Seafloor Massive Sulfides (SMSs), which are formed by precipitates from hydrothermal fluids vented from seafloor, have been expected as one of mineral resources to be developed. The authors have proposed the concept of seafloor mineral processing for SMS mining, where valuable minerals contained in SMS ores are separated on seafloor. To apply a ball mill to the grinding unit for seafloor mineral processing, grinding experiments were carried out using a small-scale ball mill applicable to high-pressure condition. In the experiments, wet grinding and water-filled grinding of size-classified silica sands were carried out at three rotation rates to compare the grinding performance in both cases. In both cases, the silica sands were finely ground. The measurement of particle size of samples from the experiments showed that water-filled grinding had comparable grinding performance to wet grinding while the suitable rotation rate for water-filled grinding shifted to higher than that for wet grinding. This result suggests the possibility of water-filled grinding for seafloor mineral processing. If water-filled grinding can be employed for the grinding unit, the structure of the grinding unit would be simplified in comparison with wet grinding that leads to the saving of grinding costs.
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ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
June 9–14, 2013
Nantes, France
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5535-5
PROCEEDINGS PAPER
Study on Grinding Technology for Seafloor Mineral Processing
Yasuharu Nakajima
,
Yasuharu Nakajima
National Maritime Research Institute, Mitaka, Tokyo, Japan
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Joji Yamamoto
,
Joji Yamamoto
National Maritime Research Institute, Mitaka, Tokyo, Japan
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Shigeo Kanada
,
Shigeo Kanada
National Maritime Research Institute, Mitaka, Tokyo, Japan
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Sotaro Masanobu
,
Sotaro Masanobu
National Maritime Research Institute, Mitaka, Tokyo, Japan
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Ichihiko Takahashi
,
Ichihiko Takahashi
National Maritime Research Institute, Mitaka, Tokyo, Japan
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Katsunori Okaya
,
Katsunori Okaya
The University of Tokyo, Tokyo, Japan
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Seiji Matsuo
,
Seiji Matsuo
The University of Tokyo, Tokyo, Japan
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Tomohiko Fukushima
,
Tomohiko Fukushima
The University of Tokyo, Tokyo, Japan
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Toyohisa Fujita
Toyohisa Fujita
The University of Tokyo, Tokyo, Japan
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Yasuharu Nakajima
National Maritime Research Institute, Mitaka, Tokyo, Japan
Joji Yamamoto
National Maritime Research Institute, Mitaka, Tokyo, Japan
Shigeo Kanada
National Maritime Research Institute, Mitaka, Tokyo, Japan
Sotaro Masanobu
National Maritime Research Institute, Mitaka, Tokyo, Japan
Ichihiko Takahashi
National Maritime Research Institute, Mitaka, Tokyo, Japan
Katsunori Okaya
The University of Tokyo, Tokyo, Japan
Seiji Matsuo
The University of Tokyo, Tokyo, Japan
Tomohiko Fukushima
The University of Tokyo, Tokyo, Japan
Toyohisa Fujita
The University of Tokyo, Tokyo, Japan
Paper No:
OMAE2013-10756, V003T05A015; 6 pages
Published Online:
November 26, 2013
Citation
Nakajima, Y, Yamamoto, J, Kanada, S, Masanobu, S, Takahashi, I, Okaya, K, Matsuo, S, Fukushima, T, & Fujita, T. "Study on Grinding Technology for Seafloor Mineral Processing." Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Materials Technology; Ocean Space Utilization. Nantes, France. June 9–14, 2013. V003T05A015. ASME. https://doi.org/10.1115/OMAE2013-10756
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