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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Investigating the behaviour of PGEs during first-stage leaching of a Ni-Fe-Cu-S converter matte
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Investigating the behaviour of PGEs during first-stage leaching of a Ni-Fe-Cu-S converter matte

机译：在NI-FE-CU-S转换器哑光的第一阶段浸出过程中调查PGES的行为

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摘要

In a first-stage atmospheric leach in a Sherritt Ni-Cu matte leach process, a Ni-Cu-Fe-S Peirce-Smith converter matte is contacted with recycled aqueous copper sulphate/sulphuric acid solution (spent solution) with the purpose of dissolving nickel, while simultaneously removing copper (via metathesis and cementation reactions) from solution. While the iron content has been found to have a significant impact on the first-stage leach, a previously expected relationship between copper and PGM behaviour has not been established clearly. For this study, a converter matte consisting mainly of heazlewoodite (Ni_3S_2), chalcocite (Cu_2S), and awaruite (Ni_3Fe) was leached in a laboratory-scale batch reactor. The temperature, acid, and copper concentration under both oxidative and non-oxidative conditions were varied, while the copper, iron, and PGEs were tracked and the pH and Eh measured. Palladium was generally found to be closely related to the behaviour of copper, while platinum did not leach. The other platinum group metals such as iridium and rhodium were found to precipitate only with accelerated precipitation being observed during Fe precipitation reactions.
机译：在Sherritt Ni-Cu Matte浸出过程中的一级大气浸出中，与溶解的目的，与再生硫酸铜/硫酸溶液（花溶液）接触Ni-Cu-Fe-S Peirce-Smith转换器哑光镍，同时从溶液中同时除去铜（通过复分解和胶结反应）。虽然已经发现铁含量对第一阶段射击产生重大影响，但尚未明确建立先前预期的铜和PGM行为之间的关系。对于该研究，主要由Hezlewoodite（Ni_3S_2），Chalcocite（Cu_2S）和Awaruite（Ni_3Fe）组成的转换器遮罩在实验室批量批量反应器中浸出。在氧化和非氧化条件下的温度，酸和铜浓度变化，而跟踪铜，铁和钢沟，并测量pH和EH。钯通常被发现与铜的行为密切相关，而铂金没有浸出。发现其他铂族金属如铱和铑，仅在Fe沉淀反应期间观察到加速沉淀。

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