Flotation of Iron Ores: A Review

Zhang, Xiaolong; Gu, Xiaotian; Han, Yuexin; Parra-Álvarez, N.; Claremboux, V.; Kawatra, S. Komar

doi:10.1080/08827508.2019.1689494

Cited by 110 publications

(43 citation statements)

References 105 publications

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“…Thus, most iron ore which is mined undergoes a concentration process of some variety. This typically involves crushing the iron ore to its liberation size, separating it via either surface selective flotation or magnetic separation, and then filtering it to remove excess water (Eisele and Kawatra, 2003;Zhang et al, 2019).…”

Section: Background On Iron Ore Pelletizationmentioning

confidence: 99%

“…These reagents include flocculants, dispersants, collectors, depressants, and frothers. Flocculants and dispersants alter the zeta potential of the surface, collectors attach to the surface to modify the interfacial tension, depressants are used to influence the effects of other reagents on specific surfaces or to modify the interfacial tension directly, and frothers stabilize the formation of bubbles in the liquid (Zhang et al, 2019).…”

Section: Electrical Double Layer Theorymentioning

confidence: 99%

“…Thus, the surface chemistry of the whole agglomerate behaves like silica, making the surfaceselective flotation process essentially useless. This issue is avoided by proper desliming (Zhang et al, 2019), which is a common step taken during the concentration process.…”

Section: Electrical Double Layer Theorymentioning

confidence: 99%

“…However, it is actually known that calcium and magnesium interfere with the activity of bentonite binders (Eisele and Kawatra, 2003). To head off concerns that alternative binders should have been tested in that case, calcium and magnesium also play critical roles in starch adsorption (Zhang et al, 2019). With the pellet feed in question it is possible to form weak pellets without binder, but such pellets tend to have wide variations due to both balling kinetics and overall relatively low strengths to begin with.…”

Section: Revisiting Microscopic Hypothesis Bmentioning

confidence: 99%

“…Dispersion and flocculation are phenomena associated with the surface charge of particles in liquid solution (Halt and Kawatra, 2017;Zhang et al, 2019). Essentially no model of pelletization takes this surface charge into account, but the experimental work of Halt and Kawatra (2017) shows that it has a drastic effect on the final pellet strength.…”

Section: Introductionmentioning

confidence: 99%

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Role of Flocculation and Dispersion in Pelletization of Iron Ore

Claremboux¹

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Section: Background On Iron Ore Pelletizationmentioning

confidence: 99%

Section: Electrical Double Layer Theorymentioning

confidence: 99%

Section: Electrical Double Layer Theorymentioning

confidence: 99%

Section: Revisiting Microscopic Hypothesis Bmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Role of Flocculation and Dispersion in Pelletization of Iron Ore

Claremboux¹

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Mathematical Modeling of Fluidized Bed Magnetizing Roasting of Iron Ore Fines

Sahoo,

Mantripragada,

Sarkar

2024

steel research int.

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The fluidized bed magnetizing roasting of low‐grade iron ore fines is employed as a beneficiation technique in iron‐making and steel‐making industries. In the present work, the unreacted shrinking core reaction kinetic model is coupled with the two‐fluid and kinetic theory of granular flow gas–solid flow model to simulate magnetizing roasting of hematite to magnetite in iron ore fines using a fluidized bed reactor. The model is validated with published experimental findings. Thereafter, the influence of different process parameters such as gas temperature, composition, velocity, and particle size on the reduction fraction and rate along with mass fraction and emission is studied. The reduction rate increases with gas temperature and mass fraction while it decreases with particle size. The emission increases with gas temperature, particle size, and mass fraction. However, the influence of gas velocity on these parameters is not significant. The reduction rate and time vary from 0.0010 to 0.0067 s−1 and 65 to 553 s, respectively, at a reduction fraction of 0.5. The mass fraction and emission range from 0.80 to 0.92 and from 0.63 to 4.14 g kg−1 ore, respectively.

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Froth flotation process and its application

Mondal

Acharjee

Mandal

et al. 2021

Vietnam Journal of Chemistry

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The paper is about the froth flotation process and its application. It is a metallurgical process for the extraction of metals in a pure state from their ores: especially for sulfide ores. Froth flotation is one of the steps which is generally performed before roasting and it deals with the surface chemistry of liquids and of the minerals to be separated. This process requires a particular setup to be performed which contains different components. Surfactants play the most important role here. Different types of surfactants are used in different ways and each of them plays a crucial role like, collectors, frothers, froth stabilizers, depressants and activators, pH regulators etc. The sulfide ore flotation process can be studied by both chemical and electrochemical phenomena considering the interfacial energies. A broad application of this process in industrial field is the flotation of iron ores which is of two types: direct and reverse flotation. The later one is again based on two different types as cationic and anionic reverse flotation. In all these processes different types of flotation reagents are used. Another application is separation of malachite and azurite ore using sulfidization flotation.

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Flotation of Iron Ores: A Review

Cited by 110 publications

References 105 publications

Role of Flocculation and Dispersion in Pelletization of Iron Ore

Role of Flocculation and Dispersion in Pelletization of Iron Ore

Mathematical Modeling of Fluidized Bed Magnetizing Roasting of Iron Ore Fines

Froth flotation process and its application

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