Evaluating the sulphidisation and flotation of oxidised chalcopyrite

Moimane, Tiisetso; Huai, Yangyang; Peng, Yongjun

doi:10.1016/j.mineng.2021.106816

Cited by 12 publications

(1 citation statement)

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“…Froth otation is the primary method of enriching chalcopyrite. However, because the natural oatability of pyrite is better than chalcopyrite (Moimane et al, 2021), pyrite can be readily enriched in the chalcopyrite concentrate (Owusu et al, 2014). The pyrite in chalcopyrite concentrate lowers the copper grade but raises the grades of iron and sulfur in the concentrate, which deteriorates the subsequent smelting processes (Khoso et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Flotation separation of pyrite and chalcopyrite with potassium permanganate as a depressant

Cao,

Zhang,

Yan

et al. 2023

Preprint

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This paper used potassium permanganate (KMnO4) as a pyrite depressant to separate pyrite from chalcopyrite. Flotation and contact angle results indicated that pyrite could be depressed by KMnO4 at pH 7, while KMnO4 treated chalcopyrite could be floated by sodium ethylxanthate. Zeta potential analysis revealed that KMnO4 oxidized the pyrite surface, lowering its hydrophobicity. The oxidation products on the pyrite surface were FeO, FeOOH and Fe2(SO4)3 as determined by XPS analyses. These oxidation products were well coated on the pyrite surface, which dramatically lowers the hydrophobicity of pyrite. In contrast, in the case of chalcopyrite, KMnO4 treatment did not generate new oxidation components on its surface, causing chalcopyrite surface to remain hydrophobic and allowing the flotation of chalcopyrite by air bubbles. Thus, pyrite could be efficiently separated from chalcopyrite using KMnO4 as a depressant.

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Section: Introductionmentioning

confidence: 99%