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2020 Fiscal Year Final Research Report

development of micro fine powder electrode electrochemistry for advanced hydrometallurgy

Research Project

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Project/Area Number 19K22156
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 31:Nuclear engineering, earth resources engineering, energy engineering, and related fields
Research InstitutionKyushu University

Principal Investigator

MIKI HAJIME  九州大学, 工学研究院, 准教授 (10706386)

Project Period (FY) 2019-06-28 – 2021-03-31
Keywords超微量粉末電極 / 湿式精錬 / 浮遊選別 / ガルバニック電流測定 / インピーダンス分析
Outline of Final Research Achievements

as new electrochemical technique, super micro powder electrode method has been developed and its characteristics were investigated. this new powder electrode indicates much higher sensitivity and reproducibility compared with conventional massive and mix powder electrodes methods. various minerals such as chalcopyrite, chalcocite, bornite, enargite, tennantite electrodes has been investigated and quantitative analysis and characteristics can be carried out. also application to flotation and hydrometallurgy has been done with quantitative estimation of oxidation and reduction reaction, galvanic current measurements and impedance analysis. these results were presented with various international conference, scientific journal and thesis.

Free Research Field

鉱物処理

Academic Significance and Societal Importance of the Research Achievements

本研究で確立された超微量粉末電極は、簡便かつ再現性と感度が高く、反応が定量的に評価できるため、鉱物ごとに新しい挙動が得られるなど、貴重な成果が得られている。これらの鉱物が混合した精鉱試料において本法を利用したところ、単独鉱物のボルタモグラムの合計とおおよそ一致し、混合鉱物の定量分析にも応用できた。これまではMLA分析など、時間とコストのかかる方法を使用していたが、この方法は代替法として価値がある。本法の浮遊選別および湿式精錬法への応用として、鉱物表面の酸化還元反応の定量を、ガルバニック電流の測定、インピーダンス分析などを用いて行った。これらは電気化学的手法の新しい可能性を示すものである。

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Published: 2022-01-27  

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