Adsorption of yeast dextran on clinochlore surface and the implications for pyrite/clinochlore separation

Wang, Zhen; Zhang, Dan; Zhao, Kun; Safarov, Sayfidin; Xu, Ying

doi:10.37190/ppmp/151635

Cited by 2 publications

(1 citation statement)

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“…As is well-documented in the literature, the probability of the bubble at tachment to solid surfaces depends on many factors, but mainly on the stability and drain age of the wetting film [44][45][46]. In addition, the effects of measurement parameters suc as air bubble size, particle size, pH, and the mode of measurement like the polished sur face or particle bed also have important implications on the results of measurement [30,47]. These results can be used as an indicator to explain our experimental results unde different conditions.…”

Section: Micro-flotation Experimentsmentioning

confidence: 98%

Correlation of Flotation Recoveries and Bubble–Particle Attachment Time for Dodecyl Ammonium Hydrochloride/Frother/Quartz Flotation System

Batjargal,

Güven,

Ozdemir

et al. 2023

Minerals

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Recent studies in the flotation of fine particles have necessitated new techniques and analyses for developing various strategies. Particularly, the improvements in flotation chemistry including the selection of the type of frother, collector, and other reagents have become very significant. In this study, the effect of different commercial polypropylene glycol frothers (PPG200, 400, and 600) in the presence of dodecylammonium hydrochloride (DAH) was investigated for their contribution to flotation recoveries and bubble–particle attachment time values of fine quartz minerals. Zeta potential measurements with DAH were also carried out as a function of pH and reagent concentration to justify the effect of collector usage alone on the charge of particles. A linear increase in flotation recoveries against collector concentration, e.g., 7.4% recovery at 1 × 10−5 mol/L DAH and 65.4% recovery at 1 × 10−3 mol/L DAH, was obtained. In this context, the contribution of frothers was particularly important in that a recovery of 15.91% in the absence of the frother and a modest increase to 19.70% was obtained upon the addition of PPG600 at its critical coalescence concentration (CCC) of 3 ppm. Finally, a strong correlation was found between the bubble–particle attachment time and flotation recovery as a function of collector concentration (lowest attachment time vs. highest flotation recovery). The latter correlation is very promising because bubble attachment time leads to various micro-mechanisms in flotation including bubble film thinning, bubble rupture, and induction time, and consequently, frother efficiency in the presence and absence of a collector. As a result, the experimental findings were gathered to achieve a consistent base for further fundamental studies on the application of the synergistic effect of frothers and collectors in the flotation of fine particles.

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