Title:
レアアース泥の採泥方法及び環境負荷低減方法
Document Type and Number:
Japanese Patent JP7393751
Kind Code:
B2
Abstract:
A method for collecting rare earth sludge according to the present invention includes: (A) a step for forming a depression in the sea floor by excavating a layer under the sea floor which includes rare earth sludge, and causing a state in which a slurry including rare earth is contained in the depression; and (B) a step for injecting a replacement material, which has a higher density than the slurry, into the depression, the slurry being lifted by a sludge raising mechanism located above the depression in step (B). An environmental load reducing method according to the present invention prevents the formation of low-oxygen regions in the sea water in the depression by maintaining the state in which the depression is filled with the substitute material after step (B) in the abovementioned method for collecting rare earth sludge.
Inventors:
Keisuke Takahashi
Satoshi Akito
Yasuhiro Namba
Masanori Huh
Hidetaka Miyazaki
Keita Akiyama
Toshiro Yamanaka
Hiroko Makita
Satoshi Akito
Yasuhiro Namba
Masanori Huh
Hidetaka Miyazaki
Keita Akiyama
Toshiro Yamanaka
Hiroko Makita
Application Number:
JP2020033844A
Publication Date:
December 07, 2023
Filing Date:
February 28, 2020
Export Citation:
Assignee:
UBE Mitsubishi Cement Co., Ltd.
Japan Agency for Marine-Earth Science and Technology
Tokyo University of Marine Science and Technology
Japan Agency for Marine-Earth Science and Technology
Tokyo University of Marine Science and Technology
International Classes:
E21C50/00
Domestic Patent References:
| JP2003214082A | ||||
| JP2001241286A | ||||
| JP6653890B2 | ||||
| JP2014159710A | ||||
| JP61186695A | ||||
| JP56067095A |
Foreign References:
| US20110061872 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yasunori Ishizaka
Youhei Suzuki
Yasunori Ishizaka
Youhei Suzuki