Effect of ground corn and cassava flour on the flotation of iron ore tailings

Rocha, Geriane Macedo; Machado, Nayara Rilla de Souza; Pereira, Carlos Alberto

doi:10.1016/j.jmrt.2018.05.004

Cited by 14 publications

(3 citation statements)

References 6 publications

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“…Rocha et al [92] report a study on the froth flotation of iron ore tailings. Tailings obtained from a dam located in Mineração Usiminas (Brazil) were used.…”

Section: Froth Flotationmentioning

confidence: 99%

Submarine Tailings in Chile—A Review

Rodríguez

Moraga

Castillo

et al. 2021

Metals

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This review aims to understand the environmental impact that tailings produce on the land and marine ecosystem. Issues related to flora, fauna, and the environment are revised. In the first instance, the origin of the treatment and disposal of marine mining waste in Chile and other countries is studied. The importance of tailings’ valuable elements is analyzed through mineralogy, chemical composition, and oceanographic interactions. Several tailings’ treatments seek to recover valuable minerals and mitigate environmental impacts through leaching, bioleaching, and flotation methods. The analysis was complemented with the particular legislative framework for every country, highlighting those with formal regulations for the disposal of tailings in a marine environment. The available registry on flora and fauna affected by the discharge of toxic metals is explored. As a study case, the “Playa Verde” project is detailed, which recovers copper from marine tailings, and uses phytoremediation to neutralize toxic metals. Countries must regularize the disposal of marine tailings due to the significant impact on the marine ecosystem. The implementation of new technologies is necessary to recover valuable elements and reduce mining waste.

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“…Rocha et al [92] report a study on the froth flotation of iron ore tailings. Tailings obtained from a dam located in Mineração Usiminas (Brazil) were used.…”

Section: Froth Flotationmentioning

confidence: 99%

Submarine Tailings in Chile—A Review

Rodríguez

Moraga

Castillo

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…Turrer and Peres (2010) also reported that the starch suspension treated by sodium hydroxide at a 5-weight ratio of starch to alkali recovered over 65% Fe recovery at about 1% silica. In addition, Rocha et al (2019) showed that a concentrate at Fe recovery by over 70% from an iron ore tailing was harvested if an 8-weight ratio of starch to NaOH was chosen to digest. But Tang and Liu (2012) demonstrated that the maximum recovery of fine hematite was achieved by using the starch solution gelatinized by sodium hydroxide at 0.4 N/g starch.…”

Section: Introductionmentioning

confidence: 99%

Influences of magnesium ions in water on gelatinization characteristics of starch and its flocculation behaviors on particles

Tang,

Niu,

Wen

2024

Physicochem. Probl. Miner. Process.

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It is inevitable for the occurrence or built-ups of disturbing cations, especially Ca2+ or Mg2+ ions, in process water during the flotation of iron oxides by using starch as flocculants. In addition to alkali concentrations and temperature, water quality could have an essential role in changing the physicochemical properties of the starch solution and consequently disturbing its flocculation performance on particles. This study aims to identify the effects of magnesium ions on the gelatinization characteristics of starch and its flocculation properties on particles through a series of tests, such as flotation tests, settling tests, size analyses, zeta potentials, powder contact angle, Fourier Transform Infra-Red (FTIR) and X-ray Photoelectron Spectroscopy (XPS) measurement. All results show that magnesium ions at ≤ 4 mmol/L have a positive role due to enlarging the sizes of the particle flocs and accelerating their settling rates. The occurrence of Mg2+ ions at higher concentrations during starch gelatinization only obtains a starch sol-gel with entangled configurations and preoccupied active sites, resulting in the slower settling rate of the particle flocs and less hydrophilicity on mineral surfaces. It could be attributed to the cross-link interactions of magnesium-based precipitates with the acidic groups, especially carboxyl groups on the starch remnants. The suitable acid/base interactions between Mg(OH)2/MgCO3 compounds with these groups in the starch suspension could be beneficial for enhancing the flocculation of hematite as they could build bridges among the pieces and enlarge their sizes as a “load carrier” for aggregation with minerals. However, too much cross-linking could re-entangle the remnants, block their adsorption sites on mineral surfaces, and eventually, weaken the flocculation capacity of starch.

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“…Flotation is considered to be one of the most effective and widely used methods of iron ore beneficiation Yang, 2022;Rocha, 2019). Although reverse flotation has many advantages, for example: the process is simple, the changes of factors such as ore composition, the slime content and have little influence on flotation, and the concentrate is easy to concentrate and filter (Yao, 2016;Shrimali, 2016;Poperechnikova, 2017;Luo, 2016).…”

Section: Introductionmentioning

confidence: 99%

Comparison of the depression effect of two thiol depressants on the separation of specularite and aegirite

Li¹,

Zhang²,

Gao³

et al. 2022

Physicochem. Probl. Miner. Process.

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In this work, two thiol-type reagents, thioglycolic acid (TGA) and mercaptopropionic acid (MPA), were firstly exploited and compared as aegirite depressants with sodium oleate (NaOl) as the collector to separate specularite from aegirite by flotation. The adsorption performances and mechanisms of TGA and MPA on aegirite surface were investigated via flotation experiments, Zeta potential tests, adsorption measurements, contact angle dimensions, and surface characterizations. The results of flotation indicated that TGA and MPA exhibited a considerable depression impact on the flotation of aegirite but little effect on specularite. TGA depicted more excellent depression performance than MPA, which was confirmed by HLB calculation. The results demonstrated that TGA and MPA favorably adsorbed on aegirite surface instead of specularite, hindering the subsequent adsorption of NaOl on specularite and resulting in the surface being hydrophilic. XPS results revealed that TGA and MPA were significantly adsorbed on the surface of aegirite through an interaction between the carboxyl and thiol groups of the depressants and the Si and Fe on the surface of aegirite.

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Effect of ground corn and cassava flour on the flotation of iron ore tailings

Cited by 14 publications

References 6 publications

Submarine Tailings in Chile—A Review

Submarine Tailings in Chile—A Review

Influences of magnesium ions in water on gelatinization characteristics of starch and its flocculation behaviors on particles

Comparison of the depression effect of two thiol depressants on the separation of specularite and aegirite

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