Effect of microwave treatment on the flotation and magnetic separation properties of pyrite, chalcopyrite, galena and sphalerite

Can, Metin; Bayraktar, I.

doi:10.1007/bf03403214

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…With respect to the AM, by increasing the time and power of the microwave radiation, floatability of chalcopyrite and pyrite reduced. With this regard, Can and Bayraktar, 2007 observed that the floatability of pyrite and chalcopyrite were reduced with increasing the power and radiation time which is in absolute agreement with our findings. , also showed the same phenomenon for sulfide minerals which oxidized when exposed to rich oxygen, and phase changes occurred at their surfaces.…”

Section: Metallurgical Evaluationsupporting

confidence: 92%

“…In the case of milled ore sample, some pores are also created on the surface of chalcopyrite through microwave pretreatment (Nuri et al, 2014;Mehdilo and Irannajad, 2016). Indeed, heat adsorption might cause phase transformation and formation of different oxidation layers which starts from the surface of the mineral and continues to the core of each particle (Can and Bayraktar, 2007). In addition to the SEM images, the chemical compositions of the chalcopyrite and pyrite surfaces are displayed by EDX spectra for untreated and microwave-treated samples.…”

Section: Scanning Electron Microscopy (Sem) Studiesmentioning

confidence: 99%

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Effect of microwave system location on floatability of chalcopyrite and pyrite in a copper ore processing circuit

Gholami¹,

Rezai²,

Mehdilo³

et al. 2020

Physicochem. Probl. Miner. Process.

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The present work aims at investigating the effect of microwave local positions (i.e. before crushing (BC), after crushing (AC) and after milling (AM)) on microwave-assisted flotation of chalcopyrite and pyrite in a porphyry copper complex deposit. Individual given samples for each state were pre-treated with a variable power microwave at a power level of 90 to 900W for 15, 30, and 60s. Furthermore, froth floatation experiments were carried out using a laboratory mechanical Denver flotation cell on both microwave-treated and untreated samples. Particle surface properties were characterized by a scanning electron microscopy (SEM) and an energy-dispersive X-ray spectroscopy (EDX) analysis. The results showed that the chalcopyrite and pyrite floatabilities increased monotonically by rising the exposure time and power level for the uncrushed preconditioned samples (BC) due to the enhancement of mineral liberation degrees together with the formation of sulphide species and polysulphides on the mineral surfaces. However, flotation results of treated samples for the crushed one (AC) revealed an optimum range. Formation of intensive oxide layers on the mineral surfaces of milled samples (AM) led to a substantial reduction in their recoveries by increasing the microwave's power level and the sample's exposure time. The results obtained from mineral's floatabilities in recleaner stage showed that the microwave-assisted sample at 900W for 30s at BC state favourably provided 5% higher S.E.'s than that of the untreated sample. Finally, it was concluded that the microwave pretreatment of samples induced the best floatability responses if it located before the crusher.

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Section: Metallurgical Evaluationsupporting

confidence: 92%

Section: Scanning Electron Microscopy (Sem) Studiesmentioning

confidence: 99%

Effect of microwave system location on floatability of chalcopyrite and pyrite in a copper ore processing circuit

Gholami¹,

Rezai²,

Mehdilo³

et al. 2020

Physicochem. Probl. Miner. Process.

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show abstract

“…Oxidation of sulphide minerals in the presence of oxygen and water is a natural process, which affects the mechanism of collector adsorption on the surface of sulphide minerals and disrupts it (Quast, 2012;Joseph-Soly et al, 2015;Quast, 2016). Microwave irradiation on the surface of sulphide minerals increases their surface oxidation rate (Henda et al, 2005;Can and Bayraktar, 2007). For example, irradiation of these waves on the surface of copper sulphide minerals, including chalcopyrite, reduces the recovery of chalcopyrite, and as radiation power increases, the amount of this decrease is greater.…”

Section: Introductionmentioning

confidence: 99%

The Microwave Irradiation Effect on the Floatability of Mixed Sulphide/Oxide Copper Ores

Bahrami

Chehreghani

Kazemi

et al. 2021

MGPB

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Pre-treatment of copper sulphide and oxide ores using microwave radiation causes a difference in their floatability through change in the surface properties of the minerals. The aim of this study is to investigate the behaviour of Sungun porphyry copper ore under the influence of microwave radiation. In this regard, the feed sample of Sungun copper flotation circuit has been subjected to microwave irradiation for 0-120 s and a radiation power of 0-600 W. The prepared samples were then subjected to flotation experiments. According to the results, the grade of sulphide and oxide Cu minerals, as well as the grade of Fe, increased by microwave irradiation in all experiments compared to the non-irradiated samples. At the same time, recovery rate has a reversed trend and decreased in all cases. Variations in the recovery rates of copper oxides and sulphides due to microwave irradiation are different. Increasing the power of irradiation resulted in a greater reduction in the recovery of copper oxides than of sulphides. On the other hand, increasing the power of microwave irradiation reduced the amount of iron recovery in the copper concentrate and with an increase in the duration of microwave irradiation, the reduction of iron recovery values is even more pronounced. Changes in the power and duration of microwave radiation have not had a significant effect on variations in oxide copper grade in flotation tailings. While the grade of sulphides in tailing is affected by the parameters of microwave irradiation and with an increase in power and duration of microwave irradiation, the grade of copper in tailing increases.

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Influence of nanosecond electromagnetic pulses on electrophysical properties of pyrite and arsenopyrite

Ryazantseva

Bogachev

2009

J Min Sci

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Effect of microwave treatment on the flotation and magnetic separation properties of pyrite, chalcopyrite, galena and sphalerite

Cited by 5 publications

References 13 publications

Effect of microwave system location on floatability of chalcopyrite and pyrite in a copper ore processing circuit

Effect of microwave system location on floatability of chalcopyrite and pyrite in a copper ore processing circuit

The Microwave Irradiation Effect on the Floatability of Mixed Sulphide/Oxide Copper Ores

Influence of nanosecond electromagnetic pulses on electrophysical properties of pyrite and arsenopyrite

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