Investigation of the interaction mechanism of depressants in the reverse cationic flotation of complex iron ores

Veloso, C.H.; Filippov, L.O.; Filippova, I.V.; Ouvrard, Stéphanie; Araujo, Anna Carla

doi:10.1016/j.mineng.2018.05.031

Cited by 52 publications

(14 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…AP depressing ability is due to the presence of hydroxyl groups in the chemical structure of the starch (Pinto et al, 1992;Pavlovic and Brandao, 2003). According to Veloso et al (2018), CS shows higher depressing ability for hematite at pH 10.5, which is consistent with the results found with high dosages of the depressant (20 and 40 mg/L). At these conditions, the average hematite depressability was 81.27 ± 1.68% and 91.62 ± 0.10%, respectively.…”

Section: Quartz Microflotation Resultssupporting

confidence: 62%

“…The addition of the depressant reduced the quartz floatability, with a few exceptions. Veloso et al (2018) determined the isotherm adsorption of unmodified regular CS (73% AP and 27% AM) by igneous iron ore samples. The authors found that at pH 10.5, the depressant presented lower adsorption in the silicates (composed of albite, chamosite, diopside, microcline, quartz, and epidote), allowing them to be floated by the collectors.…”

Section: Lipids (%)mentioning

confidence: 99%

See 1 more Smart Citation

Hematite and quartz microflotation using millet starch as depressant

Silva¹,

Sousa

Silva³

2021

REM, Int. Eng. J.

View full text Add to dashboard Cite

Brazil is among the world's largest iron ore producers. The standard concentration method is reverse cationic flotation using amines, and their derivatives, such as quartz collector and corn (as either grits, flour, or starch) as the hematite depressant. Corn is considered cheap, abundant, and available all around the country. However, its demand has been abruptly increasing over the last few years, mainly due to the emerging of new attractive markets, such as ethanol production. In order to propose a feasible replacement for corn, hematite and quartz samples from the Brazilian Iron Quadrangle were tested in a modified Hallimond tube using millet starch as depressant for the first time (corn and sorghum starch were used as benchmark). Tests were carried out with four different depressant dosages and four different pHs, all in triplicate. It was possible to reach quartz floatability above 98% and hematite depressability above 93% for millet and sorghum starches. This fundamental study shows that replacing corn with millet poses a real opportunity to reduce operational costs.

show abstract

Section: Quartz Microflotation Resultssupporting

confidence: 62%

Section: Lipids (%)mentioning

confidence: 99%

Hematite and quartz microflotation using millet starch as depressant

Silva¹,

Sousa

Silva³

2021

REM, Int. Eng. J.

View full text Add to dashboard Cite

show abstract

“…Iron ore is the second-most traded mineral commodity on the market, mainly for the manufacture of cast iron and steel (98% of the world production) [1][2][3]. It corresponds to 15% of the products exported by Brazil, which stands as the third-largest iron-producing country and holds 12% of the world reserves, located mainly in the provinces of Quadrilátero Ferrífero, minas Gerais (MG) and Carajás, Pará (PA) [4,5].…”

Section: Introductionmentioning

confidence: 99%

Proposal for an Environmentally Sustainable Beneficiation Route for the Amphibolitic Itabirite from the Quadrilátero Ferrífero-Brazil

Gonçalves

Lima

2020

Minerals

View full text Add to dashboard Cite

The high world demand for iron ores opposed to the rapid exhaustion of high-grade deposits from the main producing regions around the world has motivated the search and/or improvement of beneficiation routes, which enable the economic use of iron formations previously considered marginal ores, which have the potential to considerably increase mineable reserves due to their large volume. In this study, a sample of amphibolitic itabirite from the eastern region of the Quadrilátero Ferrífero, Minas Gerais, Brazil was characterized, aiming at its use in the industrial pelletizing circuit. The main physical characteristics of this ore are moisture = 10% and specific weight = 3710 kg/m3. The ore has a high grade of loss on ignition—LOI (6.7%) and P (0.14%). Through X-ray diffractometry (XRD), optical microscopy and scanning electron microscope—SEM, the ore was found to consist of 64.5% goethite (amphibolitic, alveolar, massive and earthy); 6.8% hematite (martitic, granular and lamellar) and 0.9% magnetite. The main gangue mineral is quartz (25.5%). Based on the results of concentration tests (magnetic and flotation) performed with the studied sample, the magnetic concentration route of deslimed sample followed by the addition of slimes in magnetic concentrate can be incorporated into the pelletizing process.

show abstract

“…Also, the depressants used for gangue minerals depression, such as organic colloids (dextrine, starch), quebracho tannin, sodium phosphates, sodium silicate solutions containing polyvalent cations (hydrosols), etc. [7,[12][13][14], depress tungsten minerals and cassiterite recovery to some extent. However, it is hard to gain good further separation of the tungsten and cassiterite minerals by flotation with multiple attempts.…”

Section: Introductionmentioning

confidence: 99%

Beneficiation and Purification of Tungsten and Cassiterite Minerals Using Pb–BHA Complexes Flotation and Centrifugal Separation

Yue

Han

et al. 2018

Minerals

View full text Add to dashboard Cite

Pb–BHA complexes have been shown to be selective for the separation of tungsten and cassiterite minerals from calcium minerals. These minerals could be enriched synchronously to some extent using Pb–BHA complexes flotation. However, it is difficult to further improve the quality and recovery of the scheelite, wolframite, and cassiterite concentrate due to their different behavior in flotation, such as flotation rate and sensitivities to depressants. Moreover, the super fine particles create some challenges for the cleaning flotation process. In this study, advanced gravity separators for super fine particles were introduced for the cleaning process based on the slight difference in the specific gravity of scheelite, wolframite, and cassiterite. The new process featured pre-enrichment using Pb–BHA flotation, and upgrading using gravity separation, taking into account both the similarities and differences in floatability and density of the different minerals. The grades of WO3 and Sn in the concentrate of the new process reached to 61% and 2.89%, respectively, and the recovery of Sn was significantly improved. In addition, gravity separation is highly efficient, cost effective, and chemical-free, which is environmentally friendly. This study has proven that physical separation can be used for the purification of flotation products and provide some solutions for separation problems of complex refractory ores, which has, up until now, been rarely reported in the literature and/or applied in mineral processing.

show abstract

Investigation of the interaction mechanism of depressants in the reverse cationic flotation of complex iron ores

Cited by 52 publications

References 28 publications

Hematite and quartz microflotation using millet starch as depressant

Hematite and quartz microflotation using millet starch as depressant

Proposal for an Environmentally Sustainable Beneficiation Route for the Amphibolitic Itabirite from the Quadrilátero Ferrífero-Brazil

Beneficiation and Purification of Tungsten and Cassiterite Minerals Using Pb–BHA Complexes Flotation and Centrifugal Separation

Contact Info

Product

Resources

About