陽(yáng)離子脅迫下低品位硫化鎳礦的氧化浸出行為(英文)
發(fā)布時(shí)間:2021-11-26 21:30
本文模擬研究了鎂離子和鈉離子脅迫對(duì)低品位硫化鎳礦氧化浸出的影響。主要研究陽(yáng)離子對(duì)有價(jià)值金屬的浸出效率的影響以及含鎳硫化礦石的電化學(xué)氧化行為。浸出試驗(yàn)結(jié)果表明,部分含鎂脈石和含亞鐵硫化物會(huì)優(yōu)先溶解在浸出液中,浸出過(guò)程中Ni和Cu的浸出效率下降與Mg2+的浸出濃度增加相關(guān)性較大。電化學(xué)研究結(jié)果表明,低品位硫化鎳礦的氧化浸出受中間產(chǎn)物氧化擴(kuò)散的控制。Mg2+和Na+影響Fe3+/Fe2+電對(duì)和含硫物質(zhì)的轉(zhuǎn)化,這些陽(yáng)離子易受硫化礦物表面陰離子吸引并定向粘附在金屬硫化物表面荷負(fù)電的活性位點(diǎn),從而增加界面電子轉(zhuǎn)移的電化學(xué)活性,促進(jìn)礦石與浸出介質(zhì)之間的電子轉(zhuǎn)移。通過(guò)比較Mg2+和Na+的作用,發(fā)現(xiàn)Mg2+通過(guò)促成致密鈍化膜的形成,降低了金屬礦物的浸出效率,對(duì)反應(yīng)中間產(chǎn)物的氧化擴(kuò)散不利,而Na+的不利影響往往是與優(yōu)先被浸出的Mg2+和Fe3+協(xié)同作用引起。
【文章來(lái)源】:Journal of Central South University. 2020,27(11)EISCICSCD
【文章頁(yè)數(shù)】:12 頁(yè)
【文章目錄】:
1 Introduction
2 Experimental
2.1 Materials
2.2 Oxidative leaching performance tests
2.3 Electrode and electrochemical measurements
3 Results and discussion
3.1 Mg2+and Na+stress on Ni,Cu,Fe,Mg leaching efficiencies
3.2 Mg2+and Na+stress on oxidation leaching reactions
3.3 Mg2+and Na+stress on oxidation leaching rate
3.4 Mg2+and Na+stress on oxidation leaching impedance
3.5 Mg2+and Na+stress on characterization of leaching residues
3.6 Roles of Mg2+and Na+in nickel sulfide ores oxidation leaching
4 Conclusions
Contributors
Conflict of interest
【參考文獻(xiàn)】:
期刊論文
[1]中國(guó)有色金屬礦產(chǎn)勘查70年進(jìn)展[J]. 戴塔根,潘君慶,張德賢. 中國(guó)有色金屬學(xué)報(bào). 2019(09)
[2]Mechanism of Mg2+ dissolution from olivine and serpentine: Implication for bioleaching of high-magnesium nickel sulfide ore at elevated pH[J]. Jian-zhi Sun,Jian-kang Wen,Bo-wei Chen,Biao Wu. International Journal of Minerals Metallurgy and Materials. 2019(09)
[3]黃銅礦浸出:強(qiáng)調(diào)銅離子和鐵離子的作用(英文)[J]. 楊聰仁,焦芬,覃文慶. Journal of Central South University. 2018(10)
[4]鎳礦濕法冶金技術(shù)應(yīng)用進(jìn)展及研究展望[J]. 孫建之,陳勃偉,溫建康,王淀佐. 中國(guó)有色金屬學(xué)報(bào). 2018(02)
[5]Regional tectonics,geology,magma chamber processes and mineralisation of the Jinchuan nickel-copper-PGE deposit,Gansu Province,China:A review[J]. T.M.(Mike) Porter. Geoscience Frontiers. 2016(03)
[6]鎳黃鐵礦電化學(xué)生物氧化過(guò)程的分解機(jī)理(英文)[J]. 李宏煦,李超,張祉倩. Transactions of Nonferrous Metals Society of China. 2012(03)
本文編號(hào):3520957
【文章來(lái)源】:Journal of Central South University. 2020,27(11)EISCICSCD
【文章頁(yè)數(shù)】:12 頁(yè)
【文章目錄】:
1 Introduction
2 Experimental
2.1 Materials
2.2 Oxidative leaching performance tests
2.3 Electrode and electrochemical measurements
3 Results and discussion
3.1 Mg2+and Na+stress on Ni,Cu,Fe,Mg leaching efficiencies
3.2 Mg2+and Na+stress on oxidation leaching reactions
3.3 Mg2+and Na+stress on oxidation leaching rate
3.4 Mg2+and Na+stress on oxidation leaching impedance
3.5 Mg2+and Na+stress on characterization of leaching residues
3.6 Roles of Mg2+and Na+in nickel sulfide ores oxidation leaching
4 Conclusions
Contributors
Conflict of interest
【參考文獻(xiàn)】:
期刊論文
[1]中國(guó)有色金屬礦產(chǎn)勘查70年進(jìn)展[J]. 戴塔根,潘君慶,張德賢. 中國(guó)有色金屬學(xué)報(bào). 2019(09)
[2]Mechanism of Mg2+ dissolution from olivine and serpentine: Implication for bioleaching of high-magnesium nickel sulfide ore at elevated pH[J]. Jian-zhi Sun,Jian-kang Wen,Bo-wei Chen,Biao Wu. International Journal of Minerals Metallurgy and Materials. 2019(09)
[3]黃銅礦浸出:強(qiáng)調(diào)銅離子和鐵離子的作用(英文)[J]. 楊聰仁,焦芬,覃文慶. Journal of Central South University. 2018(10)
[4]鎳礦濕法冶金技術(shù)應(yīng)用進(jìn)展及研究展望[J]. 孫建之,陳勃偉,溫建康,王淀佐. 中國(guó)有色金屬學(xué)報(bào). 2018(02)
[5]Regional tectonics,geology,magma chamber processes and mineralisation of the Jinchuan nickel-copper-PGE deposit,Gansu Province,China:A review[J]. T.M.(Mike) Porter. Geoscience Frontiers. 2016(03)
[6]鎳黃鐵礦電化學(xué)生物氧化過(guò)程的分解機(jī)理(英文)[J]. 李宏煦,李超,張祉倩. Transactions of Nonferrous Metals Society of China. 2012(03)
本文編號(hào):3520957
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