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Measurement of metal grade of ore particles in slurry using laser-induced breakdown spectroscopy

Measurement of metal grade of ore particles in slurry using laser-induced breakdown spectroscopy
Measurement of metal grade of ore particles in slurry using laser-induced breakdown spectroscopy
This paper describes experimental works to apply Laser-Induced Breakdown Spectroscopy (LIBS) for in-situ measurement of the metal grade of ore particles handled in seafloor mineral processing system for seafloor massive sulfides. LIBS measurements of ore particles containing metallic elements in slurry were performed, where ore slurry was circulated through a chamber mounted on the optical probe of a LIBS device. The chamber was positioned to set the focal point of laser from the LIBS device at the center of the tubular space in the chamber, where the slurry runs. Analytically useful LIBS spectra were obtained from the slurry with enough slurry concentration. While relatively strong LIBS signals assigned to major elements appeared in many spectra, sharp LIBS signals assigned to minor elements appeared in a spectrum. Individual ore particles are not homogeneous even though they are prepared from single ore. The results suggest that multiple measurements are required to assess the metal grade in the seafloor mineral processing system.
Nakajima, Yasuhara
d476d094-274e-4408-a92b-e1a657eea2c9
Yamamoto, Joji
815ce865-244b-454c-83a6-bf3f75e34a24
Takahashi, Tomoko
937057f6-8e83-4a7f-b11f-b549c94afdf6
Dodbiba, Gjergj
6543229d-2641-4e92-80a3-1cc17fc34eea
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Fujita, Toyohisa
a250bd64-e21f-4209-a7bf-307e9bdbc793
Nakajima, Yasuhara
d476d094-274e-4408-a92b-e1a657eea2c9
Yamamoto, Joji
815ce865-244b-454c-83a6-bf3f75e34a24
Takahashi, Tomoko
937057f6-8e83-4a7f-b11f-b549c94afdf6
Dodbiba, Gjergj
6543229d-2641-4e92-80a3-1cc17fc34eea
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Fujita, Toyohisa
a250bd64-e21f-4209-a7bf-307e9bdbc793

Nakajima, Yasuhara, Yamamoto, Joji, Takahashi, Tomoko, Dodbiba, Gjergj, Thornton, Blair and Fujita, Toyohisa (2018) Measurement of metal grade of ore particles in slurry using laser-induced breakdown spectroscopy. 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO), Kobe, Japan. 28 - 31 May 2018. 6 pp . (doi:10.1109/OCEANSKOBE.2018.8559349).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper describes experimental works to apply Laser-Induced Breakdown Spectroscopy (LIBS) for in-situ measurement of the metal grade of ore particles handled in seafloor mineral processing system for seafloor massive sulfides. LIBS measurements of ore particles containing metallic elements in slurry were performed, where ore slurry was circulated through a chamber mounted on the optical probe of a LIBS device. The chamber was positioned to set the focal point of laser from the LIBS device at the center of the tubular space in the chamber, where the slurry runs. Analytically useful LIBS spectra were obtained from the slurry with enough slurry concentration. While relatively strong LIBS signals assigned to major elements appeared in many spectra, sharp LIBS signals assigned to minor elements appeared in a spectrum. Individual ore particles are not homogeneous even though they are prepared from single ore. The results suggest that multiple measurements are required to assess the metal grade in the seafloor mineral processing system.

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Published date: May 2018
Venue - Dates: 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO), Kobe, Japan, 2018-05-28 - 2018-05-31

Identifiers

Local EPrints ID: 419304
URI: http://eprints.soton.ac.uk/id/eprint/419304
PURE UUID: f373e00b-1faa-4f8a-b2bd-575edb352f9f

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Date deposited: 10 Apr 2018 16:30
Last modified: 19 Jul 2019 17:22

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