magnetic separation residue

Iron and aluminum in red mud were recovered by a reductive sintering–magnetic separation–digesting process. The raw materials were composed of ordinary Bayer red mud, MgO, Na2CO3 and C, in which MgO and Na2CO3 were used as mineralizing agents, and C as a reductive agent. Sintering orthogonal experiments …

After magnetic separation, a 95% iron recovery was obtained. This study revealed that additives such as Na 2 CO 3, ... Interestingly, the resulting non-magnetic residue is expected to be Fe, Al and Na depleted, but Ca, Si, Ti and REEs-enriched. Thus, depending on the exact chemistry, it could be used for downstream metal extraction or …

The rest are adjacent and wrapped intergrowths. Low-intensity magnetic separation and pulsating high-gradient magnetic separation were, respectively, proposed to recover magnetite and limonite from the residue, and under the optimized conditions, a high-grade magnetite concentrate assaying 64.05% Fe with 85.59% magnetite recovery …

A new method of solid-phase reduction magnetic separation with pyrite as a reducing agent was proposed in order to realize resource utilization of high iron bauxite residue while reducing environmental harm. FeS2 powder and high iron bauxite residue powder were uniformly blended and roasted in a closed environment. A magnetic …

Consequently, Ag@Au CSNPs are ideal for further biometric binding and signal enhancement [24]. Magnetic separation is an effective and fast enrichment method that can improve the efficiency of SERS detection [25]. Thus, the noble metal-coated magnetic nanoparticles (MNPs) display magnetic separation and signal enhancement …

Recovering iron from the bauxite residue (BR) is one of the long-standing challenges in the mining industry. However, there is a substantial lack of information in the literature regarding sample properties and iron extraction by reducing hydrogen. The present study aims at reducing a Greek BR using hydrogen, its characterization, and …

magnetic separation and pulsating high-gradient magnetic separation were, respectively, proposed to recover magnetite and limonite from the residue, and under the optimized conditions, a high-grade

Advanced separation techniques used for recovery of iron from bauxite residue. Coal dust, most effective reducer amongst sugar cane bagsse, spent spot lining. Reduction roasting is not a good alternative. Best option is Hydrocyclone & magnetic separation with 70% Fe and 80% recovery. Abstract.

The present study investigates the magnetic separation of serpentinite residue from Québec to produce a non-magnetic feed stock for mineral carbonation. This study also scrutinizes the quality of the magnetic fraction recovered for use as a source of iron ore. ... Magnetic separation studies have been extensively carried out and …

type wet magnetic separator. The intensity of the magnetic current was set to 4 A, while the magnetic field strength was 1.28 T. The final products of the magnetic separation included magnetic iron con-centrate, nonmagnetic residues bearing NaAlO 2 and the filtrate. The iron concentrate was analyzed and the iron recovery and content of …

The experimental process was presented in Fig. 1 and comprised three stages, including magnetization roasting of iron tailings, alkaline leaching of roasted products, and magnetic separation of leaching residue. The roasted ore was leached with NaOH solution to remove Si-Al gangue minerals, following a procedure that entailed …

Magnetic separation is a physical separation process that segregates materials in a mixture on the ... storage tank waste treatment and chemical processing residue concentration. The magnetic roll separator is used to separate dry powder mixtures and is most effective on particles ranging from 90 to 850 microns in

Upon magnetic separation, the iron grade in the concentrate of clinker derived from bauxite residue 1# is only 78.90%, with an iron recovery rate of 87.18%. This is primarily due to the limited separation efficiency between the iron and slag components.

The development and application of new materials for the extreme fluoride pollution problem has drawn increasingly wide attention. Here, Chinese medicine residue, FeSO 4.7 H 2 O, FeCl 3.6 H 2 O and Al(NO 3) 3 were used as raw materials to create an novel Al-loaded magnetic Chinese medicine residue-derived biochar (Al/Fe 3 O 4 …

To minimize the carbon footprint in the industrial valourization of bauxite residue, hydrogen was used as a reducing agent. The current study experimentally investigated hydrogen reduction of bauxite residue-CaO sintered and self-hardened pellets at 1000 °C, along with magnetic separation of these reduced pellets for iron recovery. …

In addition, two wet low-intensity magnetic separation tests, with a fixed low-magnetic intensity of 350 G, were examined under 3% ( w / w ) and 10% ( w / w ) solid concentrations on a feed size of

Enrichment of low-grade iron ore, removal of ferromagnetic impurities from large volumes of boiler water in both conventional and nuclear power plants, or the …

We developed a magnetic solid-phase extraction method using Fe 3 O 4 @polydopamine (Fe 3 O 4 @PDA) as adsorbents, coupled with liquid chromatography-tandem mass spectrometry (LC–MS/MS), for the enrichment and quantification of trace matrine and oxymatrine pesticide residues in tea. The adsorbent was easily …

In this paper, a novel process for beneficiation of metallic iron from nickel leaching residue and preparation of ceramsite from tailings by direct reduction–magnetic separation process is reported.

Magnetic separation of iron from the leached residue. For magnetic separation tests, a Davis Tube (Dings Magnetic Separator Co., U.S.A.) (The mineral processing laboratory, IGP, NTNU) was operated in five magnetic fields of 800, 1000, 2500, 2800 and 3200 G keeping all other operating parameters constant. For each test, …

Magnetic separation is a process where a contaminant is first attached onto a magnetic carrier material (e.g., magnetite), and subsequently, the contaminant-laden carrier is …

@article{osti_5453395, title = {Magnetic separation as a plutonium residue enrichment process}, author = {Avens, L R and McFarlan, J T and Gallegos, U F}, abstractNote = {We have subjected several plutonium contaminated residues to Open Gradient Magnetic Separation (OGMS) on an experimental scale. Separation of graphite, bomb reduction …

To recover iron oxides from bauxite residue, magnetic separation has been considered in several instances. However, because hematite and goethite are Fe(III) species with low magnetic susceptibility values of 1 and 0.4 × 10 −6 m 3 /kg respectively [ 2 ], high gradient superconducting magnets producing a magnetic intensity of more than …

In the reductive roasting experiments, the roasting temperature, roasting time and concentration of CO were maintained in the ranges of 600–800 °C, 10–40 min and 2–12%, respectively. The material recovered after quenching was directly subjected to mechanical milling and magnetic separation. 2.5. Mechanical milling and magnetic …

Magnetic separation for recovering iron resources from acid-leaching tailings of laterite nickel ore through mineral phase transformation - ScienceDirect. …

Magnetic separation. The bauxite ore residue obtained from the Bayer process were ground to 98% passing 74 μm in particle size for magnetic separation . The recovery of iron by magnetic separation and TFe and content of TiO 2 of magnetic fraction and non-magnetic fraction were analyzed respectively. The recovery of iron and …

Goethite (α-FeOOH) and calcium sulfate (CaSO4·2H2O) are the main solid constituents of the iron oxide residues in zinc hydrometallurgy by the goethite process. Impounding these residues in tailings ponds is costly to maintain and causes a great threat to the local environment. In this study, magnetic separation was applied to separating goethite …

The aim of this article is to bring a review of recent works where magnetic solid-phase extraction (MSPE) procedures in connection with spectrometric methods …

The reduction and separation of iron oxide phases from red mud was investigated. The residue was reduced by hydrogen at gentle and controlled heating conditions (temperature range between 300 and 480 °C) aiming for the formation of magnetite which can be collected through wet magnetic separation due to its high …

Magnetic separation is an emerging technology that uses magnetism for the efficient separation of micrometre-sized para- and ferromagnetic particles from chemical or biological suspensions. Enrichment of low-grade iron ore, removal of ferromagnetic impurities from large volumes of boiler water in both conventional and …

We are currently developing the magnetic roll or drum-type separator and the high gradient magnetic separator (HGMS) for applications to soil decontamination, liquid waste treatment, underground storage tank waste treatment and chemical processing residue …

Magnetic separation is an effective and fast enrichment method that can improve the efficiency of SERS detection [25]. Thus, the noble metal-coated magnetic nanoparticles (MNPs) display magnetic separation and signal enhancement features. In addition to protecting the core, the noble metal enclosure also increases stability and …

@article{Samouhos2013GreekM, title={Greek "red mud" residue: a study of microwave reductive roasting followed by magnetic separation for a metallic iron recovery process.}, author={Michail Samouhos and Maria Taxiarchou and Petros Tsakiridis and Konstantinos Potiriadis}, journal={Journal of hazardous materials}, year={2013}, …

In recent years, a low-grade vanadiferous titanomagnetite concentrate (LVTC) produced in the northwest area of Liaoning has attracted more and more attention. However, it is difficult to recover and utilize valuable minerals such as iron, titanium, and vanadium, due to their special physical and chemical properties and complex mineral …

The optimum conditions of magnetic separation were obtained with multiple pass approaches; at 40% initial pulp density and 7.5 x 10- 3 tesla (T) magnetic intensity with a mean particle size of 75 μm.

The subsequent magnetic separation was performed by using a magnetic field intensity of 111 kA · m−1 and a grinding fineness less than 45 μm of 96. 19% for the sintered product. View Show abstract

The bauxite ore residue used in this study was a byproduct of the Bayer process. The main compositions of bauxite ore residue sample and the non-magnetic material prepared by reductive roasting-magnetic separation process of bauxite ore residue are shown in Table 1.The reductive roasting and magnetic separation process …

Magnetic Separation of Impurities from Hydrometallurgy Solutions and Waste Water Using Magnetic Iron Ore Seeding. Written …

This study investigates the properties of H2-reduced calcium-added bauxite residue, self-hardened pellets, and the feasibility of iron recovery through electrostatic and magnetic separation methods. The oxide pellets are prepared via a mixing of bauxite residue, calcite, and quicklime. The self-hardened pellets are reduced at 1000 °C with …