A study of the pyrrhotite depression mechanism by diethylenetriamine

Yoon, Roe‐Hoan; Basilio, C.I.; Marticorena, M.A.; Kerr, A.N.; Stratton-Crawley, R.

doi:10.1016/0892-6875(95)00041-n

Cited by 52 publications

(17 citation statements)

References 3 publications

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“…It may be because the activation product Cu(I)-S is highly stable and inert towards DETA, but becomes reactive towards DETA when oxidized to copper oxides/ hydroxides (Agorhom et al, 2014). Similar observation was reported by Yoon et al (1995) that the depression of pyrrhotite flotation by DETA was more effective when the Cu-activated pyrrhotite surface was oxidized.…”

Section: Diethylenetriamine (Deta)supporting

confidence: 66%

“…DETA (NH 2 ACH 2 ACH 2 ANHACH 2 ACH 2 ANH 2 ) is a polyamine with the molecular weight of 103.1 which has recently been introduced as a depressant for pyrite and pyrrhotite flotation (Yoon et al, 1995;Sui et al, 1998;Bulatovic, 2007). Similar to chitosan, DETA and similar polyamine compounds are excellent complexing or chelating agents.…”

Section: Diethylenetriamine (Deta)mentioning

confidence: 99%

See 1 more Smart Citation

The depression of pyrite in selective flotation by different reagent systems – A Literature review

Peng

Lauten³

2016

Minerals Engineering

187

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Section: Diethylenetriamine (Deta)supporting

confidence: 66%

Section: Diethylenetriamine (Deta)mentioning

confidence: 99%

The depression of pyrite in selective flotation by different reagent systems – A Literature review

Peng

Lauten³

2016

Minerals Engineering

187

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“…Most of new reagents found effective for low grade ores were chemicals capable of interacting with specific ions in mineral lattice. [3][4][5] Pyrochlore [(Na,Ca) 2 Nb 2 O 6 (OH,F)] is currently the most important commercially exploitable niobium containing mineral, which usually co-exists and associates with carbonate rocks in the Earth's crust. In the processing of the carbonatite niobium ores, significant amounts of fines are generated due to the friable nature of the niobium oxide minerals and the soft carbonatite rock matrix.…”

Section: Introductionmentioning

confidence: 99%

Adsorption behaviour of sodium hexametaphosphate on pyrochlore and calcite

Liu

2013

Canadian Metallurgical Quarterly

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FTIR, XPS and zeta potential measurements were performed on pyrochlore and calcite to study the adsorption mechanisms of sodium hexametaphosphate (NaHMP). While no hexametaphosphate could be detected on the FTIR spectra of NaHMP treated pyrochlore or calcite, the observed chemical shifts of the binding energies of Ca 2p 5/2 (0?25 eV) and P 2p (0?20 eV) electrons indicated that the hexametaphosphate groups formed a complex with calcium on calcite. The complex seemed soluble in water leaving a low concentration of its residue on calcite surface after water washing, thus undetectable by FTIR. The binding energy shifts of Nb 3d 5/2 (0?13 eV) and Ca 2p 5/2 (0?10 eV) electrons on NaHMP-treated pyrochlore were within instrumental resolution, therefore, NaHMP was not strongly bound to pyrochlore. The zeta potentials of pyrochlore and calcite were both lowered in the presence of NaHMP. However, for pyrochlore, the zeta potential drop occurred mainly in the acidic pH range, while the drop for calcite was independent of pH, indicating possible chemisorption of NaHMP on calcite. The work explained the selective depressive function of NaHMP in the hydroxamic acid flotation of carbonatite niobium ores.On a effectué des mesures de FTIR, de XPS et de potentiel zê ta du pyrochlore et de la calcite afin d'é tudier les mé canismes d'adsorption de l'hexamé tahosphate de sodium (NaHMP). Bien qu'on ne puisse pas dé tecter d'hexamé taphosphate dans les spectres de FTIR du pyrochlore ou de la calcite traité s au NaHMP, les dé calages chimiques observé s des é nergies de liaison des électrons de Ca 2p 5/2 (0?25 eV) et de P 2p (0?20 eV) indiquaient que les groupes d'hexamé taphosphate formaient un complexe avec le calcium sur la calcite. Le complexe semblait soluble dans l'eau, laissant une faible concentration de son ré sidu à la surface de la calcite aprè s lavage à l'eau, donc indé tectable par FTIR. Les dé calages de l'é nergie de liaison des é lectrons du Nb 3d 5/2 (0?13 eV) et du Ca 2p 5/2 (0?10 eV) du pyrochlore traité au NaHMP se situaient dans les limites de ré solution de l'instrument. Donc, le NaHMP n'é tait pas fortement lié au pyrochlore. Les potentiels zê ta du pyrochlore et de la calcite s'abaissaient tous deux en pré sence de NaHMP. Cependant, la chute de potentiel zê ta du pyrochlore se produisait principalement dans la gamme de pH acide, alors que la chute pour la calcite é tait indé pendante du pH, indiquant la possibilité d'une chemisorption du NaHMP sur la calcite. Ce travail explique la fonction sé lective et dé pressive du NaHMP lors de la flottation à l'acide hydroxamique des minerais de carbonite de niobium.

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“…The nickel and copper xanthate complexes have –log(K sp ) values several orders higher than those of iron‐xanthates (they are significantly more stable) and thus enhance its floatability. These amine‐based chelants preferentially complex with surface adsorbed (thereby solubilizing) Ni 2+ , Cu 2+ , Co 2+ , and even Fe 2+ ions; interestingly, they are non‐selective towards Fe 3+ ions (which remain as Fe(OH) 3 on pyrrhotite surface and promote its depression under oxidizing conditions) . It has been postulated that these chelants are more effective at solubilizing surface adsorbed metals from oxidized ores, where the activation products are metal oxides (e.g.…”

Section: Pyrrhotite Flotationmentioning

confidence: 99%

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing

Multani

Waters

2018

Can J Chem Eng

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Pyrrhotite is one of the most abundant sulphide gangue minerals in base metal mining operations. It has little economic value and is a significant contributor of SO2 emissions at the smelting stage, thus it is rejected in most concentrators, requiring a concerted effort to ensure it is well separated from valuable minerals. The mineral processing of pyrrhotite is generally understood, however it has many complex crystallographic structures (superstructures) that behave differently in the flotation pulp for which the information is sparse and dispersed throughout the literature. Traditionally, the superstructures were largely isolated into magnetic/non–magnetic circuits and floated separately. Many operations have now transitioned away from magnetic separators, and treat the superstructures in the same flotation circuit where their flotation responses are quite different. Historically, it was perceived that the superstructures behaved virtually the same; whereas, recent work has clearly demonstrated that there are quantifiable differences in their flotation responses. The available information is scattered in the literature and is also plagued with many contradictions, making it very difficult for researchers to retrieve relevant information pertaining to the superstructures. This review aims to reduce the confusion by summarizing the superstructure nomenclature, characterization methods, aqueous stability, surface charges and superstructure‐reagent interactions, and available flotation data.

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A study of the pyrrhotite depression mechanism by diethylenetriamine

Cited by 52 publications

References 3 publications

The depression of pyrite in selective flotation by different reagent systems – A Literature review

The depression of pyrite in selective flotation by different reagent systems – A Literature review

Adsorption behaviour of sodium hexametaphosphate on pyrochlore and calcite

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing

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A study of the pyrrhotite depression mechanism by diethylenetriamine

Cited by 52 publications

References 3 publications

The depression of pyrite in selective flotation by different reagent systems – A Literature review

The depression of pyrite in selective flotation by different reagent systems – A Literature review

Adsorption behaviour of sodium hexametaphosphate on pyrochlore and calcite

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe7S8/ 5C – Fe9S10) in Ni‐Cu sulphide mineral processing

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A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing