developed. Subsequent artificial disturbances on seafloor were...
Proceedings Papers

Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-445
... ABSTRACT In 1993 China Ocean Mineral Resources R&D Association (COMRA) become the fifth registered pioneer investor. Our country has the rights for surveying and trial exploitation of ocean multi-metallic nodules in this area for later decade. In-order to exploit and survey the seabed...

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