Flotation of Seafloor Massive Sulfide Ores: Combination of Surface Cleaning and Deactivation of Lead-Activated Sphalerite to Improve the Separation Efficiency of Chalcopyrite and Sphalerite

Aikawa, Kosei; Ito, Mayumi; Kusano, Atsuhiro; Park, Ilhwan; Oki, Tatsuya; Takahashi, Tatsuru; Furuya, Hisatoshi; Hiroyoshi, Naoki

Flotation of Seafloor Massive Sulfide Ores: Combination of Surface Cleaning and Deactivation of Lead-Activated Sphalerite to Improve the Separation Efficiency of Chalcopyrite and Sphalerite

Aikawa, Kosei; Ito, Mayumi; Kusano, Atsuhiro et al.

Metals, 2021, 11(2), 253

Permalink : https://hdl.handle.net/2115/81171

このアイテムのアクセス数:482件（2026-08-19 06:13 集計）

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アクセス権	open access
URI	https://hdl.handle.net/2115/81171
タイトル	Flotation of Seafloor Massive Sulfide Ores: Combination of Surface Cleaning and Deactivation of Lead-Activated Sphalerite to Improve the Separation Efficiency of Chalcopyrite and Sphalerite
著者	Aikawa, Kosei ; Ito, Mayumi ; Kusano, Atsuhiro ; Park, Ilhwan ; Oki, Tatsuya ; Takahashi, Tatsuru ; Furuya, Hisatoshi ; Hiroyoshi, Naoki
著者名 Aikawa, Kosei
e-Rad_Researcher 10339690 著者名 Ito, Mayumi
著者名 Kusano, Atsuhiro
e-Rad_Researcher 80844753 著者名 Park, Ilhwan
著者名 Oki, Tatsuya
著者名 Takahashi, Tatsuru
著者名 Furuya, Hisatoshi
e-Rad_Researcher 50250486 著者名 Hiroyoshi, Naoki
言語	英語
キーワード	seafloor massive sulfide
	flotation
	lead-activated sphalerite
	anglesite
	EDTA
発行日	2021-02
出版者	MDPI
収録物名	Metals
巻(号)	11(2)
ページ	253
抄録	The purpose of this study is to propose the flotation procedure of seafloor massive sulfide (SMS) ores to separate chalcopyrite and galena as froth and sphalerite, pyrite, and other gangue minerals as tailings, which is currently facing difficulties due to the presence of water-soluble compounds. The obtained SMS ore sample contains CuFeS2, ZnS, FeS2, SiO2, and BaSO4 in addition to PbS and PbSO4 as Pb minerals. Soluble compounds releasing Pb, Zn2+, Pb2+, and Fe2+/3+ are also contained. When anglesite co-exists, lead activation of sphalerite occurred, and thus sphalerite was recovered together with chalcopyrite as froth. To remove soluble compounds (e.g., anglesite) that have detrimental effects on the separation efficiency of chalcopyrite and sphalerite, surface cleaning pretreatment using ethylene diamine tetra acetic acid (EDTA) was applied before flotation. Although most of anglesite were removed and the recovery of chalcopyrite was improved from 19% to 81% at 20 g/t potassium amyl xanthate (KAX) after EDTA washing, the floatability of sphalerite was not suppressed. When zinc sulfate was used as a depressant for sphalerite after EDTA washing, the separation efficiency of chalcopyrite and sphalerite was improved due to deactivation of lead-activated sphalerite by zinc sulfate. The proposed flotation procedure of SMS ores-a combination of surface cleaning with EDTA to remove anglesite and the depression of lead-activated sphalerite by using zinc sulfate-could achieve the highest separation efficiency of chalcopyrite and sphalerite; that is, at 200 g/t KAX, the recoveries of chalcopyrite and sphalerite were 86% and 17%, respectively.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/met11020253