Effect of pH and Precipitations on Copper-Molybdenum Rougher Flotation in Seawater

• 資料種別: 記事
• タイトル: Effect of pH and Precipitations on Copper-Molybdenum Rougher Flotation in Seawater
• 著者・編者: Yoshiyuki Tanaka; Hajime Miki; Gde Pandhe Wisnu Suyantara; Yuji Aoki; Hideyuki Okamoto; Kumika Ura; Tsuyoshi Hirajima
• 著者標目: Yoshiyuki Tanaka; Hajime Miki; Gde Pandhe Wisnu Suyantara; Yuji Aoki; Hideyuki Okamoto; Kumika Ura; Tsuyoshi Hirajima
• タイトル（掲載誌）: Materials transactions
• 巻号年月日等（掲載誌）: 64(6):2023.6
• 掲載巻: 64
• 掲載号: 6
• 掲載ページ: 1225-1231
• 掲載年月日（W3CDTF）: 2023-06
• ISSN（掲載誌）: 1345-9678
• ISSN-L（掲載誌）: 1345-9678
• 出版事項（掲載誌）: Sendai : The Japan Institute of Metals and Materials ; 2001-
• 出版地（国名コード）: JP
• 本文の言語コード: eng
• NDLC: ZP41
• 対象利用者: 一般
• 所蔵機関: 国立国会図書館
• 請求記号: Z53-J286
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 032853930; http://id.ndl.go.jp/bib/032853930
• 整理区分コード: 632

• 要約等: <p>Effect of pH and precipitations on copper–molybdenum ore rougher flotation has been investigated in seawater with flotation experiments followed by precipitation estimation with thermodynamic calculations, turbidity measurements and XRD analysis. Results of flotation experiments in seawater indicated that the effect of pH on copper and molybdenum flotation maximum recovery seems limited. On the other hand, pH drastically influences copper and molybdenum flotation kinetic constant, it decreased a lot with increasing pH, and results of pH 8.5 and 9.0 is quite similar. From thermodynamic calculation, precipitation effect on seawater less than pH 9 seems limited since CaCO₃ and Mg(OH)₂ does not exist on this pH region. To estimate precipitation on pH in seawater, turbidity measurements were carried out with controlled pH and results indicated even pH is less than 9, noticeable turbidity can be seen. To confirm precipitation in seawater, precipitation was collected from controlled pH seawater solution. XRD analysis of precipitation indicated that obtained precipitation at pH 8.7 is CaCO₃, CaSO₄ and Mg(OH)₂. This result is not same as the result of thermodynamic calculation and it might be due to the activity coefficient and ionic strength effect. Although flotation kinetic is influenced with turbidity, turbidity influence on maximum recovery is limited. Effect of kinetic might be due to that precipitation exist as suspension and it prevent bubble and mineral attachments. Small effect of precipitation on maximum recovery might be due to exist of few precipitation on the surface of copper and molybdenum mineral since most of mineral in rougher flotation is gangue minerals and also most of precipitations might be on gangue minerals. These results indicated that seawater flotation have to take into account of precipitation effect more for flotation kinetic than maximum flotation recovery.</p>
• DOI: 10.2320/matertrans.m-m2023805; https://doi.org/10.2320/matertrans.m-m2023805
• 関連情報（URI）: http://id.ndl.go.jp/bib/032853930; https://ndlsearch.ndl.go.jp/books/R000000004-I032853930; https://www.jstage.jst.go.jp/article/matertrans/64/6/64_M-M2023805/_pdf
• 参照: Effect of Mg2+ and Ca2+ as divalent seawater cations on the floatability of molybdenite and chalcopyrite; https://cir.nii.ac.jp/crid/1360283691055102464; Floatability of molybdenite and chalcopyrite in artificial seawater; https://cir.nii.ac.jp/crid/1360565166031829376; Flotation rate measurements to optimize an operating circuit; https://cir.nii.ac.jp/crid/1360861295364772480; The use of seawater as process water at Las Luces copper–molybdenum beneficiation plant in Taltal (Chile); https://cir.nii.ac.jp/crid/1361981469350360960; The effect of saline water on mineral flotation – A critical review; https://cir.nii.ac.jp/crid/1362544420049885184; Copper–molybdenum ores flotation in sea water: Floatability and frothability; https://cir.nii.ac.jp/crid/1363388843947437056; Effect of Seawater on Sulfide Ore Flotation: A Review; https://cir.nii.ac.jp/crid/1363670319434412160
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; 科学研究費助成事業データベース; https://kaken.nii.ac.jp/ja
• 書誌ID（NDLBibID）: 032853930; http://id.ndl.go.jp/bib/032853930