The effect of the dispersion degree on the floatability of an oxidased zinc ore

Peres, Antônio Eduardo Clark; Borges, Andrés A.; Galéry, Roberto

doi:10.1016/0892-6875(94)00081-6

Cited by 22 publications

(6 citation statements)

References 1 publication

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“…However, the Zn recovery is very low. The obtained results are in good agreement with previous studies (Peres et al, 1994;Keqing et al, 2005;Ejtemaei et al, 2011).…”

Section: Effect Of Slimesupporting

confidence: 96%

Flotation of zinc oxide ores by cationic and mixed collectors

Mehdilo

Zarei

Irannajad

et al. 2012

Minerals Engineering

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“…However, the Zn recovery is very low. The obtained results are in good agreement with previous studies (Peres et al, 1994;Keqing et al, 2005;Ejtemaei et al, 2011).…”

Section: Effect Of Slimesupporting

confidence: 96%

Flotation of zinc oxide ores by cationic and mixed collectors

Mehdilo

Zarei

Irannajad

et al. 2012

Minerals Engineering

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“…(i) the dispersion degree of the slimes increases significantly when the concentration of sodium sulphide changes from the low level to the top level; (ii) sodium hexametaphosphate is the most effective reagent regarding an increase in the dispersion degree; this reagent presented good performance in another investigation with a different calamine ore from the same region (Peres et al, 1994); (iii) the interaction between hexametaphosphate and sodium sulphide reduces the dispersion degree; the same effect is observed in the interaction between polyacrylate and sodium sulphide; (iv) sodium polyacrylate acted as a slimes dispersant but it was not as effective as sodium hexametaphosphate; (v) Calgon is also an effective dispersant; (vi) the interaction between hexametaphosphate and Calgon caused a decrease in the dispersion degree when the variables change from the low to the high level; (vii) the association between polyacrylate and Calgon decreases the dispersion degree when the concentration of these reagents increases.…”

Section: Dispersionmentioning

confidence: 93%

Reagents in calamine zinc ores flotation

Pereira¹,

Peres

2005

Minerals Engineering

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Oxidised zinc ores are traditionally floated with fatty amines as collector. The effectiveness of this reagent requires a pre-sulphidisation stage with sodium sulphide in conjunction with soda ash. Especially in the case of calamine ores, a dispersing agent becomes necessary. The collector must be emulsified with a fuel oil and the frother. This flotation system is characterised by the use of very large amounts of reagents. The proportion of each reagent in the reagents system must be carefully optimised.

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“…Molecular weights above 1.000.000 Da are considered adequate for flocculating action (Attia, 1992). Peres et al (1994) reported the use of the PAM's SPA 15 and SPA 20, with molecular weights of 1200 Da and 2500 Da, respectively, in the successful dispersion of an oxidized zinc ore.…”

Section: Mining Mineraçãomentioning

confidence: 99%

Ultrafine quartz flocculation: Part I. System characterization and variables selection

Silva

Martins

et al. 2022

REM, Int. Eng. J.

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A characterization study was performed to verify the more relevant physicochemical properties for quartz flocculation with polyacrylamide, as well as to define which variables should be further investigated regarding this flocculation system. Polyacrylamide was evaluated through molecular weight, radius of gyration, and infrared spectrometry. A natural quartz sample was investigated regarding its particle size distribution, specific surface area, mineralogical and chemical composition. The zeta potential of quartz with flocculant and surfactant was also analyzed. The results indicated that the quartz had high purity and particle sizes between 38 and 10 µm, which was within the intended particle size range; the flocculant presented a suitable molecular weight for the proposed flocculation system. Based on literature, nine variables were chosen to be investigated in Part II of this study: flocculant and surfactant concentration, flocculant and surfactant conditioning time, flocculation addition time, agitation intensity, pH of the suspension, flocculation time, and solid concentration.

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The effect of the dispersion degree on the floatability of an oxidased zinc ore

Cited by 22 publications

References 1 publication

Flotation of zinc oxide ores by cationic and mixed collectors

Flotation of zinc oxide ores by cationic and mixed collectors

Reagents in calamine zinc ores flotation

Ultrafine quartz flocculation: Part I. System characterization and variables selection

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