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1. (WO2017038148) MINERAL LIFTING SYSTEM AND MINERAL LIFTING METHOD

Pub. No.:    WO/2017/038148    International Application No.:    PCT/JP2016/061280
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Apr 07 01:59:59 CEST 2016
IPC: E21C 50/00
Applicants: NAGATA Tetsuzo
永田 徹三
NAKATANI Yutaka
中谷 穣
Inventors: NAGATA Tetsuzo
永田 徹三
NAKATANI Yutaka
中谷 穣
Title: MINERAL LIFTING SYSTEM AND MINERAL LIFTING METHOD
Abstract:
A mineral lifting system S comprises: a seabed work machine 13 comprising an excavator 131 to excavate minerals from the seabed, and a slurry pump 132 to suction and pump a solid-liquid mixture of minerals and seawater; a power generator to supply power by electrical power cables 12 to the seabed work machine 13; a main float 20; a mineral lifting pipe 21 to feed the solid-liquid mixture to the main float 20 side; an auxiliary float 22 that is mounted on the mineral lifting pipe 21 at required intervals to impart buoyancy; and a selecting unit 3 to select and collect minerals from the solid-liquid mixture transported to the main float 20 side.