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Awaruite (Ni3Fe), a new large nickel resource: Electrochemical characterization and surface composition under flotation-related conditions
Minerals Engineering ( IF 4.8 ) Pub Date : 2022-06-02 , DOI: 10.1016/j.mineng.2022.107656
Santiago Seiler, Gustavo Sánchez, Erika Teliz, Verónica Díaz, Peter Bradshaw, Bern Klein

Awaruite is a native nickel–iron alloy (Ni3Fe), found in serpentinized ultramafic rocks, that has gained interest as a possible source of nickel. FPX Nickel is advancing a very large awaruite deposit in central British Columbia, Canada, on which this work is based. To date there is limited information available regarding the flotation conditions to selectively concentrate awaruite from gangue minerals in serpentinite ores. The aim of this work was to investigate the floatability of awaruite in different solution conditions with a xanthate collector. Awaruite readily floated in acidic solution with a xanthate collector but not in neutral and alkaline solutions. Voltammograms on awaruite indicated that the alloy shows an active passive transition behaviour in acidic solution and passive behaviour in neutral and alkaline solutions. The passivation layer formed in neutral and alkaline solutions showed to inhibit the interaction between xanthate and awaruite surface. Infrared spectra on awaruite showed the presence of xanthate compounds attached to the surface in acidic condition at potentials higher than the reversible potential of xanthate/dixanthogen. Based on experimental results, it was postulated that xanthate chemisorbs on awaruite and then it oxidizes to form dixanthogen. Also, it was demonstrated that when passivated, awaruite quickly activates in acidic solution, good flotation performance was achieved with 10 min of conditioning, and similar performance was obtained after 30 min of conditioning. This work serves as a confirmation that is possible to float awaruite using xanthate, a well-known collector that offers selectivity over oxides and silicate minerals, which are the main gangue minerals in serpentinite ores.



中文翻译:

Awaruite (Ni3Fe),一种新的大型镍资源:浮选相关条件下的电化学表征和表面成分

Awaruite 是一种原生镍铁合金(Ni 3Fe),在蛇纹石化的超镁铁质岩石中发现,作为镍的可能来源引起了人们的兴趣。FPX Nickel 正在加拿大不列颠哥伦比亚省中部推进一个非常大的 arawite 矿床,这是这项工作的基础。迄今为止,关于从蛇纹石矿石中的脉石矿物中选择性地浓缩蛇尾石的浮选条件的可用信息有限。这项工作的目的是研究用黄药捕收剂在不同溶液条件下 awaruite 的可浮性。Awaruite 容易漂浮在带有黄药捕收剂的酸性溶液中,但不会在中性和碱性溶液中漂浮。awaruite的伏安图表明该合金在酸性溶液中表现出主动被动转变行为,在中性和碱性溶液中表现出被动行为。在中性和碱性溶液中形成的钝化层显示出抑制了黄药和珍珠岩表面之间的相互作用。awruite 的红外光谱显示,在酸性条件下,在高于黄药/双黄原的可逆电势的电势下,存在附着在表面的黄药化合物。根据实验结果,推测黄原酸盐化学吸附在珍珠岩上,然后氧化形成双黄原酸。此外,还表明,当钝化时,arawite 在酸性溶液中快速活化,调节 10 分钟即可获得良好的浮选性能,调节 30 分钟后可获得类似的性能。这项工作证实了使用黄原酸盐是一种可以对氧化物和硅酸盐矿物提供选择性的著名捕收剂,可以浮选 aaruite,

更新日期:2022-06-04
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