Physical separation of iron ore: magnetic separation
This chapter introduces the principle of how low-grade iron ores are upgraded to high quality iron ore concentrates by magnetic separation. Magnetite is the most magnetic of all the naturally occurring minerals on earth and can be readily extracted by low-intensity magnetic separators from magnetite ores.
[PDF] Accumulation of magnetite by flotation on bubbles …
Results demonstrate that magnetite-bubble pairs do ascend in silicate melt, accumulating in an upper layer that grows during re-equilibration, contradicting the paradigm that magnetites must settle gravitationally in silicates melt. Magnetite (Fe3O4) is an iron ore mineral that is globally mined especially for steel production. It is denser …
Sulfuric acid pretreatment of oxidized pyrrhotite in flotation
The impact of sulfuric acid pretreatment on the surface property of oxidized pyrrhotite (OX-pyrrhotite) and its application in flotation desulphurization of magnetite concentrate were investigated in this study.
Accumulation of magnetite by flotation on bubbles …
(magnetite-bearing) water-undersaturatedconditions of 1050 °C and 250 MPa and intrinsic redox conditions that ... Accumulation of magnetite by flotation on bubbles during decompression of ...
Reverse flotation separation of hematite from quartz …
The effect of magnetite as a magnetic seed on the flotation separation of fine hematite and quartz was studied by reverse micro-flotation and sedimentation. The results demonstrate that fine magnetite could selectively report to the pulp product with hematite particles, forming aggregates that avoided attachment to quartz particle surfaces.
Accumulation of magnetite by flotation on bubbles during …
Schematic illustration of the magnetite-flotation model for Kiruna-type iron oxide-apatite deposits 10. (a) Primary igneous magnetite crystallizes from silicate melt in a magma reservoir and should gravitationally settle owing to its higher density relative to melt. However, (b) if saline fluid exsolves during decompression and bubbles nucleate on …
Improving reverse flotation of magnetite ore using pulse …
This paper proposes a new method to improve the reverse flotation performance of magnetite ore using a pulse magnetic field. Flotation tests were performed in a flotation column with six external ...
Processes | Free Full-Text | Extraction of Phosphorous from a
In this study, there is 1.42% P2O5 in the P-containing V-Ti magnetite tailings in Miyi Region of China, with the valuable minerals mainly including apatite, and aluminosilicate minerals as the main gangue components. The direction flotation process was used to recover phosphorous from the low-grade phosphorous-bearing V-Ti …
[PDF] Enhanced effect of fine magnetite on the flotation …
Semantic Scholar extracted view of "Enhanced effect of fine magnetite on the flotation performance of fine hematite in sodium oleate system" by B. Pei et al.
Accumulation of magnetite by flotation on bubbles during
The results demonstrate that magnetite-bubble pairs do ascend in silicate melt, accumulating in an upper layer that grows during re-equilibration.
Beneficial effects of a polysaccharide-based grinding aid on magnetite …
This study aims to enhance the theoretical insights for using PGA on grinding magnetite and its possible effects on magnetite-quartz flotation separation as a strategic approach. While the new PGA ...
Investigation on the influence of surface roughness on …
The influence of surface roughness on the floatability of magnetite particles was performed by flotation tests using an XFG flotation machine. Flotation tests …
Reverse Flotation
Figure 9.10 presents a typical flow sheet for processing a magnetite ore using a combination of drum LIMS and reverse flotation. The ore is composed of magnetite and gangue minerals, which are mainly quartz. The flow sheet includes three stages of grinding and magnetic separation once again to reject quartz as early as possible.
Magnetite Flotation from Sanidine with Environmental …
In magnetite flotation studies, primary amine groups of PAMAM act as anionic collectors, while amide groups act as cationic collectors. While the flotation recovery of the commercial Aero 704 collector, which is widely used in magnetite flotation, decreases rapidly after pH 9, PAMAM's flotation recovery decreases slightly but its ...
Selective adsorption mechanism of polyoxyethylene alkyl …
Effective flotation separation of magnetite from iron-bearing silicate minerals is difficult with conventional collectors because of their similar surface properties.
Enhanced effect of fine magnetite on the flotation …
In this work, the effect of magnetite with different particle sizes on the flotation performance of coarse and fine hematite particles was investigated using sodium oleate as a collector.
Evaluation of the biological flotation reagent obtained from
In this study, the flotation separation of magnetite and phlogopite was examined using biological reagent obtained from Paenibacillus amylolyticus. Micro-flotation experiments were performed by ...
Accumulation of magnetite by flotation on bubbles …
The abundance of smaller magnetite crystals in the H2O + Cl-bearing experiments reveals that a large-scale process by which innumerable magnetite-fluid bubble pairs separate …
Inhibiting the amine flotation of magnetite through …
The motion, size and morphology of magnetite aggregates and bubbles-magnetite aggregates in the flotation cell have been monitored by video microscopy. The cationic collector dodecyl amine and an iron concentrate with 65.1% total Fe, mainly as magnetite, were used for the flotation studies.
Recovering Cobalt and Sulfur in Low Grade Cobalt-Bearing V–Ti Magnetite
The flotation process of vanadium–titanium magnetite tailings after one roughing and three sweepings can obtain the separation index of cobalt–sulfur concentrate, with a cobalt grade of 1.53% and cobalt recovery of 90.74%.
Effects of Al(III) Ions at Magnetite Flotation from Quartz by
The flotation separation of magnetite and quartz is a long-term challenge for the beneficiation industry. For high-quartz magnetite, conventional flotation shows poor separation effect, resulting in the waste of resources and low flotation efficiency. In this paper, dodecylamine acts as a collector and Al(III) ions in water act as a depressant to …
Effect of reverse flotation on magnetic separation concentrates …
Reverse flotation studies on magnetite samples have revealed that the use of starch as a depressant of Fe-oxides has a hydrophilic effect on the surface of Fe-bearing silicates and significantly decreases Fe in the silica-rich stream when used in combination with an amine (Lilaflot D817M). In this study, the effect of reverse flotation on the …
Exploring the effect of a polyacrylic acid-based grinding aid …
This study investigates the effects of polyacrylic-based grinding aids (Zalta™ GR20-587: AAG) on the grinding performance and quartz flotation from magnetite. Various AAG dosages and conditions ...
Accumulation of magnetite by flotation on bubbles during …
The flotation model plausibly explains such features, which result from the crystallization of magnetite microlites from a silicate melt, nucleation and coalescence of aqueous fluid bubbles on magnetite surfaces, followed by ascent of a fluid-magnetite suspension along reactivated transtensional faults or through fissures formed during the ...
Reverse Column Flotation of Ultrafine Magnetite Mixture …
Reverse column flotation is one of the methods applied for reducing the content of impurities in magnetite concentrate. This method allows recovering impurities …
Giant Kiruna-type deposits form by efficient flotation of …
We propose that concentration of magnetite takes place by the preferred wetting of magnetite, followed by buoyant segregation of these early-formed magmatic magnetite-bubble pairs, which become a rising magnetite suspension that deposits massive magnetite in regional-scale transcurrent faults.
Preparation and properties of dodecylamine microemulsion …
Semantic Scholar extracted view of "Preparation and properties of dodecylamine microemulsion for the flotation of quartz and magnetite" by Qiao Xiaoxiao et al.
Investigation on the influence of surface roughness on magnetite …
Semantic Scholar extracted view of "Investigation on the influence of surface roughness on magnetite flotation from the view of both particle-particle and bubble-particle interactions" by Zhanglei Zhu et al.
Effect of reverse flotation on magnetic separation …
Keywords: magnetite; flotation; magnetic separation; starch; amines 1. Introduction The demand for high-grade magnetite in the iron and steel and in coal industries had increased significantly. The depletion in the reserves of high-grade magnetite and in-crease in the consumption rate of the product in the indus-
Effects of Al(III) Ions at Magnetite Flotation from Quartz by
The flotation separation of magnetite and quartz is a long-term challenge for the beneficiation industry. For high-quartz magnetite, conventional flotation shows poor separation effect, resulting ...