Depression of pyrite in alkaline medium and its subsequent activation by copper

Li, Yuqiong; Chen, Jianhua; Kang, Di; Guo, Jin

doi:10.1016/j.mineng.2011.11.001

Cited by 63 publications

(29 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lime (CaO) is more effective in rejecting pyrite in flotation than NaOH at lower pH levels (pH < 11) (Fuerstenau et al, 1985;Rao and Leja, 2004;Li et al, 2012). It is worth noting that calcium ions from lime also contribute to the depression of pyrite flotation.…”

Section: Ph Modifiersmentioning

confidence: 99%

“…At alkaline pH below 12.5, Ca(OH) + is the main component in solution. Ca(OH) + has a higher affinity for the pyrite surface than OH -and adsorbs readily by electrostatic attraction, since the surface of pyrite is negatively charged at high pH Chen et al, 2011;Li et al, 2012). Ca(OH) + loses electrons to the surface resulting in accumulation of electrons on pyrite surface, which hinders the oxidation of pyrite and the formation of dixanthogen.…”

Section: Ph Modifiersmentioning

confidence: 99%

“…Ca(OH) + loses electrons to the surface resulting in accumulation of electrons on pyrite surface, which hinders the oxidation of pyrite and the formation of dixanthogen. In contrast, when OH À is used as a pH regulator instead of lime, OH -extracts electrons from the surface providing less inhibition to the formation of dixanthogen compared with Ca(OH) + (Li et al, 2012). Hu et al (2000) suggested that the formation of hydrophilic surface species like Ca(OH) 2 , CaSO 4 and Fe(OH) 3 accounted for the depression of pyrite flotation at higher pH.…”

Section: Ph Modifiersmentioning

confidence: 99%

See 2 more Smart Citations

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

Peng

Lauten³

2016

Minerals Engineering

182

View full text Add to dashboard Cite

Section: Ph Modifiersmentioning

confidence: 99%

Section: Ph Modifiersmentioning

confidence: 99%

Section: Ph Modifiersmentioning

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

182

View full text Add to dashboard Cite

“…Pyrite often exists in sulphide mining and coal mines, where it is usually undesired and is often removed by the flotation method. The flotation behavior of pyrite is greatly influenced by the pH of the pulp [13].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…ACCEPTED MANUSCRIPT 13 Collectorless flotation requires a relatively fresh surface, free of hydrophilic oxidation products, in addition to an oxidizing environment [41]. Hydrophilic oxidation products, produced during grinding under oxidizing conditions, coat the mineral surfaces and are responsible for poor metallurgy.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Chemical and colloidal aspects of collectorless flotation behavior of sulfide and non-sulfide minerals

Aghazadeh

Mousavinezhad

Gharabaghi

2015

Advances in Colloid and Interface Science

View full text Add to dashboard Cite

Establishment of electrochemical methods to examine the adsorption of flotation surfactants onto a mineral surface

Guo

Lin

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Significant efforts have been devoted to examine the adsorption of flotation surfactants in both mechanistic studies and process implementations. However, quantitative electrochemical methods for flotation surfactant adsorption examination have not been well‐established, despite of their low‐cost, accurate, in‐situ nature. RESULTS In this paper, voltametric measurement was proven to quantitatively examine the adsorption of activating copper and lead ions onto a pyrite surface. The activation was achieved by abrading minerals in a heavy‐metal‐bearing solution and the measurements were performed by transferring the minerals to a solution free of those heavy metals. This provided a simple but realistic simulation of the mineral grinding process and simplified the adsorption quantification by excluding any other irrelevant electrochemical reactions near the surface. Reliable electrochemical impedance spectroscopy (EIS) upon adsorption with convincing physical models for interpreting the interfacial structures also were obtained in this paper. The additional pseudocapacitive behaviour of the copper sulfide surface layer led to an increased capacitance of the measured EIS. A resistive but ion‐permeable xanthate adsorption layer exhibited its own relaxation process. Voltammetry and impedance studies showed that cyanide competed with both copper and lead for their adsorption, whereas lead activation showed greater tolerance to cyanide than copper did. CONCLUSION Electrochemical methods have been established to examine the adsorption of copper, lead and xanthate onto pyrite surface, in relation to various flotation conditions, which exhibited significant implication to the flotation of pyritic gold ore using cyanide‐bearing water. © 2020 Society of Chemical Industry

show abstract

Depression of pyrite in alkaline medium and its subsequent activation by copper

Cited by 63 publications

References 12 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

Chemical and colloidal aspects of collectorless flotation behavior of sulfide and non-sulfide minerals

Establishment of electrochemical methods to examine the adsorption of flotation surfactants onto a mineral surface

Contact Info

Product

Resources

About